cold roof– what is a cold roof – extremely simple design. A waterproofing film or membrane is placed on the rafters to protect the attic space from the formation

cold roof- couldn't be easier. Its name speaks for itself. The device of a cold roof does not provide for its insulation. Waterproofing is placed on the building saw, then a crate, on which the roofing is mounted.

How to make a cold roof from a metal tile

First, a waterproofing film is placed on the rafters, and if the attic is insulated, then a more expensive material is laid - a membrane that will protect the attic from leakage and condensation that form on the metal roof with inside. A crate is fixed on top, and roofing material is laid on the crate. Moisture and vapors are removed with the help of special passages on the roof. In addition to this, dormer windows are used to ventilate the attic. The design scheme of a cold roof assumes a simple design, installation and operation. A modern metal tile in Kiev or any other city costs relatively little and will last a long time.

Installation of a cold roof

There are a few things you need to know before you start roofing your home. If the attic is to be insulated, a more expensive waterproofing membrane must be used. If there is no insulation, there is a cheaper waterproofing microperforated film that, when touching the insulation, allows water to pass through. It cannot be used for heating. You should not stretch the film too much, so that it sags a little. The sagging of the film allows water to drain to the middle of the run, thereby not falling on the rafters. Good ventilation is achieved, in this way special gaps are made in the waterproofing under the ridge.

This type of roof is also suitable for use in regions with severe frosts. The insulated attic floor implies that there can be no restrictions on the use of this roof according to the standards provided climate zone. In cold weather, it is necessary to thoroughly insulate the ventilation devices so that condensation does not form and the roof does not freeze.

It is allowed to use any materials for a cold roof that do not need a solid base. The best option would be to use durable and technologically advanced materials - these are profiled sheets or metal tiles. Now in the manufacture of profiled sheets and metal tiles, steel coated with a special powder is used in production, this greatly increases the service life of the material. If it seems that the profiled roof covering is not very beautiful, then there is an option to use metal tiles, it looks more aesthetically pleasing and exactly repeats the shape natural tiles, but with the benefit of low weight and easy installation.

The description of the cold type roof can be considered complete. There is nothing difficult in this process if you follow the instructions and do everything according to the instructions, without neglecting the advice of specialists.

Cold roof - what it is and how it is mounted
A cold roof is no easier. Its name speaks for itself. The device of a cold roof does not provide for its insulation. Waterproofing is placed on the building saw, then a crate, on which the roofing is mounted.

If you do not plan to make a living room in the attic, you can leave the attic cold - store some things here, arrange a workshop, hayloft, etc. The roof does not need to be insulated. How is a cold roof made of soft tiles, are there any features?

The device of a cold roof from a soft tile

The basic rule for cold attics does not depend on the coating: a full-fledged cake is made in the attic floor, otherwise the house will be cold.

note

Otherwise, the cake is made according to all the rules: vapor barrier, waterproofing, the floor is sewn up with boards from above.

The second feature concerns ventilation. This is where the material differences come into play. Soft roofs (unlike profile metal) do not have waves that would serve as ventilation. The bituminous covering is completely tight, does not breathe.

note

Otherwise, the technology of a cold roof made of soft tiles differs from that of an insulated one: on cold roofs, a continuous crate can be laid directly on the rafters (without a counter beam). The entire attic serves as a ventilation gap. The crate and rafters are not closed from the inside.

Features of ventilation of a cold roof from a soft roof

When installing a cold roof, additional measures are taken to ventilate the attic:

• v wooden houses with gable roofs on all gables, boards are loosely fitted, air penetrates through the cracks. This method is easy to perform, but it is not suitable for houses with stone / brick gables, as well as for hip roofs which have no gables at all. Another disadvantage is that rainwater penetrates into the cracks along with the wind,

• ventilation holes are made in stone and brick gables. Their total area is 0.2 percent of the area of ​​the attic itself, otherwise it will not be enough for full ventilation. Ventilation grilles are placed with holes down so that rainwater does not flow into the attic,

• for hip roofs, one ventilation hole is located in the filing of the cornice, the second - at the ridge. As a filing, loosely fitted boards or perforated plastic spotlights can be used,

• hipped and round roofs do not have a ridge. This will require the installation of point aerators.

I already wrote more about the ventilation of soft roofs in one of the articles. You can meet her here.

Our work

Approximate instructions for installing a cold attic on a soft tile roof

Due to the lack of a pie, it is easier to make a cold roof than a warm one:

1. Lay a solid sheathing of plywood or OSB on the rafters. Plates must be laid with a gap between the joints. The joints should fall on the rafter legs. Between adjacent plates/sheets - a technological gap of 3 mm. Fastening with screws or nails.

2. Lining carpet: on sloping roofs, cover the entire area of ​​the roof.

note

3. Install cornice drip strips over the edge of the carpet. Fix with nails in a zigzag after 10 cm.

4. Install the end strips in the same way.

5. In valleys, a valley carpet is laid over the lining. Fix the edges with nails after 20 cm.

6. The tiles are laid in rows from the eaves to the ridge. Installation of tiles on gable roofs starts from the end, on hip roofs - from the middle of the overhang.

7. The cornice row is laid on top of the plank with an indent from the edge of 3-5 cm. They are put on glue (or on a self-adhesive layer), fixed with nails. The joints of the cornice strips should be closed with petals.

8. The next rows are laid so that the petals overlap the attachment points of the previous ones.

9. In the valleys and at the ends, the tiles are cut and put on glue. Fixation with nails.

10. Triangular bars are installed at the junctions with pipes, walls, etc. The carpet and tiles are brought onto the bars, the edges are put on glue.

11. The direct connection to the pipe is treated with a valley carpet, covered with a metal apron, and the joints are sealed.

12. An aerator is installed on the ridge. Ridge aerators are included in the tile material kit. They are structurally different from different manufacturers, the installation procedure for each is described in the instructions.

13. A ridge tile is placed on top of the aerator. Overlapping adjacent tiles is recommended to be done in the dominant wind direction.

Installation of flexible tiles is an energy-intensive task that requires accuracy. Our company STM-Stroy has more than fifteen years of experience in the installation of any roofs, we have qualified craftsmen.

We will perform for you a cold roof of soft tiles in a short time, with high quality and at a reasonable price.

Cold roof tiles
If you do not plan to make a living room in the attic, the attic can be left cold, the roof does not need to be insulated

Cold roof - what is it

A cold roof is an extremely simple design. A waterproofing film or membrane is placed on the rafters to protect the attic space from the formation of condensate that falls on the inside of the metal roof.

A counter-lattice is attached from above, after that - a crate, and then the actual roofing is already installed. Water vapor is removed from the under-roof space through special passages under the ridge and on the slopes.

In addition, ventilation of the attic space is also carried out through dormer windows. A cold roof is characterized by simplicity of design, so it is easy to design, install and operate.

There are a number of things to be aware of before starting installation. If you later intend to insulate the attic or turn it into an attic, you must use a TYVEK-class waterproofing membrane, since the waterproofing micro-perforated film for cold roofs is not designed for flush-mounting insulation. It loses its properties upon contact with it and passes moisture, as a result of which the insulation gets wet. If roof insulation is not planned, you can save money and buy a cheaper waterproofing microperforated film. It is necessary to pull it with a sag of 20 cm so that the water flowing down to the middle of the run does not fall on the rafters. To achieve unhindered ventilation, a special gap is made in the waterproofing under the ridge.

Some believe that this type of roofing is not suitable for areas with severe winters. This is not true: a cold roof and a cold attic are traditional solutions with a long history. If the attic floor is insulated in accordance with the standards established for a given climatic region, there are no restrictions on the use of a cold roof. It is enough to reliably insulate the ventilation equipment so that condensation and icing do not form.

As the actual roofing material for a cold roof, any materials that do not need a solid base are suitable. Optimal choice- corrugated board or metal tiles - reliable, technological and durable materials. Especially if, in their production, powder-coated steel, which has been widely used in recent times, has repeatedly increased the service life. If the profiled sheet does not look aesthetic enough, then a metal tile is suitable, which reliably imitates the natural one, but differs in less weight and simple installation.

Cold roof - what is it
General concept and options for installing a cold roof with your own hands. Cold roofing from metal tiles and corrugated board. Do I need to insulate a cold roof?

Comfortable living in the house is impossible without a well-equipped roof. In order to reduce heat loss during the cold months of the year and create a favorable microclimate for people staying in the house, they use different materials, including corrugated board.

Thanks to the multi-layer roofing cake containing a layer of thermal insulation, heated air does not leave the premises in cold weather. Installation of a vapor barrier under corrugated roofing helps to maintain low thermal conductivity.

Why do I need a vapor barrier under corrugated board

Many homeowners are interested in whether it is possible to cover the roof with corrugated board without waterproofing, and why it is needed.

The vapor barrier layer in this case is equipped to achieve certain goals:

1. To protect the insulation from the penetration of wet fumes. The fact is that as a result of its wetting, an increase in thermal conductivity occurs. In addition, the penetration of moisture leads to the destruction of the material.
2. To prevent the accumulation of liquid in the thermal insulation layer and the direction of water vapor to the outside.

Water vapor is always present in the air of residential buildings. They are partially removed from the premises ventilation system and the rest remain. Steamy warm air rushes to the ceiling, where it cools, and the resulting moisture penetrates into the roofing materials.

The insulation has a porous structure and therefore absorbs wet fumes. In the process of getting wet, the thermal conductivity of the material increases, and it retains heat worse in the house. To prevent the penetration of moisture into the porous structure of the insulation, a vapor barrier is mounted under the corrugated board.

A film for arranging a vapor barrier layer is placed on the side of the premises in order to protect the material for thermal insulation and elements of the roof structure from vapor penetration.

Features of the choice of material for vapor barrier

The building materials market has a wide range of special films for mansard and cold roofs used for the construction of a vapor barrier layer.

In order to make the right decision as to whether a vapor barrier is needed for corrugated board, it is necessary to have information on a number of factors:

Before purchasing materials for profile flooring, it is necessary to deal with the financial side of the construction. If the defining moment is the price, then choose economical products.

In terms of efficiency, vapor barrier films differ in performance and should be familiarized with in advance.

When choosing a material, the characteristics of a particular room are taken into account. For a heated building best buy there will be a foil film, but for a cold roof made of corrugated board, inexpensive glassine will be enough. When a roof is erected on a building that is visited occasionally, a vapor barrier made of polypropylene or ordinary polyethylene film will be required.

Vapor barrier products for the roof

To lay a layer of vapor barrier under corrugated board or other roofing, films are used.

On the construction market The following are the most popular types:

1. polyethylene film. This inexpensive household material has long been used as a vapor barrier. It delays the steam coming from the living quarters. Polyethylene is cheaper than membranes and reinforced films. It has a big minus - insufficient strength, since it can be easily damaged during installation. To make the insulation reliable, the film is laid out in two layers. It is attached with a special stapler to the inner crate, observing a step of 1.0–1.5 meters. In case of damage to the material, a patch must be made. To do this, the puncture site is sealed with construction tape. You should also fix the joints.
2. Reinforced polyethylene. It is inexpensive but of good quality. It is made from several layers of polyethylene and reinforced with a polypropylene mesh for strength. Despite the low weight, such a film is strong enough and it is more difficult to damage it during the fastening process. Due to the reinforcement, the material is more rigid. The film is fixed with a special tape. Choice this material can be called optimal combination affordable price and good quality.
3. glassine. It has been used to create a vapor barrier for a long time. He is reliable protection from moisture, differs in durability, has long term service, but, unfortunately, it has a lot of weight. Despite the cheapness, glassine is not recommended for use in residential areas. In case of heating, the material begins to emit an unpleasant odor, and after laying the corrugated board, its temperature rises frequently. For the reason described above, glassine is used when the answer to the question of whether waterproofing is needed under the corrugated roof of a cold roof of a non-residential attic is positive. It is convenient to use for laying waterproofing over the crate.
4. Polypropylene film. Is an durable material for vapor barrier laid under profiled sheets. It is produced in a similar way to a polyethylene multilayer film, but it has an embossed layer. On films with a smooth surface, condensation accumulates, then it collects in drops and from time to time they fall to the floor. A film with a rough surface is produced on the basis of cellulose and viscose. It is able to absorb moisture and this feature prevents the formation of drops. Further, under the condition of lowering the humidity of the air, the collected condensate evaporates. Mount the film with an anti-condensate surface to the room. For correct execution installation work you need to read the manufacturer's instructions. This type of film is one of the the best options vapor barrier devices under the profiled sheet.
5. foil. At its core, it is a kind of polyethylene or polypropylene products. She has not only a reinforcing mesh, but also a thin layer of aluminum that reflects infrared rays and helps to keep warm. As a result of using a foil film, heat loss is reduced by more than 10%. The cost of such an insulator is higher compared to other types of vapor barrier materials, but its installation allows you to save on heating costs. The foil film is laid with an aluminum coating towards the room. Between it and the wall decoration should leave a gap of about 5 centimeters. There should also be a small gap to the insulation. To fix the film, self-adhesive tape is used, and the joints are covered with aluminum tape, and then the vapor barrier layer is sealed.

Waterproofing cold roofs - is it necessary?

The space under the cold type roof is not heated, but the temperature inside is always different from the outside. For this reason, condensate collects from below the profiled sheets. Therefore, the answer to the question: “When a cold roof is being built, is waterproofing necessary?” unambiguous. Of course it is.

This layer will prevent moisture vapor from entering the wooden elements of the truss system and other parts of the roof structure. Waterproofing is laid on top of the rafters and then fixed with a counter-lattice. Next, mount the crate and profiled sheet.

When the waterproofing layer does not prevent steam from escaping to the outside, then there is no need to equip a vapor barrier for a cold roof. Rising up, water vapor enters through the film under the corrugated board and dries up in that place due to the movement of air flows. In this case, roofing material, polypropylene, glassine and polyethylene are not suitable. For a cold roof, experts recommend using a non-woven vapor permeable membrane.

Vapor barrier device

Do I need a vapor barrier for a cold roof? No, because it is equipped only for warm roofs, so that moisture does not get into the insulation.

The panels of the vapor barrier layer are laid with an overlap of about 15 centimeters. For the selected type of film, a connecting tape is selected. Small slats for her can be wooden or metal.

Vapor barrier under corrugated roofing: is it necessary to waterproof a cold roof, can it be covered without it under a corrugated sheet

Vapor barrier under corrugated roofing: is it necessary to waterproof a cold roof, can it be covered without it under a corrugated sheet

Everything you need to know about choosing a vapor barrier for cold and mansard roofs

When planning your home project, you always want it to be warm and cozy.

To do this, follow the instructions when carrying out construction work.

Also, enough attention must be paid to the insulation of the roof, in particular, the competent provision of all types of insulation.

How to choose a vapor barrier for the roof and not make a mistake? First, let's get acquainted with the types of vapor barrier materials.

What is vapor barrier?

In residential premises there is always water vapor that circulates inside it. And according to the laws of physics, it rises with warm air. Over time, it will penetrate into the under-roof space, where it starts absorbing heat.

To avoid these consequences, it is necessary to install a vapor barrier, which should be present in any roofing cake. Some believe that finishing the attic with a cladding that prevents moisture from entering eliminates Negative consequences. But it is recommended to always use a special coating, which is placed between the ceiling and the insulation.

What vapor barrier to choose for the roof?

There are the following types of vapor barrier for the roof:

Painting shop

Used more frequently for high-rise buildings, soft roofs made of roofing material, iron roofing sheets where insulation is not used. This vapor barrier is well suited for flat roof. The main difficulty in using mixtures of this kind is the preparation of the surface before application. For this type of insulation, the following compositions are used how:

• hot bitumen;
• bitumen-cookersalt mastic;
• varnish based on chlorinated rubber or polyvinyl chloride.

Pasting (membrane)

This species is more popular, especially in individual construction. Materials for this kind of insulation are produced in rolls and this provides some advantages:

• simplification of styling;
• security hermetic connection with an overlap;
• reduction in the number of seams.

Types of pasting vapor barrier materials

• waterproofing. Prevent the penetration of steam into the insulation. Have a special perforation which allows vapors to escape. Mounted with some clearance from roofing, what promotes air circulation between the outer and under-roof space. Possesses unidirectional steam permeability, keeps thermal insulation dry.
• Anti-condensation. Equipped with a special fleecy layer which is on their inner surface. It retains moisture and prevents ingress on thermal insulation. Moisture quickly disappears due to air circulation in the gap. This type of insulation should be laid with an absorbent layer towards the interior of the room. Fastened with a counter-lattice.
• Vapor proof. Provide impenetrable protection to the inside of the roof insulation. Sometimes they have a layer aluminum foil , which is capable of reflecting some of the radiant energy back inward. Fitted with a ventilation gap to the insulation. Provides good protection from moisture while retaining heat.
• membranes. They are modern vapor barrier materials that can prevent moisture from escaping, while passing air. When using membranes, an air gap is often not necessary. This material for roof vapor barrier has gained great popularity these days.

Special arrangement of such roofs does not require laying two layers: thermal insulation and vapor barrier. This saves money and building resources. Water vapor that passes through the film is between the waterproofing and the corrugated board, from where it is removed by the air flow.

Therefore, the main task when installing a cold roof is ensuring good ventilation, which is provided by creating a gap with the help of a counter-lattice.

Cold roof device

Do I need a vapor barrier under the corrugated roof of a cold roof? No, it is not needed, the main thing is to take care of good ventilation.

Vapor barrier for mansard roof

The most commonly used materials are: glassine, roofing material and foil insulation. Modern membranes are also quite effective., which have proven themselves in this sector and are excellent for the vapor barrier of soft roofs.

First of all, it is necessary to seal and insulate various structural elements. The vapor barrier is laid on the insulation and fixed by a method that corresponds to the surface material.

Fastening to concrete, brick and metal surfaces is carried out using double-sided adhesive tape, laid with 10 cm overlap. And it is attached to the tree with nails or stapler staples.

The foil film is installed with a reflective layer inside the room so that the thermal energy remains inside the building. Between the heat-insulating and vapor barrier part, a gap is provided for ventilation, as well as to create a warm air barrier.

Detailed scheme of the device roofing pie mansard roof

The joints of the film are glued with adhesive tape from a material with a close coefficient of thermal expansion. It is better to press the junctions of the foil to the wall with planks with a sealant applied under them.

Vapor barrier under corrugated board or metal tile

The metal tile is a heat-conducting coating, therefore, with the onset of cold weather, condensate causes irreparable harm to it. To solve this problem, it is necessary to provide the roof with competent vapor barrier and waterproofing. Before choosing, you should decide which is more important: price or efficiency? Let's look at which vapor barrier is best for a metal roof:

Cheap option - glassine and polyethylene

glassine can last a long time, while has sufficient flexibility and low cost. However, its large mass, unpleasant odor when heated, and installation difficulties make it not the best option.

Polyethylene retains steam well and protects thermal insulation layer from moisture. It is cheap, but polyethylene is very easy to damage. It is difficult to mount it yourself. Due to the significant weight, install the film standard method hard to corrugated board. Therefore, installation takes place to the inside of the cladding using a stapler. The film is mounted in two layers.

Reinforced film, foil, membranes

In terms of price, it is also an acceptable option. Reinforced film consists of several layers with a reinforcing fabric mesh that adds strength. Light weight and rigidity allow you to install such insulation yourself. Fastened with self-adhesive tapes. A significant drawback is the lack of an anti-condensate layer, which can adversely affect the insulation.

Scheme of the device of a roof from a metal tile

What vapor barrier to choose for a roof under a metal tile? One of the best options is foil. It has a low heat permeability, which allows you to keep warm in the room, low weight and sufficient strength. The big disadvantage of this material is the tendency to form corrosion.

Conclusion

The penetrating power of steam is sometimes underestimated, which leads to a rapid failure of thermal insulation. Therefore, it is necessary to responsibly approach the issue of vapor barrier and take into account all the nuances when choosing materials and carrying out work. This will provide long term future building services.

Which vapor barrier to choose for the roof: choose a vapor barrier for a flat, attic, cold roof

Not sure which vapor barrier to choose for your roof? We will tell you about the types of vapor barrier for the roof, consider whether a vapor barrier is needed for a cold and mansard roof. Let's also talk about what vapor barrier material suitable for flat roofs and roofs made of corrugated board and metal tiles.

Do you need a vapor barrier under a cold roof?

Today, more and more developers are asking this question. The fact is that a cold roofing system allows you to build a residential building for relatively little money, when an insulated roof requires enormous costs both financially and in terms of time and effort. Realizing that such a system is in a sense better, many developers have wondered if a vapor barrier is needed under a cold roof?

Cold roof construction in a residential building

Many developers who want to save some money on construction tend to purchase the cheapest materials, but at the same time, so that the quality of the entire building does not suffer much from this. This is possible if primitive two slopes are used as a rafter system, corrugated board as a covering, and the roof is made cold.

The design features of such a roof can be listed on the fingers, since there is no need to lay heat-insulating material, a vapor barrier layer and other components that are often found on insulated roofs. If you all doubt the savings, then it is safe to say that the cold version will cost 50-60% less than the insulated design. In addition, the work can be carried out independently, therefore, the savings will increase even more.

A cold roof pie, in most cases, includes the following products:

• rafter legs
• waterproofing material
• Control lathing
• crate
• Profiled metal sheet

Do I need waterproofing under the metal roof of a cold roof?

It is worth noting that all metal surfaces have one similar feature, they collect condensate. Waterproofing, which is part of the roofing pie with a cold roof, will correct this problem and protect the room from incoming moisture, both from the outside and from the inside. Many developers, when building an insulated roof, advise their friends not to lay a vapor barrier layer if they are building a building with a cold type of roof. They think that the cold will remove the condensation that is visible on metal products, but they are greatly mistaken.

Condensation occurs due to the temperature difference between the roof space and the external environment. Naturally, when the attic is not heated and not insulated with anything, the difference will be small, but still it is sufficient to provoke the release of moisture from the air. As you can see, condensate will form regardless of the type of roof, therefore, the question posed at the beginning of the paragraph can be answered unequivocally: yes, it is needed.

An example is outbuildings, the owners of which do not care much about their service life. In such buildings, the roofing cake is the most primitive and even violates building codes and regulations. Most often, a roofing cake consists of rafters, discharged lathing and roofing. All layers of vapor barrier and waterproofing were simply thrown out. Despite this fact, this building can stand for a significantly long period, or vice versa, fall apart after a couple of years. Here you are already lucky, but why take risks if you can do everything in a quality way?

Risks cannot be allowed on residential buildings, as someone's life may depend on it. I am not exaggerating, because if the condensate affects the rafter system and other roof elements for a long time, it will simply destroy them, which can lead to the fall of the entire roofing pie.

Waterproofing and ventilation of a cold roof

If you are laying a micro-perforated product, then such a layer will block moisture from the outside, but water vapor can pass through this area without problems. It can be said that the installation of vapor barrier products on roof slopes is not necessary in this case. After the steam penetrates inside, it is between the waterproofing material and the metal coating, from where it is removed by natural ventilation.

At high humidity air, condensation processes begin, so moisture accumulates on the reverse side of the film and penetrates into all roofing materials. In connection with this fact, it is not recommended to use materials such as polyethylene and polypropylene, roofing felt, and glassine for the construction of a cold roof.

The ventilation system of cold roofs is quite simple. To create it, gaps are left, which, as a rule, are located along the cornice overhang. Air masses pass through them, collect all the humidified air and remove it through a cold triangle located in the ridge part of the roof.

The counter grille is a design to provide additional ventilation. Most often it can be found on complex roofing systems, where products with a high degree of waterproofing are used as a coating, for example, metal, shingles and others. The gap that is created by installing the control battens allows fresh air dry the roofing cake on both sides, so structures with such a cake last much longer than the others.

Cold roof. Do buildings need waterproofing?

First of all, it should be noted that outbuildings differ significantly from residential buildings both in their structure and volume. The vast majority of developers are trying to save on the construction of secondary structures, so the issue of waterproofing is more relevant than ever. Before answering the question posed, let's deal with the coverage. To date, corrugated board is one of the cheapest materials, so I will talk about buildings covered with it.

Manufacturers different countries strive to produce such products so that the whole world begins to use it. If you are a fan of corrugated board, then today, such material is a sheet of metal with an anti-condensation coating.

In its appearance, it practically does not differ from its counterparts. A synthetic composition is applied from the inside, it looks like felt. Due to the large number of pores, this material is able to retain up to 1 liter of water per square meter. After the surface has been saturated with moisture, ventilation comes into play and if it is done in accordance with all the rules and regulations, then the drying process will not take much time.

Thanks to the laying of such a "cunning" coating, the need for laying a vapor barrier and waterproofing layer is removed, but it should be understood that the weight of such a coating will vary depending on weather conditions. Making necessary calculations it is very important to take into account these parameters and use them in the calculations. It is worth noting that the finished roof will be much cheaper, because it will not have almost half the roofing cake.

Installation of waterproofing for a cold roof

So, based on the information obtained above, you understand that waterproofing material fit regardless of the type of roof and functional purpose the buildings. However, if you want to save money, you can use roofing with an anti-condensation layer, but not all people like metal coatings, so I will now tell you the general principle of laying waterproofing.

• First of all, an inexperienced roofer must repeat the safety precautions and the principle of working at height. After that, he puts on a special uniform, which should include the following: personal protective equipment, good shoes with non-slip soles and a mounting belt.
• After the rafter legs are fixed in place, you can start laying the vapor barrier layer. It is attached to the rafters with a construction stapler and pressed against the crate. With a small slope, the strips of material are placed across the slope, and along the strongly sloped slopes. To improve the quality of laying this layer, the joints are smeared with bitumen or glued with double tape.

• Next, the counter-lattice is laid. She creates the necessary air layer, thanks to which moisture will be removed from the roofing cake.
• A waterproofing material is laid on top of the konroblattice.
• After that, proceed to the installation of sheets of corrugated board.

Most developers strive to cover as much length as possible with one strip of profiled sheet. This is justified by the fact that in this way fewer joints are obtained, therefore, the waterproofing qualities of the entire roof increase significantly. You can do all the work yourself, but to increase efficiency it is better to invite 1-2 partners.

Do I need a vapor barrier under a cold roof: waterproofing under a metal tile

If you are wondering: do you need a vapor barrier under a cold roof? Then after reading this article you will understand everything. It describes the nuances of insulation and the technology of laying suitable materials.

Cold roofing from corrugated board: device and technology

A house with a cold attic is far from uncommon in modern construction. This solution is especially relevant for outbuildings, as well as cottages. Often a cold roof made of corrugated board is also made in residential buildings when the main area of ​​\u200b\u200bthe house is enough for its owner and there is no need to make an attic.

The device of a cold roof is expedient, first of all, for economic reasons. Firstly, you save on materials, and secondly, by isolating a large under-roof space from the rest of the house, you do not spend money on heating it. And thirdly, installing a cold roof is much easier than laying a full-fledged roofing pie.

The device of a cold roof from corrugated board in a residential building

The design of a cold roof is very simple. On slopes, neither insulation, nor vapor barrier, nor, moreover, finishing is needed. Naturally, the savings in this case are very significant, given that the price of thermal insulation and finishing is 50-60% of the cost of the entire roof. In addition, due to the simplicity of the design, a do-it-yourself cold roof made of corrugated board fits without any problems.

The cold roof pie consists of the following elements:

1. Rafter;
2. Waterproofing film or membrane;
3. Counter grille;
4. crate;
5. Decking.

Cold roof waterproofing: is it necessary?

Waterproofing a cold roof will protect the room from possible leaks and condensation that forms on the inside of the metal roofing. Since condensate is released on metal surfaces during temperature changes, there is a common misconception that it will not occur when an uninsulated corrugated roof is installed.

Naturally, such an opinion is not true, because, despite the fact that the roof space is not insulated and heated, the temperature inside will still differ from the temperature outside, and often quite significantly. Therefore, the answer to the question: “Will there be condensation on the corrugated board if the roof is cold?” - unequivocal: "Yes, it will."

In this regard, it becomes obvious whether waterproofing is needed under the cold roof corrugated board. The consequence of its absence will be that the condensate will fall on the ceiling, increasing the humidity in the attic. This will lead to best case, to accelerated damage to wooden structures, and at worst - also to a catastrophic decrease in the heat-insulating properties of the insulation, if it is unprotected.

The waterproofing membrane of the cold roof is laid on the rafters and fixed with a counter-lattice, after which the crate is already mounted for the installation of corrugated board.

If you are not going to insulate a cold roof in the future, then microperforated film can be used as waterproofing, which is much cheaper than special membranes. However, it must be mounted with a mandatory sag of 20-30 mm so that moisture flows into the space between the rafters, and does not moisten them, seeping through due to the capillary effect.

Vapor barrier and cold roof ventilation

Since micro-perforated films prevent the penetration of moisture from outside, but do not interfere with the passage of water vapor, vapor barrier of a cold attic on the roof slopes is not required. Water vapor, passing through the film, is between the waterproofing layer and the corrugated board, from where it is removed by the air flow.

If the waterproofing film for a cold roof retains water vapor, this will lead to excessive moisture in the room and, as a result, dampness. In addition, with increasing humidity, steam will condense already on the film from the inside. Therefore, ordinary polyethylene and polypropylene films, as well as outdated materials such as roofing material or glassine, are not suitable for waterproofing a cold roof.

Ventilation of a cold roof is very simple and is ensured by creating a gap with a counter batten: the air flow enters under the roofing through the eaves and exits through the ridge.

The presence of a counter-lattice is a prerequisite for good ventilation. It is this gap of several centimeters between the film and the crate that allows the air flow to pass unhindered under the roofing.

Ventilation of a cold attic is carried out using conventional dormer windows, which must be located in such a way as to ensure the passage of air flow during ventilation through the entire room. If the dimensions of the roof space are large, the ventilation of a cold attic in a private house can be improved using a classic supply and exhaust scheme.

If you are planning to insulate a cold attic in the future

In the event that a cold roof made of profiled sheet is a temporary option, and in the future you plan to insulate it to create a full-fledged living space, microperforated film should not be used as waterproofing. The fact is that it is impossible to mount a heater close to it - if this is done, the film will lose all its waterproofing properties and begin to let water through.

This film must be replaced with a non-woven vapor permeable membrane. In particular, those types of Tyvek or Dorken membranes that can be laid directly on the insulation are perfect for these purposes. Of course, they are more expensive, but their use will reduce the thickness of the roofing cake by 80-90 mm. If you already use micro-perforated foil as waterproofing for a cold corrugated roof, you must ensure a gap of at least 50 mm between its lowest point, taking into account sagging, and thermal insulation.

In addition, the vapor barrier of a cold roof converted into an insulated one is not needed, since the steam will pass through the insulation and, without lingering in it, will be removed through the film or membrane.

Cold roof from corrugated board in utility rooms

For sheds, change houses and other utility rooms, a cold roof made of profiled sheet is the best option. In this case, it is recommended to use a special corrugated board with an anti-condensation coating.

Such a profiled sheet is coated on the reverse side with a special synthetic composition, which is similar in structure to felt. Due to the large number of small air cavities, this material can hold enough a large number of moisture - up to 1 liter per m2. Thus, with an increase in humidity, the anti-condensation coating absorbs water, which then evaporates under the action of cold roof ventilation.

Thanks to the use of a profiled sheet with an anti-condensation coating, the construction of a cold roof becomes much simpler and cheaper, since neither waterproofing nor a counter-batten is needed. In addition, such material is indispensable for arbors, verandas, sheds and other open structures, since waterproofing is generally not used in them, and condensate appears no worse than in a cold attic.

Installation of a cold roof from corrugated board

The cold roof of a house from a profiled sheet is easy to install and can be easily assembled by hand without the involvement of specialists.

First, waterproofing is mounted, with sagging, if microperforated film is used as it. It is fixed with the help of bars of the counter-lattice, nailed to the rafters parallel to them.

Then the crate of the house is performed.

Next, the direct installation of a cold roof from corrugated board is carried out. If the width of the roof slopes is less than the maximum possible length of the corrugated sheet, then it is laid without transverse joints at all, which improves the tightness of the coating. Side joints are made in 1-2 waves, depending on the slope of the roof and the grade of the profiled sheet.

The technology of a cold roof is quite simple, so its installation is carried out quickly enough. However, all the wooden components of the roof must be processed in advance special formulations, which will prevent their decay, as well as damage by mold and fungus.

How to insulate a cold roof?

Often the device of a cold attic is just an intermediate stage. Most cold roofs are insulated over time in order to increase the living space of the house. This is easy to do, since there is no need to redo the cold roof pie - it is, in fact, the top of the insulated roof pie.

In order to make an attic out of a cold attic, you just need to add a layer of insulation and finishing. If, as we recommended, you used a waterproofing vapor-permeable membrane as a waterproofing, and not a microperforated film, then the material for thermal insulation is laid tightly between the rafters. Then an internal crate is made with bars of the required thickness, between which a second layer of insulation is mounted. They can also be fixed finishing - wooden boards or drywall.

When insulating a cold attic, a vapor barrier layer is not needed, since water vapor from inside the room will pass through the insulation and exit the roofing pie through the waterproofing membrane into the under-roof space. Therefore, before insulating a cold roof, do not forget to process all internal wooden structures compounds that prevent decay.

In addition to this method, insulation of a cold roof attic can also be performed using polyurethane foam spraying. This is one of the fastest and simple options, moreover, this insulation is considered one of the best existing on the market. It is fireproof, has excellent heat-insulating properties, is durable, resistant to acids and alkalis, and does not rot.

In addition, the insulation of a cold roof from corrugated board with the help of polyurethane foam allows you to create a continuous layer of thermal insulation, in which not only there will be no gaps, but also the rafters will be closed. The only downside to this method is the cost. Also, you will not be able to do this work yourself, because it requires expensive equipment.

Cold attic device: ventilation, waterproofing, insulation

The device of a cold roof in a residential building and utility rooms: technology, features and ways to save. How is cold roof waterproofing and attic ventilation carried out? How to insulate a cold corrugated roof?

Today, in the construction of a residential building, various options roof structures, but the simplest is a cold roof. Such a device is great when the attic space is not used as a residential additional space. The very scheme of such a roof is very simple: load-bearing structures, waterproofing, lathing and counter lathing, plus roofing material.

The features of the installation of such a cold roof are that it is necessary to provide a ventilation gap for the removal of condensate in order to protect not only the supporting structures, but also the roofing in the form of a metal tile from the negative effects of moisture.

The installation of such a roof itself does not differ in any difficulties, the main thing is to correctly fix the profiled metal sheet so that precipitation does not penetrate through the joints under its surface. Before starting construction, you should make all the required calculations, calculate the angle of inclination, the step of the crate, decide on.

Features of a cold roof

A cold roof differs from a warm one in its design, although its design itself is extremely simple. The only thing to consider is the option of roofing. When using metal tiles, it is necessary to provide a ventilation gap for the correct removal of condensate from the under-roof space. This is done so that the steel sheet does not corrode.

The device of a cold roof is the installation of a truss system, on which a membrane or plastic film is laid for waterproofing. After that, a counter-lattice, a crate and a coating in the form of a metal tile are nailed.

The features of such a roof are the complete absence of a layer of heat insulator, the presence under the ridge and on the slopes to remove moisture. Design and installation are not difficult, the main thing is to correctly carry out all preliminary calculations.

The installation itself includes the following features:

1. If it is planned in the future, then it is necessary to approach very carefully the choice of a membrane to protect against excess moisture. For the future attic, only specialized waterproofing in the form of membranes made of PVC is suitable.
2. If further insulation is not planned, then microperforated waterproofing is used, designed specifically for cold roofs. Such a film does not allow laying next to it thermal insulation materials, that is, with further warming, you will have to spend money on a new membrane. If this condition is not met, then the roof will practically not be protected from moisture in the future, the insulation will be constantly wet, and the roof covering will be subject to corrosion.

Sequence of work

To lay the waterproofing membrane, it must be remembered that its installation is carried out with some sag, approximately 20 mm. Such a device allows the condensate to drain, that is, the rafters and other roof elements are protected from moisture. In order for the water to evaporate effectively, and not to stagnate, creating an unfavorable atmosphere, it is necessary to ensure the presence of a ventilation gap, which is made between the waterproofing film and the roof ridge.

Such a gap allows air to circulate unhindered in the under-roof space, removing all traces of condensate. The roof protection membrane itself should not have ruptures or other defects; it should be fixed using a construction stapler.

Be sure to overlap, the edges of the film must be fixed with adhesive tape.

Of the features that distinguish a cold roof, it should be noted that it can be built for any climatic region. Many mistakenly believe that this type of roof is completely unsuitable for the northern region, but this is not so. It is here that a cold attic is a traditional solution for a residential building. The attic floor itself is insulated, that is, the use of a cold roof does not affect the internal microclimate of the upper floors. The attic itself may not even be used, since the installation of a layer of insulation between the upper floor and the under-roof space solves all problems regarding heat loss.

When constructing a cold roof, one should not forget about such a stage of work as the correct insulation of technological openings and exits. To do this, all ventilation shafts, chimneys, entrances to the roof surface must be insulated. This will avoid such troubles as icing, condensation, penetration of precipitation, heat loss.

To cover the roof of this design, you can use a variety of roofing materials. Most often it is a metal tile, the installation of which does not pose any problems. This option is considered optimal, since all laying work is carried out in the shortest possible time, additional work is not required. Other materials can be used for coating, for example, flexible tiles. But here a number of technological difficulties already arise that can make installation more expensive and complicated. Therefore, the use of a metal profiled sheet is preferable in this case.

Roofing pie under the metal tile

The device of a cold roof under a metal tile is one of the simplest options. In addition to load-bearing structures, such a roof includes roofing material in the form of metal tiles, a crate, and a waterproofing layer. The installation of such a roof is very simple: a waterproofing film is attached to the rafter system using a construction stapler or small galvanized nails. After that, it is pressed with self-tapping screws on wood, with which the counter-lattice will be attached, the step of which depends on the type of metal tile sheet. The size of such boards should be 25 by 100 mm, in some cases a continuous coating of plywood or chipboard sheets is used.

A waterproofing film (it can be a special PVC membrane or a polyethylene film) should be laid on the roof with a slight sag. At the same time, gaps and other defects are unacceptable on it. The level of sagging of the roofing film should be from 15 to 25 mm. This will ensure proper ventilation of the underside of the waterproofing, removal of condensate from it to the eaves, and then to the gutter. If this is not done, it will be subject to the negative effects of moisture, and this will lead to destruction.

When installing a cold roof made of metal, it must be remembered that the metal sheet and a thin layer of waterproofing do not provide adequate protection against noise, which can occur during heavy rain. It is for this reason that cold steel sheet roofs are rarely made without insulation, which acts as an excellent sound insulator. The cold attic therefore turns out to be unused.

The structure of such a roof includes the following mandatory layers:

1. From the side of the residential premises, first there is a layer of vapor barrier with one-sided permeability, that is, condensate is released from the room, but does not penetrate inside.
2. Roof truss system, longitudinal runs, that is Basic structure.
3. Waterproofing. The film should sag a little to allow condensation to escape.
4. A counter-lattice, the installation of which is carried out parallel to the installed rafters. The boards of the counter-lattice press the waterproofing, providing its additional fastening.
5. The lathing of the cold roof is made of a wooden beam, the cross section of which is most often 50 by 50 mm. Its installation is carried out in increments of 35-45 cm along the slopes. The step may vary, as well as the material for the crate, it depends on what type of metal tile is used, what slope for the roof was chosen.
6. Sheets of metal tiles.

What else is required?

To install a roof with such a design, it is necessary to take the most simple tools and materials that are not very expensive. Besides wooden planks for the construction of the rafter system, battens and counter battens, a vapor barrier, a waterproofing membrane, and the estimated number of metal tile sheets should be prepared. Staples, galvanized nails, self-tapping screws for wood and metal are used as fasteners. When calculating steel sheets it must be remembered that various additional elements may be needed, for example, ridge tile, valleys, cornices and more.

The device of a cold roof differs from a warm one in that in this case a layer of insulation is not used, that is, there is no layer of insulation between the vapor barrier and the waterproofing membrane. Such roofs are applicable in the case when the attic space under them is not used.

Any roofing material is not perfect. Even in its main quality - protection from moisture. And in cases where the roof is impeccably covered, and there are no leaks during rain or snow melt, there is still condensation on the inside of the roof.

To protect the rafter system and the attic of a cold roof from condensate, waterproofing is laid as part of a roofing pie. And the fact that it also protects against “small” leaks is a bonus in the form of a margin of time to eliminate roof leaks.

In what cases is waterproofing under a cold roof necessary?

There are not so many roofing materials. If we consider only, the list will be reduced to a few species. And depending on the characteristics of the material itself, the laying technology and the purpose of the building, waterproofing is not always needed.

metal roof

Metal roofing can be sheet and piece. Sheet materials are , . Piece covering - roofing checker and roofing scales.

Regardless of the size of the element and the laying technology, the “layered” is the same for everyone:

• rafters;
• waterproofing;
• a counter-lattice to provide a mandatory ventilation gap;
• crate;
• roof.

The presence of waterproofing and ventilation gap of the under-roof space is mandatory for heated houses for year-round use, and for unheated dachas or outbuildings.

Any roofing metal has high thermal conductivity and low heat capacity. With a daily decrease in temperature, the roof cools down much faster than the air inside the attic. And it will appear almost daily, even in summer.

In winter, if the building is heated, the air in the attic will be even warmer - any thermal insulation of the ceiling is not absolute. Just like any vapor barrier, it does not provide complete protection against the penetration of warm air vapor into the attic from the room. And there are chimneys and ventilation ducts which also serve as a source of heat.

Waterproofing protects the attic and truss system. And so that the counter-lattice and crate do not get wet, there must be a ventilation gap in the under-roof space.

Slate and ondulin

Although these materials are different in composition, the likelihood of condensation on their surface is low.

Slate is best in this regard. Its surface texture can be compared with an anti-condensate waterproofing film. A rough surface can retain condensate until the condition of evaporation and weathering occurs. Therefore, for a cold slate roof, waterproofing is not needed.

An example is apartment buildings Soviet-built - in most "Khrushchev" slates are laid on the crate without waterproofing. And the only reason an attic gets wet is roof leaks.

Ondulin has almost the same properties. On the manufacturer's website, as one of the "economy" options for installing a cold roof, a laying diagram without waterproofing is given. And this option is suitable for country houses and cottages for seasonal living, summer kitchens and outbuildings.

For houses permanent residence a roof made of slate and ondulin without waterproofing is considered insufficiently reliable. And here it is recommended to lay waterproofing roll materials. standard - the film is attached to the rafters with a slight sag, the beam of the counter-lattice is stuffed on top and.

Roof tiles

There are several types of roofing material where this term is present:

Bituminous tiles. Waterproofing is provided at the level of installation technology from the manufacturer. This, which serves at the same time as an additional fixing element. The bitumen contained in the tiles and the carpet is sintered together when the roof is heated from the sun.

Composite tiles. This is a kind of metal tile with a small sheet size. The differences are in the composition of the protective and decorative layer. As for any metal roofing it needs to be waterproofed.

Ceramic and cement-sand tiles. They differ from each other in composition, shape, manufacturing technology. But despite this, the installation takes place according to general principles. And manufacturers of these types of roofing also specify the presence of waterproofing in the description.

What waterproofing materials can be used

There are three types of modern materials:

superdiffusion membranes. Differ in good waterproofing properties and high vapor permeability. In cold roofs, they are rarely used due to the high cost and excessive "breathing" properties. The main purpose is to protect the insulated roof. They are laid on uninsulated roofs if there are plans for its further insulation and or an exploited attic.

diffusion membranes. Good waterproofing properties and average vapor permeability. The optimal choice for slate, ondulin, ceramic and cement-sand tiles.

Waterproof films with anti-condensation surface. This is a versatile material that has high waterproofing properties and limited vapor permeability. Such materials can also be used as a vapor barrier.
Recommended as . They block most of the water vapor in the warm air, which is then vented through the eaves and ridge ventilation of the attic and through the dormer window.

How to properly install film

The waterproofing film is mounted from the bottom up with an overlap of panels of at least 15 cm. Fastening is carried out to the rafters. Between the rafters, the film should sag, but not more than 2 cm. Additionally, a sealing tape is glued on top, and then a bar of counter-lattice is nailed.

If it is necessary to increase the length of the canvas, then the junction should fall on the rafter leg. The extension is also done with an overlap of 15 cm.

The superdiffusion film on the ridge is laid without tearing. When installing other types of waterproofing materials in the area of ​​\u200b\u200bthe ridge, a “gap” of about 5 cm should be left on each side.

Can ruberoid be used?

Sometimes as waterproofing pitched roof roofing material and its analogues are used. But these materials are intended for waterproofing a flat roof over a continuous floor.

V technological map TechnoNikol company for the installation of bituminous roll materials indicates that the fastening of the roofing material to the base occurs with the help of mastics or fusing.

Mechanical fasteners at large angles of roof slope are used as an additional "point" fixation to prevent slipping bituminous waterproofing in hot weather. And this limits the scope of the use of roofing material on pitched roofs.

On those roofs where the slope angles are large and the roofing technology is solid, the crate is not needed, it is not economically profitable to arrange it, even though the roofing material is cheaper waterproofing films. And only mechanical fasteners along the row crate do not provide sufficient fixation reliability due to the low tensile strength of the roofing material.

Currently, when building a private house, specialists use all kinds of roof structures, but most often they install a cold roof. This perfect option when the attic is not planned to be used as a living space. Below we will talk about how to properly install a cold roof from a metal tile.

The advantages of this option

The device of such a roof is quite simple - you will need to build a structure, lay a layer of waterproofing, crate and counter-lattice, roofing. The main thing, when erecting a cold roof, is to provide a ventilation gap for the possibility of removing condensed moisture. This is necessary so that the supporting structure and roofing material do not deteriorate under the influence of moisture.

By itself, the installation of such a roof should not be accompanied by complications in the process of work, it is only necessary to correctly fix the roofing so that it does not let precipitation through the joints into the under-roof space. Before creating a roofing pie for a cold attic, you should complete the entire list of calculations, determine the slope of the slopes, the pitch of the crate, and choose the appropriate method for fixing sheets of metal tiles.

What is a cold roof

The technology of a cold roof made of metal tiles involves the initial construction of a truss system, after which a membrane and a plastic film will be laid on it to ensure. They fill the counter-lattice, the crate and lay the roofing in the form of a metal tile.

Such a roof is characterized by the fact that it does not need to lay thermal insulation - all that is required is to equip ventilation outlets under the ridge and on the slopes to remove moisture. Make sure that all preliminary calculations are made as accurately as possible.

Roof installation has the following features:

1. If over time you plan to equip warm roof, then the choice of membrane for protection against moisture must be careful. If it is planned to equip the attic, then a PVC membrane must be present.
2. If in the future it is not planned to insulate the roof, then it will be necessary to lay microperforated waterproofing, which is used specifically for cold roofs. Thermal insulation cannot be laid with such a film, however, in case of further insulation, it will be necessary to purchase a new membrane. V otherwise in the future, the roof will lose its protection from moisture, the insulation will not have time to dry out, and the roofing material will begin to rust over time.

Installation steps

Let's figure it out so that it lasts a long time. When laying the membrane to protect against moisture, it should be borne in mind that it should remain with a slight sag, somewhere around 20 mm. In this way, it will be possible to achieve a runoff of condensed moisture, thereby protecting the rafter system and other roof elements from decay. To enable water to evaporate in time, without stagnation and thus creating hostile environment, care should be taken to include a ventilation gap in the project, which is located between the moisture-repellent film and the roof ridge.

This implies that the clearance will allow air flows to easily circulate in the space under the roof, removing all condensate. The installed membrane must be free of ruptures and other damage. To fix it, it is best to use a construction stapler. The layers of the membrane are laid with a slight overlap, and its edges are sealed with adhesive tape.

The structure of the roof with a cold attic is such that it can be used in regions with any climatic features. Quite a few people think that given type roofing is not applicable for the northern regions, although in fact this is not the case. Often in such regions, cold attic space. The attic itself is insulated, and the cold roof in no way affects the internal microclimate of the upper floors. You don’t even need to use the attic, because laying a layer of insulation between the upper floor and the under-roof space eliminates all the nuances that affect heat loss.

When installing a cold roof made of metal tiles, it is necessary to take care of thermal insulation ventilation holes, chimneys and access to the attic. In this case, it will be possible not to worry about the accumulation of condensate, icing, heat loss, or leakage of rain and melt water.

A cold roof can be covered with almost any roof covering, however, metal tiles, due to the ease of installation, are used much more often. Some other types of roofing materials, in particular soft roofing, are also well suited in this situation, but they require a lot of time and money during installation.

The structure of the roofing cake for metal tiles, including waterproofing

Covering a cold attic with a metal tile is the most convenient and easiest way to equip a roof. In this case, the roofing pie will consist of a waterproofing material laid on the rafter frame, battens and roofing (metal tiles). Actually, the laying of such a coating is carried out very quickly, the main thing is to understand correctly. The insulating film is fixed with staples or nails, then it is additionally pressed with a counter-lattice screwed with self-tapping screws. The lathing of the battens is carried out taking into account the dimensions of the metal tile. The board for the crate is taken with dimensions of 25-100 mm, and sometimes plywood or particle boards are used if continuous flooring is required.

Laying a film or membrane for attic waterproofing is done freely, with some sagging. However, it is worth making sure that the integrity of the coating is not violated, that is, any holes or cracks are excluded. As a rule, the film can sag by 15-25 mm. Thus, ventilation of the inner side of the waterproofing membrane is achieved, removal of condensed moisture to the eaves and further to the drain is ensured. Neglect of such simple rule will eventually provoke premature deformation of the roof frame and the entire roof.

The peculiarity of a metal roof is such that the film for a cold roof is not able to reduce the noise level that occurs during intense rain falling on the metal. Therefore, living quarters with such roofing are provided with a layer of thermal insulation that absorbs strong noise. Without such a layer, only non-residential attic spaces are usually equipped.

So, a cold roof will include the following layers:

• From the inside of the room, a vapor barrier is laid for a cold roof, which only releases moisture to the outside and prevents it from penetrating into the living rooms.
• Next, install the truss frame for the roof.
• The next layer is mounted waterproofing material. The film is laid with sagging to drain condensate.
• Next, a counter-lattice is attached, which presses the waterproofing, fixing it, and provides ventilation gaps.
• Then the crate is stuffed to fix the roofing. It is made of slats 50 × 50 mm and is laid along the slopes with an indent of 35-45 cm. Based on the type of roofing and the slope of the slopes, the step of the crate and the thickness of the board for it may vary.
• The last is the metal tile flooring.

Tools and consumables for a cold attic device

It is noteworthy that the installation of metal tiles does not require too complex professional construction tools. You can use the elementary set that every man has in his household.

In addition to lumber for the truss frame, battens and counter battens, an insulating membrane or film for vapor and waterproofing is required, as well as a sufficient number of metal tiles purchased from one lot.

All elements are fastened with brackets, self-tapping screws, galvanized nails and even anchor bolts. However, it is worth remembering that they must be of high quality so that the roof does not begin to collapse ahead of time.

As for laying roofing, in addition to profile sheets, ridge elements, valleys (internal and external), eaves and wind strips, as well as snow retainers and gutters will be required.

The main difference between a cold roof and a warm one is the presence in the latter of a layer of insulating material placed between the layers of hydro and vapor barrier. It is advisable to perform a cold roof only if the attic will not be used as a living space.