SNiP roofing from corrugated board - installation rules. Insulated corrugated roof

Today, roofing with a profiled sheet is probably the most popular and affordable solution in our country for covering both residential buildings and non-residential buildings.

The design of the roofing from corrugated board must be carried out in accordance with SNiP roofing - corrugated board, in which the height of the waves is from 20 mm and above. At the moment, the modern market gives you the opportunity to choose roofing corrugated board - the photo of which is presented below, both galvanized and polymer-coated.

This instruction for the installation of corrugated roofing reveals all the necessary information in order to properly install the roof from corrugated board. Professionals of the company from which you will buy roofing corrugated board will be able to calculate the roofing from corrugated board - you can safely provide installation to qualified specialists from the same company or do the work yourself.

The technology of installing corrugated roofing is actually simple and entertaining. So do-it-yourself corrugated roofing will give you pleasure if you have the necessary tools and the desire to tinker a little.

Transportation of corrugated roofing

For proper loading, profiled sheets must be laid on a flat and solid base with a margin of length for bundles of profiled sheets so that the edges do not bend.

During transportation, it is required to protect the material from mechanical damage and movement along the vehicle.

Avoid sudden braking and acceleration of the car.

Loading and unloading of products

Loading and unloading of packs with corrugated board must be carried out using lifting equipment (crane) with soft slings, and if the length of the packs exceeds the length of 5 meters, use traverses.

During unloading by hand, it is best to attract a sufficient number of workers (based on: 1.5-2 m of sheet length per person), but there should be at least 2 people.

They lift and carry sheets of corrugated board very carefully and only in an upright position in order to prevent strong bends in the material.

It is strictly forbidden to throw sheets of roofing material, and then try to drag them.

In order to start roofing work, the corrugated board must be moved to the roof.

You can lift the sheets onto the roof if you use logs installed from the edge of the roof to the ground.

Lifting up must be done one sheet at a time and slowly.

Also, do not risk starting the lifting of the sheets in strong winds, because there is a high probability of damage to the profiled sheets during this process.

control measurements.

When installing rafters, it is advisable to perform control measurements of the roof slopes, because. during construction work there is always a possibility of deviation from the approved project.

Check:

Determine the squareness of the roof slopes by measuring the diagonal of the slopes (the difference in the diagonals should be within 20 mm, but no more).

The flatness of the roof slopes (this is a cord, level), as well as the maximum deviation of 5 m ± 5 mm.

IMPORTANT! If you notice a deviation from flatness, then because of this, misalignment of the sheets is possible.

Installation of corrugated roofing, compliance with safety regulations

When moving along the sheets (during installation), it is necessary to wear soft shoes, step only into the deflection of the corrugated board wave in those places where the crate is located. When laying roofing corrugated board - fastening is performed by screwing them into the recession of the wave.

To prevent corrosion, such places as chips, cuts, damage to the protective coating must be treated with a special enamel for polymer coatings from AkzoNobel.

The edges of the sheets can be sharp, so always use gloves when doing the job.

The resulting chips, when screwing in the screws, are carefully removed with a brush, as they are prone to rust and can ruin the roof covering.

When performing any work, remember the need to comply with safety and labor protection rules.

Products with a protective film must not be used after installation. The film must be removed during installation to avoid its "sintering" with the polymer coating.

If contaminated areas of the coating have formed, then try to clean them with a soft brush and wash with a mild soapy solution.

It is strictly forbidden to use angle grinders with abrasive wheels (in other words, “grinders”) because not only the polymer coating of the corrugated board is burned, but also the zinc itself, after which the metal corrosion process is initiated.

Metal cutting tool

A special nozzle for a drill with interchangeable knives included. They will give a conventional drill the function of slitting electric shears for cutting steel to approximately 0.8 mm.

Cutting shears with a set of replaceable knives. They will be needed for manual cutting of steel with a thickness of up to 0.6 mm.

Lever scissors. Required for manual cutting of metal sheets up to 0.6 mm in any direction.

Cutting electric shears. Cutting steel sheet up to 1.2 mm will accelerate several times.

Gutter system tool

Pincers "Corrugation". They are needed in order to make corrugated folds at the ends of the drainpipes, ensuring their docking.

Strip bender It is designed for high-precision bending of gutter holders of gutter systems up to 4 mm.

Sealant gun. They are used for uniform application of a layer of sealant, performing a roofing device from corrugated board, as well as a drainage system.

Screwdriver attachment. It is used for screwing self-tapping screws 4.8 and 5.5 mm in size (with a hexagonal head) into wooden roofing units from corrugated board.

Staples type No. 10 for a staple gun and the gun itself. Required for fixing hydro and vapor barrier.

Riveting pliers. They connect products with rivets.

Template for the crate. For accurate marking of the batten pitch during installation.

Knife for thermal insulation. It is needed for the implementation of high-quality and accurate cutting of heat-insulating plates.

Another roofing tool that can be auxiliary to the main one: a hammer, a drill, a tape measure, a set of drills, a long rail, a marker, a cord.

Roofing cake for corrugated board - high-tech thermal insulation

Approximately 24% of the heat in a house is released through the roof into the environment, so accurate calculation and a balanced approach are required to insulate it. The technology of corrugated roofing provides for the creation of a heat-insulating layer of the roof. Together with waterproofing, it forms a roofing pie for corrugated board, which performs a protective function.

It is also necessary to correctly select a certain thickness of the thermal insulation layer and protect it from moisture. When the thermal insulation gets wet (even within 5%), all its thermal performance cutting is reduced by almost 2.5 times. Such a loss leads to freezing of the roof, icing, damage to the interior decoration, the appearance of frost on the outer covering of the roof, the formation of fungi and mold, rotting of the rafters and battens.

Ways for moisture to get into the insulation:

Normal evaporation from the indoor area;

Collection of condensate from the inside of the roof covering;

Various installation defects.

Roof insulation from corrugated board

Insulation of the roof of the attic floor

A special Tyvek Solid waterproofing membrane is laid on the rafters.

Thermal insulation is installed under the waterproofing in the plane of the rafters.

From the inside (from the room), the thermal insulation is protected by a vapor barrier membrane or film, in which the joints must be hermetically glued.

The room itself - the attic is sheathed with wood, OSB or something similar.

In order for the mixing of air flows to occur effectively, it is necessary to make a “cold triangle” under the roof ridge. Such a device will allow you to install under-roof ventilation outlets not for each rafter span, but after two or three. Condensation formation on the cold bottom surface of the sheets can be reduced by providing air movement from the eaves to the ridge between the two elements: the waterproofing membrane and the roofing.

Thanks to this organization of the ventilation process, there is no interference with the influx of "street" air through the slots in the filing of the eaves and through special ventilation outlets (and for air outlet under the ridge). To protect the installed thermal insulation from moisture, waterproofing and vapor barrier membranes and films are used, thereby creating conditions for ventilation of the entire under-roof space of the roof.

Cold roof. Non-residential (attic) premises

A waterproofing film or a TS (Tyvek Solid) membrane is laid along the rafters.

Thermal insulation must be placed horizontally along the ceiling of the room, so the attic remains cold (non-residential).

From the inner room of the house, the thermal insulation is protected by a special vapor barrier membrane or film, in which the joints must be hermetically glued.

To organize the ventilation of the attic, you need to ensure the flow of air from the street through the cracks in the filing of the cornice, and make it out through the dormer window and under the ridge (or through the ventilation outlets intended for this).

Warm roof: installation of waterproofing

Installation of waterproofing after laying the roof with corrugated board

For the option of a warm roof, waterproofing membranes are used.

For example, the Tyvek Solid membrane is mounted with the marking outward, Tyvek Soft is easily installed on either side.

Before installing the main waterproofing in the valleys, a roll of the waterproofing membrane is opened from top to bottom along the entire length of the valley.

The rolls of the main waterproofing along the length of the rafters are rolled out horizontally (avoid sagging), starting at the eaves and up to the ridge with the required overlap of 150 millimeters so that the junction of adjacent rolls falls on the rafter section.

Warm roof: installation of thermal insulation

Installation of thermal insulation

Upon completion of the installation of waterproofing between the rafters (namely, in the spacer), mats or thermal insulation plates are installed.

During this, there is no need to make a gap between the thermal insulation and the Tyvek membrane.

If you need to install in several layers, then the thermal insulation is laid with a noticeable overlap of the seams of the previous plates that were laid.

In order to cut thermal insulation boards more accurately, better and faster, it is recommended to use a special knife for cutting thermal insulation.

Warm roof: installation of a vapor barrier film

From the bottom up, on the inner surface of the rafters, sheets of vapor barrier films H96 Silver, H110 Standard are attached with a conventional construction stapler.

They are overlapped, and then hermetically connected with a connecting tape SP-1.

Slots and passages through the vapor barrier film must be carefully sealed.

After all of the above, you can install the inner lining.

Warm roof: OSB filing

OSB filing

When performing the inner lining of the attics, an Oriented Strand Board with an increased moisture resistance parameter is used. The recommended thickness is 9, and sometimes 12 mm.

OSB is fastened using nails of 50-70 millimeters to the rafters (supports), in increments of 200-300 mm. The distance from the edge of the OSB to the driven nails is from 10 mm or more.

Cold roof: installation of waterproofing

For cold roofs, both the Tyvek Solid waterproofing membrane and D96 Silver waterproofing films (D110 Standard) are used. Tyvek Solid films and membranes must be laid with the logo facing out. It is not recommended to turn the waterproofing material over, because of this, its properties are lost.

It is desirable to lay the films with an allowable sag (up to 20 mm) to ensure the condensate drain. If you use Tyvek Solid membranes, then this sag is not required.

A roll of waterproofing is rolled horizontally along the rafters. At the beginning, the cornice is taken and stretched to the ridge, but at the same time, overlap and fixation with falling wooden bars or with a counter-lattice is obligatory. The connecting joint of the rolls must be on the rafters.

Sheathing for roofing

REMEMBER! The crate is always laid on top of the waterproofing material.

The crate is made from wooden bars, pre-treated with an antiseptic, with a section of 50 × 50 mm and edged boards with dimensions of 32 × 100 mm (approximate ratios).

The counter-lattice is nailed to the rafters on top of the waterproofing film from the ridge to the roof eaves. It turns out a kind of falling bars 50 × 50 mm. Further, crate boards are horizontally attached to them.

For the installation of corrugated boards, the boards of the battens must be 32 × 100 mm. For roofing corrugated board, the crate is mounted with an approximate step of 500 mm.

In the areas of attachment of the valleys, under the roof fencing, around the chimneys, it is required to place a continuous crate.

Skate deck

Two additional boards are attached to each side of the ridge bar.

Sheathing at the ends of the roof

Boards with a height greater than that of a conventional crate by the size of the height of the corrugated board profile are attached to the end strips (technology requirement).

Roofing with corrugated sheet - the price of which is currently one of the most attractive among similar roofing materials - is the most suitable option both for individual construction and for the construction of warehouse and production facilities. Roofs where corrugated roofing was used, there are a huge number of their photos on the Internet and on our website too.

The cost of arranging a good roof is always quite high. They often make up about a third of the total construction costs. However, it is still possible to save a little when constructing extensions, houses or household facilities in this case. Shed roofs made of corrugated board are quite economical, they perfectly protect buildings from external influences, as they are able to withstand various weather conditions quite well. Yes, and you can make such a roof yourself, since the design is quite simple.

Before we talk directly about the construction of such a roof, you need to familiarize yourself with its advantages. This design is obtained quite light due to the simple system of rafters. And this indicator is relevant in the construction of buildings with far from powerful load-bearing walls. Therefore, this type of roof is often chosen during the construction of sheds, garages and other household buildings.

Also, one of the main advantages is the simplicity of the design itself, which allows you to do all the work yourself, without involving specialists. In any case, you will have to make a number of calculations required for design, but they are quite simple and you can limit yourself to a simple drawing.

On a note! Shed roofs can be mounted with or without an attic. If this room is not planned in the project, then the installation of this type of roof is greatly simplified. Here you can do without creating a rafter system, simply by mounting the top floor at a certain angle.

As noted above, such a roof is economical. For its arrangement, much less materials will be required than for the construction of even the simplest gable roof, since its area is smaller. And it will take not only a little corrugated board or boards for rafters, but also insulation, waterproofing and other materials. Although at the same time the area of ​​\u200b\u200bthe building can remain quite large.

Another plus of a shed type of roof is that it can withstand wind and therefore often built in regions where the wind load is critical. The main thing is to choose the right direction of the slope in accordance with the wind rose, which has long been determined by scientists in all areas of the globe.

The pluses include saving heat indoors- a pitched roof has exactly the shape that best affects air circulation, but at the same time a special zone is formed under it, where heated air masses accumulate, giving off their energy to the roofing materials and heating it.

Why is it recommended to cover such a roof with corrugated board? It's simple - this material is inexpensive, lightweight, easy to install, but at the same time durable and strong - the service life with proper installation is decades. Also, corrugated board can be purchased in absolutely any color, since the color range of the material is quite rich.

The main disadvantages of such a roof are the following:

• the need to clear snow masses in winter, since the slope of the roof is small and does not allow the snow to go off on its own;
• during rain, the corrugated board makes a lot of noise and if you do not provide good sound insulation, then it will not be easy to be under such a roof for a long time.

Calculation of elements

Before starting work, it is worth not only studying the materials used for construction in terms of their operational features, but also making the required calculations that will allow you to determine the roof structure and the amount of required materials and consumables.

First, the roof load on the foundation or walls is calculated. Everything is simple here - after all, calculations are made for a single slope, while for a hip or gable roof it would take longer to calculate the load.

In the case of a shed roof, you will need to use only two formulas. This is C \u003d Axtg (B), where C is the height of the wall, A is the length of the upper floor, B is the angle of the roof. The second formula looks like this: E \u003d C / sin (B), where E is the length of the rafters, C is the height of the wall, B is the angle of the slope. The step between the individual rafters is selected depending on the level of wind load and is usually equal to 50-80 cm. During the calculation, do not forget about the roof overhangs that will protect the walls of the building from precipitation.

Why is corrugated roof insulation necessary? The answer to this question is quite obvious. It is through the roof that approximately 25% of the heat is lost from the room. Therefore, the correct and effective insulation of the roof is a task of paramount importance.

Insulation of the roof from profiled sheet and reduction of heat loss through the roof allows to reduce the energy consumption spent on heating the air in the room. It is well known that warm air is lighter than cold air and rises under the ceiling of the building. That is why the insulated roof made of corrugated board allows you to make the conditions in the room more comfortable and significantly reduce heating costs.

Basic requirements for heat-insulating materials when constructing a warm roof from corrugated board

Vacuum is considered an ideal insulation, very close to it in terms of characteristics and the usual dry air surrounding us. Its thermal conductivity is 0.025 W/(m°C). It is this characteristic that is most important for any insulation. The lower the thermal conductivity, the smaller the thickness of the thermal insulation layer, the higher its efficiency and the lower the cost of roof insulation. For various modern heaters, thermal conductivity can range from 0.029 to 0.23 W / (m ° C).

Another important characteristic of thermal insulation materials is hygroscopicity, that is, the ability of the insulation layer to absorb moisture, as well as their vapor permeability. The latter characteristic determines the ability of the heat-insulating material to pass moisture contained in the air without retaining it.

The use of effective heaters allows you to create a "breathing" roof - just such a roof made of profiled sheet with insulation will provide the optimal level of humidity in the room.

In addition to these basic characteristics, thermal insulation materials differ from each other in compressive strength, resilience and elasticity. These parameters are selected depending on the conditions under which the insulated corrugated roof is operated. The most widely used for roof insulation are heat-insulating materials based on expanded polystyrene or basalt fibers.

When performing roof insulation from corrugated board, first of all, it is necessary to determine the thickness of the insulation layer. This calculation is quite complicated, since it is necessary to take into account a large number of factors - from the temperature coefficient of the area to the level of humidity. The coefficient that takes into account the necessary factors is called the heat transfer resistance coefficient for the roof and is denoted by the Latin letter R.

This coefficient has already been calculated for the administrative centers of the Russian Federation, and is shown in the table below. If you need to perform a calculation for another area, then you will have to use special regulatory documentation. In particular, . You can download it by right-clicking on the name of SNiP and selecting "Save as ...".

Calculated values ​​of the coefficient of heat transfer resistance of the roof for the cities of the Russian Federation according to SNiP 23-02-2003

Locality	Degree day	Heat transfer resistance for roofing, R,(m2x°C/Bt)
Arkhangelsk	5700	5.05
Astrakhan	3400	3.90
Anadyr	9000	6.70
Bryansk	4000	4.20
Bratsk	6900	5.65
Volgograd	3900	4.12
Vologda	5200	4.80
Vladimir	4900	4.65
Vladivostok	4600	4.50
Yekaterinburg	5600	5.00
Irkutsk	6500	5.45
Krasnodar	2400	3.45
Krasnoyarsk	5900	5.15
Kursk	4200	4.30
Magadan	7700	5.05
Makhachkala	2300	3.35
Moscow	4600	4.50
Murmansk	6000	5.20
Novosibirsk	6200	5.30
Omsk	6000	5.20
Orenburg	5200	4.50
Petrozavodsk	5200	4.80
St. Petersburg	4400	4.40
Salekhard	8300	6.35
Syktyvkar	5900	5.15
Tomsk	6300	5.35
Tyumen	5600	5.00
Ulan-Ude	6700	5.55
Khabarovsk	5800	5.10
Chelyabinsk	5500	4.95
Chita	7200	5.80
Yakutsk	10000	7.20

The table below shows an approximate calculation for the cities of Anadyr, Salekhard and Yakutsk. Due to the difficult climatic conditions in these cities, clarifying calculations are needed.

Comparison of the required thickness of various heaters under the same conditions

The thermal conductivity coefficient of the insulation can be viewed either on the packaging or in the accompanying certificate. I draw your attention to the fact that it is necessary to take exactly the coefficient with index B, which characterizes the use of the material in a humid environment.

According to technology, the device of a warm roof made of corrugated board depends on the design of the roof. A warm roof made of corrugated board can be pitched or flat. The technology for installing insulation in the first and second cases is somewhat different.

Insulated corrugated board on pitched roofs

Having made the necessary calculations and determined the thickness of the thermal insulation layer, we will solve only part of the problem. Next, we need to achieve the main thing - to create such conditions in which the selected insulation will be guaranteed to retain its properties and corrugated board with insulation will make our house warm and cozy.

The greatest danger for most thermal insulation materials is moisture. The basis of any insulation is ordinary air enclosed inside the granules or fibers of the insulation. That is why all thermal insulation materials are very light. After all, the smaller their specific gravity, the more air in the pores of these materials and the higher their thermal insulation properties.

But as soon as the heat-insulating materials are in a humid environment, their properties change dramatically. If the humidity of the insulation layer increases by 5%, then the thermal resistance, the main indicator of its properties, decreases by 50%, that is, by half.

The device of insulated roofing from corrugated board is most often performed from roofing insulation based on basalt fibers, which are produced in the form of rolls or slabs. Their disadvantage is that they can absorb moisture from the surrounding air.

Unlike these materials, polystyrene boards are not hygroscopic. But they are very fragile, combustible and can decompose at temperatures above 60 degrees. Therefore, polystyrene foam boards are relatively rarely used for roof insulation.

Where does this dangerous moisture come from and how can we protect our roof from it? There are two main reasons why moisture can get inside the insulation. The first is precipitation, that is, simply put, rain or snow. The second is condensation, which can form when a roof covering comes into contact with warm, moist room air on one side and cold outside air on the other.

First of all, the insulation is protected from atmospheric moisture by the corrugated roofing itself. In addition, when arranging the so-called “roofing cake”, a special substrate is used for corrugated board. Usually these are special vapor permeable membranes that allow water vapor to pass only in one direction. These membranes are laid on top of the insulation layer. It is such a substrate under the corrugated board that does not allow moisture from the outside to penetrate into the thermal insulation layer, and the moisture inside the insulation easily comes out.

The substrate under the profiled sheet is laid on top of the rafters and pressed against them with wooden blocks, 40-50 mm thick. They are mounted along the rafters and are called counter-battens. The crate to which the corrugated board is attached is mounted perpendicular to the rafters. Thus, a ventilation gap is created between the membrane and the corrugated board. The air circulating there also removes moisture from the roofing, and the substrate under the corrugated roof always remains dry.

From below, the profiled sheet with insulation is protected by a hydrobarrier. This is the name of a polyethylene film reinforced for greater strength with fiberglass. It is she who protects the insulation layer from moisture in the warm air of the heated room. For better ventilation, it is recommended to leave a gap of 2-3 cm between the hydrobarrier and the insulation.

Multi-layer laying of insulation on an exploited flat roof made of corrugated board

The first method is called single-layer conditionally. Since thermal insulation boards are produced with a thickness of not more than 100 mm, they are always laid in several layers. But in a "single-layer" installation, all insulation boards have the same density.

With a two-layer method, the top layer of heat-insulating plates has a high density, and, therefore, a large load capacity. At the same time, the plates of the upper layer distribute the load on the roof over the entire layer of thermal insulation. This method of laying allows you to make exploitable roofs that can easily support the weight of a person.

After the installation of the boards, a bitumen or PVC roofing is laid on top of the thermal insulation layer.

A non-professional can also lay a roofing cake under corrugated board. The process is quite simple and entertaining.

Characteristics of corrugated board

The main distinguishing feature of corrugated roofing is the technology of its manufacture. For the production of such a roof, galvanized metal sheets that have undergone "cold rolling" processing are used. In order to prevent corrosion processes, the sheet is coated with a special material. The profile of the product can take a trapezoidal or wave shape. The color of the sheets is chosen depending on their area of ​​​​application. Among the standard colors of the profiled sheet, there are:

• Grey;
• Blue;
• Red;
• Brown;
• Green.

The thickness of the sheets is chosen depending on their area of ​​​​application. Bearing corrugated board is necessary for arranging ceiling slabs, coupled with a concrete screed, on top of which roll roofing material is laid. The thickness of the sheet for corrugated roofing ranges from 44 to 114 mm. There are also special roofing sheets, the profile height of which is from 35 to 75 mm. They are designed to be mounted directly on the roof of a building. Experts recommend mounting such sheets with a slope of 12 degrees.

Composition of roofing pies

Before proceeding with the arrangement of the roof using corrugated board, you should familiarize yourself with the features of the future design. First of all, pay attention to soundproofing. Metal sheets located on the roof will give you a wide variety of sounds in any kind of precipitation. For this reason, a layer of insulation with a thickness of at least 15 cm is placed under the crate. An insulated attic floor alone will not be enough to ensure high-quality sound insulation, and the use of polymeric materials will not at all provide the desired effect.

When installing a roof from corrugated board, specialists collect a “pie” from:

• truss system;
• Control gratings;
• plate insulation;
• Waterproofing substrates;
• Lathing under the profile sheet;
• Roof profiled sheet.

The counter-lattice should be located above the rafter system. It serves as a base for laying a rolled row of insulation (in the case of a pitched roof). The slope of the roof of corrugated board, which is 20 degrees, is considered the smallest. When it comes to a gable, hip, multi-gable type of roof, then plate insulation is used. It is placed between the bars or rafters. The plates are installed by surprise if the thickness of the insulation is incommensurable with the distance of the rafters. In the presence of a metal truss truss, they additionally mount a counter-lattice for insulation, by analogy with a pitched roof.

The waterproofing layer of the corrugated roof must be laid on the roof insulation. Its main task is to exclude the possibility of moisture entering the structure. As soon as the waterproofing layer is prepared, you can proceed with the installation of the crate under the profile sheet, taking into account the gaps for ventilation.

Features of fastening elements

Work begins with the installation of a cornice strip, which should be located below the waterproofing layer. After that, the sheets of metal are stacked one on top of the other.

Installation is carried out taking into account the characteristics of a particular object. If the slope of the roof is insignificant, then the overlap is performed in two profiles.

When the master uses special seals, the overlap is carried out in one profile. When the slope of the roof is significant, the use of seals is abandoned.

The arrangement of hip roofs deserves special attention. In this case, the sheets begin to be laid, starting from the central part of the hips and moving towards the edges. It is necessary to control the accuracy of the location of the sheets. For this, the masters use an ordinary stretched rope.

The size of the cornice overhang is from 350 to 400 mm, which must be taken into account during installation.

The sheets are first fixed with one self-tapping screw, screwing it into the central part of the canvas. This is necessary to be able to adjust the overlap. After that, two canvases can be fastened at the bottom, maintaining a distance of 500 mm between adjacent self-tapping screws. The sheets are fastened into a comb by overlapping using self-tapping screws.

It is equally important to securely fix the profile sheets along the bottom of the structure. To do this, fasteners are placed along the ridge, through one profile and along the cornice overhang. For one square meter of the area of ​​\u200b\u200bthe profile sheet, there should be 5-6 self-tapping screws.

Features of roofing material

Decking has become one of the most popular materials for roofing, as it has a democratic cost and ease of installation.

The corrugated roofing pie is unpretentious, so even a non-professional can handle it. Other advantages of the building material cannot be ignored.

The developers of the SNiP, dedicated to the arrangement of the roofing pie, paid increased attention to the parameters of the layers of heat and sound insulation. They are the main components of the roofing pie. The regulatory documents clearly indicate that the installation of the crate can only be started after the installation of insulating materials. The impressive dimensions of the sheets allow you to reduce the number of support beams and speed up the work.

The durability of the structure largely depends on how accurately and correctly the distances between the longitudinal and transverse beams are calculated. Calculations are carried out taking into account the dimensions of the sheets of corrugated board and the size of the overlap.

The average overlap value, which is adhered to when installing corrugated sheets, is 10 cm. They try not to deviate from this value.

The lathing structure is most often made of bars with a thickness of about 3 cm. Such elements can easily withstand the weight of the structure and the specialists who will install the roofing pie. When assembling the crate, it is necessary to provide additional stiffeners. This condition is not considered mandatory, but its observance allows you to give the structure additional rigidity and extend its service life.

The main feature of the corrugated roofing pie is the ease of subsequent repairs. If necessary, you can dismantle the damaged canvas and replace it with a new one. A more budgetary way to restore the roof is to fix a small patch by welding.

There are no standardized pitch values ​​that should be followed when installing roof battens.

It is necessary to focus on the chosen slope of the roof and the design features of the rafters.

Tables have been developed for competent calculation. Which allow you to determine the exact values ​​of the parameters.

When carrying out installation work, it is imperative to provide gaps between the surface of the roofing material and the insulating layers. The gap value is also not a fixed value. Most often, the value of this parameter is equated to the thickness of the beams of the crate. Sometimes builders leave more impressive gaps. The value of this parameter is also influenced by the type of design of the edge of the roofing pie.

Choice of roof gaps

Builders consider the ideal slope of the roof, which is 20 degrees. It is not always possible to achieve this parameter due to the design features of the building.

For this reason, experts are guided by the generally accepted table of minimum slopes.

Due to its unique characteristics, corrugated roofing pie is applicable for slopes from 7 degrees. It should be remembered that such a slope is permissible only when arranging premises for household and industrial purposes. In residential buildings, the roof should have a slope exceeding 10 degrees.

Decking is considered one of the best materials for arranging a roofing pie. Its excellent performance, combined with affordable cost, makes consumers refuse to work with other building materials.

In modern construction, a huge number of different materials are used, which perfectly combine a high level of quality with performance, as well as functionality and economy. The presence of a complete set of these advantages is one of the main requirements for modern building materials, which can be safely attributed to corrugated board. It is widely applicable as a facing material. And the installation of corrugated roofing, made in compliance with all technological processes, will create a practical and durable roof.

What are the characteristic features inherent in such material as corrugated board? First of all, it is a way of its production. For its manufacture, galvanized steel sheet is used, on which cold rolling is applied. A special coating that prevents corrosion is applied on both sides of the profile - wave or trapezoidal. This coating can have different shades.

Depending on the purpose, corrugated board is distinguished: bearing, wall and roofing. Each of these groups of material has its own wave height, metal thickness and designation.

For roofing work, you should choose a corrugated board with the letter designation "H" or "NS". The latter, by the way, is a universal material and can be used as a wall option.

The device of a roof made of corrugated board involves the use of corrugated board, which has a height of at least thirty-five millimeters. If the roof has a short slope length, then it is possible to use corrugated board with a lower wave height.

Use of roofing material

The technology of roofing from corrugated board, according to SNIP, involves the use of corrugated board, which has a height of forty-four millimeters. Roof profiles have an aluminum or zinc coating with an additional polymer layer that performs a decorative or protective role.

The base for corrugated board can be wooden bars or metal girders. The bearing capacity of the base depends on the wind strength inherent in this climatic zone and the expected load of the roofing material on the roof of the building. In addition, in order to adjoin the profiled sheet to the wall system, the corrugated roofing device provides for the presence of aprons made of galvanized steel sheets and coated with a polymer layer.

Finishing of roof gaps is carried out using roofing elements of a shaped type, which have a comb similar to a cross-sectional profile. In addition to eaves, gutters and ridges, other elements are used in the construction of the roof structure: special plugs, snow barriers and ridge seals.

Profile sheets can be used both for cold roofing in the form of piece elements, and as part of a warm multi-layer roofing as a whole sheet.

Basic rules for installing corrugated roofing

The laying of profiled sheets must be carried out in strict compliance with certain rules. First of all, this is a complete security and following the installation technology in the processes of lifting the material and subsequent movements along the roof, as well as fixing the base material.

Raising the corrugated board to the roof is carried out with the help of a log by two workers, a third person takes it upstairs. At the same time, no more than one sheet is lifted at a time.

If there is a strong wind outside, the work on raising the corrugated board should be postponed for a while!

To move on the roof, you should wear shoes with soft soles and you need to walk on it, trying to step into the deflection between the waves. To do this, lay the corrugated board in such a way that the deflection is tightly adjacent to the grate. Since the edge of the material is quite sharp, for your own safety, work must be done with rubber gloves.

Laying profiled sheets overlap. The size of the overlap directly depends on the angle of the roof. The lower it is, the more overlap. For a flat surface, the material laying technology is somewhat different. In this case, the sheets must be applied in two corrugations to prevent moisture from entering under the roofing.

Chips that form when fastening profiled sheets with self-tapping screws from screwing them in must be removed with a brush. Otherwise, the rust that forms on it over time will greatly damage the roof.

If products with a protective film are used, then in order to avoid its “growth” with the polymer material, it must be removed during the installation process.

Roofing cake - keep warm and protect from noise

Using corrugated board roofing for the roof of your house, it is very important to create good heat and sound insulation, since the house “gives off” more than 20% of the heat to the environment through the roof. And with such a task, a special heat-insulating layer that performs a protective function, called a roofing pie, does an excellent job.

What does the roofing pie under corrugated board consist of? The first layer on the counter-lattice, installed on top of the truss system, is laid insulation.

Please note that the roof slope of corrugated board must be at least 20%.

The next component of the roofing pie is the waterproofing layer. It is necessary so that water does not flow through the joints of the sheets and at the junctions. On top of the waterproofing, in compliance with all ventilation gaps, a crate for a profiled sheet is installed, which is laid on it with the last layer.

All layers of the cake are interconnected and perform a specific functional task. An error in the technology of at least one layer can lead to a decrease in the service characteristics of the entire roof and its service life. The following situations may indicate that the roofing cake was assembled incorrectly:

• ceiling leak;
• Heat loss;
• Condensation formation;
• Frost.

If quality work has been done to install thermal insulation, it can guarantee minimal heat loss through the roofing and prevent surface condensation.

Installing a special wind barrier made of roll-type vapor-tight material will help to avoid blowing through the roof.

The seal performs two main functions. Firstly, it limits the heating of the roof space. And, secondly, it creates good sound insulation in the room. The vapor barrier layer solves the issue of moisture getting from the room into the roofing pie. And the waterproofing "stuffing" of the cake protects the insulation from the penetration of condensate into it, which usually forms along the bottom of the profile sheets.

When laying a waterproofing film, it is necessary to observe the distance between the rafters, on which it lies no more than 120 centimeters.

Lathing for profiled sheets

The crate is an obligatory element in the device of a roof from a professional sheet. For shed roofs, wooden bars of the following sizes are used as a crate: 5x5 cm, 3x10 cm, or 3x7 cm. Lathing elements are laid in increments of 25 cm. If the angle of inclination of the slope does not exceed 15 degrees, a continuous crate made of plywood is used, OSB boards or boards. Lathing for gable roofs is mounted in increments of 50 cm.

For roofs that have a complex geometric shape, in the grooves and valleys it is impossible to close the crate closely, you need to leave a gap for ventilation of 5 cm. The roofing device from corrugated board imposes a requirement that the bottom plank should have an entry under the profiled sheet at a distance of 25 cm.

If ventilated or chimney pipes are provided in the roof structure, an additional crate will be required.

Fastening sheets together is an important stage in the roofing process.

Particular attention when installing corrugated roofing should be paid to fastening the sheets to each other. After all, the nodes of the roof from the profiled sheet are the most important point in this work. Negligence towards the nodes located at the joints of the sheets can significantly affect the performance of the future roof for the worse. The process of laying the sheets itself does not cause difficulties, much more time and effort is spent on the places of their connections.

The main purpose of corrugated roofing units is to create insulation for the transitions of a horizontal surface to a vertical one and, of course, to connect the profiled sheets to each other. Therefore, their implementation should be approached with great care.

When creating adjacency nodes, the following actions are performed:

1. To prevent the ingress of dust and moisture at the junction, a bar is installed, under which a seal is arranged;
2. A groove is created in the wall, which is inserted into the groove and then fixed with dowels and coated with a layer of sealant;
3. The bar is connected to the profile by means of a self-tapping screw, which is screwed into the maximum protruding point of the wave.

Making a roof ridge from a profiled sheet

The device of a roof from a professional flooring also implies the presence of a ridge, the design of which occurs at the final stages of installation.

Ridge elements are also laid with an overlap of 200 mm. With the help of self-tapping screws, they are attached to the upper corrugation. Self-tapping screws should be selected, taking into account the height of the profiled sheet wave. And the step to be followed when fastening is 300 mm.

If the roof has a slight slope, then the use of a sealant will be relevant. Thanks to it, it becomes possible to eliminate the ingress of moisture in the event of an oblique direction of precipitation. Between the ridge and the seal, the right solution would be to leave a small ventilation gap.

It is best to start the installation of the ridge from the side of the roof that is less exposed to rain.

The importance of proper installation

The service life of the roof of the house can be maximum if the corrugated roofing is made according to all the rules for competent fastening of sheets and factors such as:

• possible influence of wind;
• probability under the influence of high temperatures of expansion in the center of the sheet;
• sufficient density at the connecting points of the profiled sheets.

Compliance of the material fastening process with all existing standards is achieved by using certain sizes of self-tapping screws for each type of work. For example, the connection with the crate should be provided by self-tapping screws 4.8x35 mm, but the fastening of the ridge will not do without longer self-tapping screws - from 80 mm.

Easy roof repair

One of the clear advantages of such a roofing material as corrugated board is the speed and ease of its installation and dismantling. Therefore, when repairing a roof from a profiled sheet, there are no particular difficulties.

In most cases, roof repairs can be limited to removing one or more unusable sheets and replacing them with new ones. If the damage is very minor, then replacement of the sheets may not be required - in this case, patching will be enough.

When choosing roofing material for the roof of your house, you should pay special attention to corrugated board. After all, this is not only a convenient option for installation and further operation, it is also a material that has an attractive appearance and affordable price.