The presence of stiffening ribs located in the protective metal layer makes the roofing sandwich panels a sufficiently durable material, which allows it to withstand a snow load of up to 150 kg per m 2 and ensure effective water runoff from the roof of the house. Due to reliable thermal insulation, such material can be used in any climatic zone of Russia. It is for these reasons that roofing made of sandwich panels is in high demand among developers. In order for the coating to serve for a long time and reliably, it is necessary to strictly follow the installation technology and the norms of SNiP.

roof pitch

According to the SNiP standards, the minimum slope of roofing sandwich panels is 5°, but on condition that the coating is made of continuous panels without joints along the length and there are no windows or other structures in the roof that violate the integrity of the finish layer. Otherwise, the minimum slope angle must be at least 7°.

When choosing the type of roof construction and the angle of its slope, you should pay attention to the climate in the construction area. If precipitation is frequent, it is recommended to make a roof slope under a sandwich panel with a slope of at least 40 ° - in this case, rainwater will not linger at the joints. In regions with a dry hot climate, the best option is a roof with a slope of 7-25 °.

It must be immediately taken into account that a steeper roof requires more roofing material.

If the slope is insufficient, moisture will stagnate on the roof, which negatively affects the waterproofing of the panel joints. During thaws and frosts, the accumulated water, turning into ice, can damage the outer protective layer of the panel and begin to destroy the metal of the shell.

The minimum roof slope of sandwich panels does not require the use of additional fasteners when installing the material on load-bearing structures made of wood, reinforced concrete or metal. If sandwich panels are laid on a structure with an inclination of more than 7°, it is required to install additional connecting fasteners.

Tools and materials for installation

Installation of a roof made of sandwich panels requires trimming the material, fixing it, and sealing the joints. Material cutting can be done:

• electric scissors;
• fine-toothed saw for cold cutting;
• stationary machine with a circular saw.

A grinder with an abrasive wheel or hot cutting tools should absolutely not be used.. Heating the cut will cause deformation of the panel, damage to its decorative and protective layer, which will eventually lead to corrosion of the material.

To move the sandwich panels from place to place without the risk of damaging their surface, it is recommended to use a mechanical or vacuum gripper. In places where the gripper is installed on the panel, the protective film should be removed from it.

Fastening of roofing sandwich panels is carried out using long self-tapping screws made of stainless or carbon steel, equipped with washers and sealing elements. Synthetic rubber seals (ethylene propylene diene monomer, EPDM) are required to seal the attachment point. The length of the screws depends on the thickness of the panel and the material of the structure to which it is attached. To tighten the screws, an electric drill with speed control or a screwdriver is used.

Do not over-tighten the fasteners - this will reduce their service life. In addition, a “tightened” self-tapping screw can damage the panel.

It is important to correctly determine the required number of fasteners, taking into account:

• wind load on the object (depending on the height and location of its location);
• object type (closed/open);
• in which area of ​​the roof the attached panel is located (the outermost panels are most exposed to wind load);
• bearing capacity of one fastener.

For accurate calculations, it is advisable to contact a specialist.

Joints between panels must be properly sealed. Gaps must not be allowed in the longitudinal joints.

How to do the work correctly, you can learn from the video instructions:

Regardless of the angle of the roof, the longitudinal joints are sealed with a special tape (for example, Abris Lb 10x2) or silicone sealant. Sealing tape is also necessary when arranging junctions to vertical structures.

Features of roofing material

Sandwich panels are an easy-to-install material suitable for roofing. Manufacturers offer a wide range of plates that differ in purpose, size, strength, filler. Can be used as a heat insulator:

• polyurethane foam;
• expanded polystyrene;
• polyisocyanurate;
• mineral wool.

The panels have a relatively small weight and at the same time perform the function of a finishing coating and insulation. The highest thermal insulation performance of sandwich panels with basalt wool.

A decorative and protective polymer coating is applied to the thin sheet metal from which the panel body is made. This allows you to paint the panels in different colors and protect the metal from corrosion.

In order not to damage the protective layer, the installation instructions for roofing sandwich panels require certain rules to be followed:

• do not use hot and abrasive cutting;
• the protective film from the bottom of the plate should be removed immediately before the installation of the element, and from the top - after the installation of the entire coating;
• carefully remove the metal chips formed during the cutting of the material and make sure that it does not scratch the polymer layer;
• in the process roofing works walk on the roof only in shoes with soft soles.

Sandwich panels when stored outdoors should be protected from precipitation, dirt and wind. The material is laid on a flat, solid base to avoid its deformation.

Conditions for installation work

Installation of roofing sandwich panels is carried out under certain conditions:

• wind speed should not exceed 9 m / s, since the panels have a relatively low weight with a large surface area;
• work is not carried out during rain, snow or thick fog;
• if not provided artificial lighting, with the onset of twilight, the installation stops;
• sealing of longitudinal joints between sandwich panels is carried out at an air temperature above +4 °C.

Before starting roofing work,:

• verify the design, its compliance with the project and the quality of installation, eliminate the identified differences and shortcomings;
• check the compliance of girders, crossbars and other structural elements with the project;
• check for flatness the runs on which the panels will be attached;
• prepare tools.

Mounting technology

Sandwich panels are laid across the girders parallel to the eaves. The smaller the installation step of the purlins, the higher the bearing capacity of the mounted roofing will be. This is especially true for roofs with a slight slope in regions with high snow loads. But in any case, the distance between the runs should not exceed 2 meters.

If the slope of the roof from sandwich panels exceeds 15°, additional stops are installed on the overhangs so that the panels do not slide down.

It is most convenient to mount the roofing from slabs, the length of which does not exceed 10 meters. Firstly, it is easier to lift them onto the roof, and secondly, in this case, the likelihood of thermal deformations during the operation of the roof is lower.

Sandwich panels are mounted on top of the heat-insulating and waterproofing layer. As a heat insulator, it is easiest to use mineral wool. Before installing the panels, the horizontal installation of the girders and the condition of the supports made of wood, metal or reinforced concrete are checked. It is necessary to remove rust, mold, and other layers. Cracks are sealed in the tree, cavities are leveled in concrete with mortar. The joints of the elements from which the frame is made must be airtight. Wooden structures are treated with a fire-retardant composition, and metal structures with an anti-corrosion one.

The step of the arrangement of the supporting elements of the frame must correspond to the dimensions of the panels.

The width of the frame span should be selected so that the panels can be fastened five centimeters from the edge, and there is also a support for fastening the joined panels.

It is required to work in a respirator if the insulation in the panel is mineral wool. When lifting the slabs onto the roof, you can not put them on the lock so as not to deform it.

The installation technology of roofing sandwich panels prescribes to start laying the material from the lower corner of the roof (any). Next, the plates are mounted in a vertical direction. It should be taken into account in which case it is easier to perform work and more economically consumed material.

Roofing sandwich panels are a convenient modern material for covering roofs of any area. They appeared on the construction market relatively recently, but builders are willing to use them in their work because of a number of qualities:

• Ease of installation: sandwich panels are mounted without any extra physical effort, and the process takes relatively little time,
• Light weight with a large area: this is both an advantage and a disadvantage, because the panels are easy to carry, but the wind easily removes them from their place,
• Good heat and sound insulation,
• fire resistance,
• Appearance: With sandwich panels, home, garage, store and any other building get a personality of decoration and make passers-by pay attention to its organic design.

Why do you need a slope?

Making a roof slope means going to increase costs. The higher the laying, the more material is needed to cover the area. But since you can save money on this, is it worth it at all to make a bias and spend extra money?

Firstly, a roof made of sandwich panels has special installation conditions in the SNiP standards, and ignoring them will be a mistake and bring trouble.

Problems when erecting the wrong slope

Ignoring or ignorance of the rules for laying roofing from sandwich panels will bring trouble to the owners of the building in the form of:

• Rapid material wear and quality deterioration,
• Stagnant waters that will begin to bloom
• waterproofing failures,
• Presentable loss.

Right choice

The minimum slope is selected according to the climatic environment of the building and the laying characteristics. For a dry climate with hot air and constant solar exposure, when the roof is made of solid panels without transverse joints and openings, choose the minimum slope allowed by the rules of SNiPs - 5 °. If there are connections or skylights, then a greater slope is required.

All solutions for choosing slopes are indicated in the table. Four positions reflect the minimum performance, but building solutions in different occasions hesitate. If the laying is carried out by a non-professional with a special education, then there is no question of other solutions.

Roof sandwich panels
All solutions for choosing roof slopes from sandwich panels are indicated in the table.

One of FAQ for the installation of panels - what slope of the sandwich panels is acceptable for the roof. The fact is that the updated version of SNiP II-26-76 Code of Rules 17.13330.2011 "Roofs" (Table 1.), which shows the preferred slopes of roofs depending on the materials used, does not give an answer about sandwich panels. The material closest to the sandwich panels that appears in the Code of Practice is a profiled metal sheet. For this position (galvanized steel, color coated, stainless steel, copper, zinc-titanium, aluminum sheet) is set to "greater than or equal to 12%", i.e. greater than or equal to a 7° angle.

“The lack of a regulatory framework in this case is a significant barrier to providing the facility with roofing panels. The fact is that 90% of projects with pitched roof apply a slope of 10%. In this regard, we recommend making a slope of at least 10% when installing the roof from our sandwich panels,” said Vladimir Rodionov, Head of the Bureau technical solutions and service JSC "Teplant".

The optimal slope value will increase the life of the roof by reducing the load on the sandwich panels.

In Soviet times, a lot of buildings were built in the style of the so-called Stalinist Empire style, where pomp was combined with monumentality and austerity in an amazing way. Architects often used columns, diamond-shaped colossi, and upward-looking shapes in their projects. Such buildings have been preserved throughout the country and are still in operation, despite the solid wear of the structures. In Ufa, a striking example of such a building is the Salavat Yulaev Sports Palace, which for several decades was the home arena of the hockey club of the same name.

On June 28, the annual scientific and practical conference was held at Teplant. This year it is held for the 5th time! In 2017, most of the projects were presented by financial, commercial services and customer service; this year, production workers excelled.

Alexander Rogachev joined the Teplant team in 2010, and in 8 years he has grown from the head of a legal bureau to the director of logistics and procurement. The young top manager told how his department works and what tasks he and his colleagues will solve in the very near future.

What slope is acceptable when installing roof sandwich panels?
What slope is acceptable when installing roof sandwich panels? One of the most common questions about the installation of panels is what slope of sandwich panels is acceptable for the roof. The point is that updated

The best option for BMZ is a roof made of three-layer metal sandwich panels completely ready for installation: it does not need additional insulation, is easy to install, cost-effective, has an aesthetic appeal, and is unpretentious in maintenance.

Reliable roofing is a combination of high-quality roofing sandwich panels at a bargain price, accurate calculations and proper installation!

Roof pitch made of sandwich panels

For guaranteed water drainage when the roof is iced, the slope of the roofing slopes should not be less than:

• 5% for roofs assembled from solid panels without cross joints and skylights,
• 8% for roofs assembled from panels connected along the length and in the presence of skylights.

At the same time, one should not forget about the minimum pitch and width of the roof supports. It is recommended to check the compliance of the support with the preferred characteristics. It will not be superfluous to take into account the data on the maximum permissible loads.

Proper installation starts with proper transport and storage. It is at this stage that the risk of damage to the panels and a decrease in their quality characteristics is high. To avoid mistakes, please read:

The panels must be mounted on thermal rubber bands glued along the entire length of the supporting element and adjacent structures. In the longitudinal joints and in the overlaps of the panels of the transverse joints, sealant must be laid, preferably butyl rubber tape. The use of silicone sealants is not permitted.

When laying panels longer than 12 m, it is permissible to use a transverse beam - a traverse. It is allowed to use a single-tee or channel beam - the panel is suspended every 3-4 m.

The slope of the roof must also be taken into account to avoid damage to the edges of the panels.

Raising panels to the roof

In the process of laying roofing sandwich panels, the best option is to use a crane.

The lifting of individual panels from the package one by one must be carried out using specially designed and widely available tools: a carpenter's clamp with a steel plate and a rubber or felt pad, a vacuum gripper.

Installation of roof panels: fastening to the run, ridge, ebb

First of all, with the exception of ridge roof purlins, with the help of one fastener, the panel is fixed to the purlin under the ridge.

The extreme panels are attached in the upper part of the trapezium to the run with three self-tapping screws, the middle ones - with two. Given the difference in loads in the above areas, the recommendations are conditional. The final number and type of fasteners is determined by the working draft.

Upon completion of the main installation work, it is necessary:

• between the ridge runs, mount the inner ridge bar
• polyurethane foam to fill the free space in the joints of the panels,
• when the foam hardens, install a profiled polyurethane gasket on both sides of the ridge,

In the case of using roof panels with mineral wool insulation, the joint is filled with a mineral wool sealing compound.

Proper organization of the tide is also important. To ensure proper drainage from the roof surface, the panels in the overhang are trimmed with a plank.

A heater is cut under the top skin of the panel, the bar is pushed through and attached to the bottom panel. The gutter hooks are attached to the plank, later the gutter pipes are inserted, preferably made of PVC.

Roof junction to sandwich panels

Mounting units, junctions of roofing panels, fastening of panels and decorative strips are carried out in strict accordance with the design documentation, the development of which is carried out by a specialized organization licensed to carry out design.

Standard units for panels of the AluTerm construction series are set out in the "Design Recommendations".

Roofing from sandwich panels: installation technology, minimum slope, junction points
Sandwich panel roof installation technology, diagrams of typical junction points, design recommendations, optimal roof slope angle and other recommendations.

Due to its simplicity, the installation of roofing sandwich panels is very popular. But it is the strength and durability of the material that depend on how correctly the transportation and installation work was carried out, whether the features of the technology for installing sandwich panels were fully observed during the creation of the roof.

Material feature

Ideal for roofing, sandwich panels are incredibly easy to install. When arranging a roof with their help, the customer is faced with a huge selection of plates, which differ from each other by many factors.

Thermal insulation boards are:

• polyurethane foam,
• polystyrene,
• polyisocyanurate,
• from mineral wool.

Perhaps the main advantage of sandwich panels for roofing is their light weight, but their main purpose is to perform the function of the final coating and insulation material. The best indicators for thermal insulation can be provided by models with basalt wool.

A very thin, but durable sheet material of the case is covered with a polymer coating that performs not only decorative, but also additional protective functions. Strong corrosion protection also provides the opportunity to choose different color variations of the roof.

What does the roof sandwich panel consist of:

• galvanized steel with a polymer coating - 0.5-0.7 millimeters,
• transparent polyethylene film that performs a protective function,
• trapezoidal insert made of expanded polystyrene,
• a labyrinth-shaped locking connection designed to drain water from the joints, so that the joints remain hermetically insulated,
• two-component adhesive, polyurethane, with extremely high adhesive properties,
• lamella, consisting of mineral wool, which is created on the basis of basalt fibers.

Thanks to all the perfectly matched components, a roof made of sandwich panels is an advantageous choice in all respects.

Choosing the right angle of inclination

The minimum slope when creating a roof is used quite often, but all joint venture installers must know the norms of degrees as unshakable dogmas, otherwise they become simple workers from masters.

Important! During the creation of roof drawings and the planning of work, it is necessary to take into account the future slope of the roof in order to correctly calculate the amount of material required.

According to the norms established by SNiP, the roof from the joint venture should have a minimum slope of 5 o.

This rule is valid only under the following conditions:

• the installation of the roof was carried out without joints and in length with solid panels,
• no skylights,
• there are no additional structures or decorative, functional elements that can affect the perfect integrity of the final layer.

Otherwise, the installation will be carried out in violation of the technology, and this will lead to the fact that the roof will not last for a long time or will leak.

If one of the points is violated, the minimum angle of the roof, mounted from sandwich panels, must be at least 7 o.

When planning the roof structure, at what angle the slope will be erected, first of all, the climatic features characteristic of the region in which the building is located are taken into account.

• in areas with frequent rains, the slope of the roof under the joint venture should be at least 40 °,
• dry and hot regions allow a minimum slope - from 5-7 to 25 o.

If in an area with high humidity to make the roof a minimum slope, excess water will accumulate on it, which will negatively affect the entire roof as a whole. These residues become ice in frosty time, and this can damage the protective coating and destroy the shell.

A slope exceeding an angle of 15 ° requires the installation of additional supports, otherwise the joint venture may move down.

Mounting Features

In the process of creating the smallest angle of inclination of the roof from the joint venture, no additional elements are used to fasten the base material to a wooden, reinforced concrete or metal structure. In the case of laying panels on a frame with a degree of inclination above the minimum, additional connecting fasteners are required for installation.

Despite the fact that the joint ventures are laid according to the technology from the lower corner to the upper, the method of forming the roof should not be laid horizontally, but vertically along. Otherwise, the integrity of the roof is at risk. In addition, it is easier to plan the progress of work in this way, and less material is used.

Important! The heater in the joint venture is mineral wool, which requires the obligatory use of a respirator by the master involved in the installation.

It is also worth noting that during the lifting of the JV onto the roof, it is not recommended to put the plates on the lock, otherwise it may deform, which will render the entire element unusable.

For roofing work, you should contact only experienced specialists who are competent in the installation of sandwich panels, since this material needs an individual laying technology.

The minimum slope of the roof of sandwich panels
Minimum slope of roofing sandwich panels Due to its simplicity, the installation of roofing sandwich panels is very popular. But it is the strength and durability of the material that depend

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Last revision: 26.10.2016

A modern roof structure cannot be perfectly flat, since precipitation in the form of snow or rain must be removed from its surface in any case. That is why, when installing flat roofs, it is imperative to follow the rule of the so-called ramping, which provides for a slight slope of the flooring to one side. The presence of such a slope allows you to drain rainwater from the surface of the coating and collect it at the roof fence, where special drain holes are prepared in advance for these purposes. The minimum slope of the roof, as a rule, is selected taking into account the following parameters of the roofing to be installed (at the same time, its performance is also taken into account):

• used roofing material;
• type of roof (classical or inversion);
• number of waterproofing layers;
• average annual precipitation (snow load);
• wind loads on the structure.

SNiP requirements

The dependence of the angle of inclination on various factors is regulated by special building codes and regulations (SNiP). Among the requirements for the slope flat roof SNiP II-26-2010 “Roofs”, the following provisions regarding its dependence on the coating material are especially important:

• depending on the type of waterproofing used, the angle of inclination of the roof can vary from 1.5 to 10º;
• angles of inclination of a larger value (up to 2º) are chosen very rarely, which is explained by the difficulty of selecting a soft coating that would not slip to the base of the roof at high air temperatures;
• the minimum slope of the so-called flat roof should be at least 1–1.5º.

Note! There is a certain relationship between the slope of the roof structure and the number of layers of waterproofing coating laid on it. The more significant this value, the faster precipitation will be removed from it, and, therefore, the number of waterproofing layers may be less.

The roofing materials used for covering the roof differ in their structure, according to which they have a more or less smooth surface. With an insufficiently smooth (rough) structure of the coating, the probability of retaining both water and snow on it increases markedly.

This is what determines the dependence of the minimum slope angle on the roofing material used. Next, we consider the specific values ​​​​of this indicator for various kinds coatings.

The smallest angle of inclination of the slope when arranging a tile roof is usually chosen at least 15º (for some material models, this value may be 14º). If necessary, reduce this figure, some manufacturers advise treating the joints of metal sheets with a special waterproof sealant that retains its properties at low temperatures.

Note! If the slope is too gentle, precipitation will linger in certain places on the roof and seep into the joints during heavy rains. And this will lead to an additional load on the roof in those areas where they are delayed.

It is possible to partially get rid of this disadvantage by using tile samples with a higher wave height.

When using this type of roofing, the indicator we are considering should have a slightly lower value (as a rule, it is 12º).

In the case of making roofs from a profiled sheet with a smaller slope, when laying them, it is necessary to observe the so-called two-wave overlap, and at angles of the order of 15º and above, an overlap of 20 cm will be sufficient.

At the minimum angle of the roof (i.e. when it is almost flat), a continuous batten should be used to increase the load capacity of the supporting structure.

There are several types soft roof, differing in the material from which they are made:

1. Flexible tiles. In the case of using the so-called soft roof as a coating ( shingles- in particular) the crate under it should be made in the form of a solid base made of plywood sheets (OSB). The minimum slope slope for this type of roofing is at least 11º.
2. bituminous coatings. For soft coatings of this category, the minimum roof slope has the lowest value (its value, as a rule, does not exceed 2º). But at the same time, as noted earlier, you will need to increase the number of layers to be laid. In the event that for technical reasons it is not possible to lay more than 1-2 layers of bituminous material, you will have to increase this figure to 15º. The minimum angle of inclination of a coating made on the basis of ondulin, as a rule, does not exceed 6º. This roofing material is the most preferred for low pitched roofs, but you will need a continuous batten to install it.
3. Clay tile (slate). When laying hard clay tiles or classic slate sheets, which have an uneven surface that holds snow well, the slope of the slopes must be at least 22º. At the same time, it is necessary to pay very close attention to the calculation of the rafter system, which, due to the large weight of the material, will experience significant loads. In addition, one should not forget about the additional loads on the rafters, which are possible with the accumulation of large amounts of snow on the roof, as well as with powerful gusts of wind in bad weather.

Taking into account all these factors, the requirements for the load capacity of the roofing system increase significantly.

Note! When making a roof made of tile or slate with a slope of less than 22º, you will have to recalculate the entire rafter system, since the loads on it in this case increase many times over.

According to the requirements of SNiP, the minimum slope of sandwich panel decking should be approximately 5º (provided that the coating is made continuous and has no joints along the entire length). Let us make a reservation right away that this indicator is valid only for cases where the roof does not provide for built-in windows or other elements that violate the integrity of the continuous coating.

In the presence of all these violations of the integrity of the flooring, the minimum slope of such a roof must be at least 7º.

Even at the design stage of a future roofing system (and, in particular, when choosing a roof construction option with a certain angle of inclination), it is imperative to take into account the climatic features of your area. In the event that precipitation in your area falls quite often, the minimum slope for the sandwich panel should be at least 40º, since only with such a slope of the roof will rain moisture not linger in the joints. Well, in areas with a small indicator of average annual precipitation, a slope of about 7–22º is considered optimal.

Note! Before arranging roofs with large slopes, it is necessary to take into account the fact that in this case you need more building material.

On the other hand, with an underestimated value of this indicator, water will accumulate on the roof, which over time can destroy the waterproofing seals of the panel joints. And in the off-season (during the onset of thaws and frosts), ice growths form from the accumulated moisture, which can damage the protective layer of the sandwich panels, as well as their metal shell.

With a small roof slope (less than 7º), there is no need for additional fastening of panels on a frame base made of reinforced concrete, wood or metal. On roof structures with a large angle of inclination, additional fasteners are required.

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Video

From this video you will learn how to make a roof slope.

The popularity of roofing sandwich panels is due to the simplicity of their installation. In order for the resulting structure to serve for a long time and reliably, it is necessary to carefully follow the recommendations for the transportation and laying of the material.

Determination of the minimum angle of the roof slope

There are the following SNiP recommendations: the roof slope of sandwich panels should not be less than 5 degrees. At the same time, only solid panels should be used for laying: such a surface does not contain joints, windows and other elements that violate its solidity. All other situations provide for a minimum roof slope of sandwich panels of 7 degrees.

When selecting the optimal roof structure and the degree of its inclination, the climate in the given region is taken into account. In areas with frequent and heavy rainfall for a roof made of sandwich panels, a pitched roof slope of at least 40 degrees is recommended. This will allow rainwater to freely descend, without stagnation at the joints. If the region has a dry and hot climate, the minimum slope for sandwich panels can be reduced to 7-25 degrees. At the same time, it must be remembered that the construction of steeper roofs will require a greater consumption of building material.

A flat roof made of sandwich panels will provoke moisture stagnation. In this case, negative consequences for the tightness of the butt sections cannot be avoided. When the thaw gives way to frost, this causes the accumulated water to freeze. Such processes damage the outer protective layer of the panel, and subsequently destroy the metal shell. If a supporting metal, reinforced concrete or wooden structure acts as a base under the roof, additional fasteners will not be needed when arranging a small roof slope from sandwich panels. If the minimum slope of the roofing sandwich panels exceeds the mark of 7 degrees, additional connecting fasteners are used.

Required equipment for installation

During the construction of the roof from sandwich panels, there is a constant need to cut the material to size. It will also need to be fixed and waterproofed seams. To cut the panels, you can use electric shears, a fine-toothed saw, or a stationary machine with a circular saw. It is better not to use a grinder or hot cutting devices, as the panels begin to bend due to heating of the cut line. This leads to a violation of the protective coating, due to which corrosion begins to appear.

When carrying sandwich panels, mechanical or vacuum grippers are usually used, which avoids surface damage. In those areas where the grips are installed on the panel, a special film is pre-glued. Long stainless self-tapping screws are used as fastening material for installing roofing sandwich panels. It is also necessary to have washers and special sealing gaskets. When choosing the optimal length of the screws, they are guided by the thickness of the panel and the frame on which it is fixed. It is more convenient to tighten screws with a screwdriver.

When calculating the required amount of fasteners, the following factors are taken into account:

• wind load on the building. This is influenced by its height, location and angle of inclination of the roof of sandwich panels.
• Features of the building (open or closed).
• Where in the roof structure is the element to be fixed. The outermost panels receive the greatest wind load.
• load bearing capacity of each fastener.

Accurate calculations must be performed by a qualified specialist, taking into account the SNiP minimum roof slope from sandwich panels. Joints between panels require special attention: there should be no gaps between them. On roofs with any angle of roofing from sandwich panels, a special tape of the Abris Lb 10x2 type is used for sealing. You can also use silicone sealant. All vertical connections are equipped in the same way.

Characteristics of sandwich panels

On sale are several varieties of material with different sizes, filler and strength index. Depending on their characteristics, the purpose of each type is determined. The inner insulation layer usually consists of expanded polystyrene, polyurethane foam, polyisocyanurate or mineral wool.

Sandwich panels weigh quite a bit, and can combine topcoat and insulation. The warmest are products with basalt wool. The body made of thin sheet metal is covered with a decorative polymer protection - thanks to this, the plates are given the necessary color design and corrosion protection.

In order not to cause damage to the protective layer during the laying of the material, the following recommendations must be followed:

1. The use of hot and abrasive cutting is completely excluded.
2. Protective film must remain on the bottom of the panel until it is installed. The top film is removed at the end of the work.
3. If metal chips appear when cutting the material, they must be brushed off immediately, otherwise they may subsequently scratch the polymer layer.
4. When carrying out installation work, it is allowed to use shoes with soft soles only.
5. If sandwich panels are stored outdoors during construction work, it is necessary to consider reliable protection against climatic influences for them. For laying the material, it is recommended to use a flat, dry area.

Features of the installation

SNIP roofing of sandwich panels requires the following conditions:

• It is advisable to choose a calm day for installation, since the area of ​​​​the panels is large, and the weight is small. Weak gusts of wind up to 9m/s are allowed.
• Do not operate in rainy, snowy or foggy weather.
• In case of poor lighting, the installation process should be stopped.
• In order to qualitatively carry out longitudinal compaction, the air temperature must be at least +4 degrees.

Starting to lay the roofing material, you must do the following:

• Carefully inspect the roof structure for compliance with its design documentation. If defects and installation defects are found, they must be eliminated.
• Check that all girders, crossbars and other structural elements comply with the project. To do this, you must use the building level.
• Prepare all fixtures and tools.

Laying order

Installation of sandwich panels is carried out in the transverse direction to the girders, which are parallel to the eaves. To increase the bearing capacity of the roof, the purlin installation step can be reduced. This technique is usually used on roofs with a small slope in areas with heavy snowfalls. In any case, this parameter should not be more than 200 cm.

First, slabs up to 10 m long are laid, since they are much easier to lift onto the roof. In addition, in this case, the risk of deformations due to temperature fluctuations during the operation of the coating is reduced by an order of magnitude. Before the installation of sandwich panels, insulation (mineral wool) and waterproofing are laid. You should also check the horizontalness of the runs and the condition of wooden, metal and reinforced concrete supports. All detected rust, mold and other deposits must be removed.

If in wooden elements There are cracks that need to be repaired. The same applies to cavities in concrete mortar. Sealing of all joints of frame elements is carried out. For the treatment of wooden surfaces, fire protection is used, for metal surfaces - anti-corrosion agents. It is very important that the pitch of the bearing elements matches the dimensions of the slabs. When choosing the width of the spans, they try to ensure that the material is fastened at a distance of 50 mm from the edge. The joining panels must also be well supported.

If mineral wool is used as thermal insulation inside the sandwich panels, it is necessary to protect breathing with a respirator. When lifting the panels onto the roof, it is forbidden to put them on the lock in order to avoid its curvature. It is best to start laying sandwich panels on the roof from any of the lower corners, adhering to the strict vertical installation.

Today we will talk about the building material, which until recently was considered purely wall. Currently, manufacturers offer its variety, which covers the roofs of buildings and structures. This is a sandwich panel roof. In the article, we will analyze issues related to the structure and composition of the material, its classification, as well as the technology of mounting on truss system roofs, taking into account some of the nuances of construction operations. You will understand the information received, you will, as they say, be on the same wavelength with the masters who were entrusted with covering the roof with sandwich panels.

Roof made of sandwich panels Source forza.uz

What is a sandwich panel

This is a three-layer material formed by metal sheets, between which a heater is laid. As thermal insulation, either expanded polystyrene, polyurethane foam or basalt wool are used here. The first two options are preferable due to their higher technical and operational characteristics.

As a metal sheathing, a galvanized steel sheet is used, coated on top with either paint or a polymer layer. This primarily increases the protective qualities of the steel sheet, prolonging its difficult operation on the roof. Secondly, this is a huge variety of colors, which allows architects and designers to solve some design problems.

At the same time, all layers are glued together with a special composition - a two-component polyurethane adhesive which gives the three-layer construction special strength. It should be added that steel sheets are not necessarily a flat surface. Today, manufacturers mainly offer roof sandwich panels for a roof with a profiled shape in the form of corrugated board. That is, with a trapezoidal shape or wavy.

Three-layer structure of sandwich panels Source pedkolledj.ru

Advantages of sandwich panels

The first advantage in the list of positive characteristics of this building material is a complete set of roofing in terms of insulation and waterproofing. That is, by mounting the panels on the roof, you solve the whole problem at once. It is clear with insulation, but waterproofing problems are solved by the bottom sheet of a galvanized sheet.

And others Benefits:

long-term exploitation with proper installation;

small specific the weight, and this is a decrease in loads on the truss system;

calmly withstands quite serious loads;

minimal deformation;

high sound and heat insulation characteristics;

high fire resistance;

elevated aesthetic quality;

rapidity roof assembly;

material practically not subject climatic features of the region.

We add to this list that the minimum roof slope of sandwich panels is 5 0. But with one condition that the panels will be selected taking into account the length of the run of the house. With a slope of more than 10 0, it is allowed to mount panels of various lengths, strictly joining them using a special technology.

And one more positive side. Sandwich panels are a universal material, so today they are used to cover roofs, regardless of the purpose of the building itself. Even for residential buildings.

High aesthetics of roofs made of sandwich panels Source st-taseevo.ru

On our site you can find contacts of construction companies that offer the service of designing and carrying out roofing, finishing and insulation of houses. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

Characteristics and dimensions

To begin with, this roofing material is produced by many manufacturers according to specifications. Although there is GOST under the number 32603-2012. True, the standard is intended for panels with mineral wool insulation.

So this document says that roofing sandwich panels, denoted by the letter "K" in the marking, should be produced with exact dimensions:

thickness 50-300 mm;

width- strictly 1000 mm;

length from 2000 to 14000 mm.

Many manufacturers strictly adhere to these requirements. But they offer longer panels if they are ordered. At the same time, instead of mineral wool, higher-quality heaters are used in terms of both strength and reduced thermal conductivity. It is polystyrene or polyurethane.

As for metal sheets, then, as mentioned above, this is a flat surface, trapezoidal, wavy and rolled. The latter are grooves either in the upper or lower wave, which act as stiffeners. Rolled panels are considered more durable roofing elements. By the way, rolling is done both on the lower steel sheet and on the upper one.

Standard dimensions of sandwich panels Source postroika.biz

On our site you can get acquainted with the most popular projects of houses, for the decoration of which sandwich panels and a ventilated facade were used - from construction companies presented at the exhibition of houses "Low-Rise Country".

And a few words about characteristics:

thermal conductivity depends on the type of thermal insulation material used: mineral wool 0.034-0.044 W / m K (depending on density), expanded polystyrene - 0.03-0.04 W / m K, polyurethane foam - 0.019-0.025 W / m K;

density- 40-50 kg / m 2;

life time- 50 years.

Mounting technology

Let's start with the fact that a roof made of sandwich panels is, first of all, a quick and fairly simple installation. But, as with all construction operations, careful preparation is required.

Preparatory stage

It includes:

accuracy check roof run planes, no drops;

strict perpendicularity between support posts and crossbars;

check tilt angle stingrays;

if additional waterproofing, then spend it.

Mounting Features

As already mentioned, installation is a simple process. But there are a lot of nuances in it, on which the quality of the final result depends.

To begin with, a metal truss system is laid under the roof sandwich panels. These are either steel standard profiles, or load-bearing elements made of galvanized sheet, imitating standard profiles. If the first option is used, then in the profiles it will be necessary to make holes for the fasteners in advance. If the second option is used, then small thickness galvanized elements are easily drilled with metal roofing screws, which are used to fasten the roofing.

Sandwich panels on the roof are lifted by a crane Source roofs.club

And one more thing related to the processing of the material. Often the panels have to be cut to length or width. Bulgarian can not be used. The speed of rotation of the cutting disc of the power tool is enormous. An elevated temperature zone is formed on the cut surface, which burns the zinc and polymer layer, exposing the metal. It is in the places of cut that the panels begin to corrode, which reduces their service life.

So, assembly operations algorithm:

Necessary prevent contact sandwich panels with supporting structures. Therefore, the latter, or rather, their contact surfaces, are covered with a sealing self-adhesive tape.

Crane panels lift on the roof, where they are laid, starting from either side of the roof structure.

Adjacent panels are connected by locking, which ensures complete tightness of the joint. Some manufacturers recommend additionally using silicone sealant for sealing, which is applied to the surface of the lock.

All panels fastened to the supports with special self-tapping screws, which have two threads: the lower one for fixing to the support, the upper one for holding the upper steel sheet. Self-tapping screws are equipped with gaskets made of neoprene rubber, which, under the influence of natural loads, does not change its qualities and properties throughout its operation.

Self-tapping screws for fastening sandwich panels to supports and to each other Source krepezhinfo.ru

It is very important to properly tighten the screws. First, they are screwed into the upper wave of the sandwich panels. Secondly, they cannot be overtightened, this will squeeze the gasket, which means it will slightly open the mounting hole for moisture to penetrate. By the way, it is also impossible to fall short for the same reason. Thirdly, the fasteners must be screwed exactly perpendicular to the plane of the roofing.

Since the interlock connection is practically an overlap, adjacent panels to be joined must be fastened together along the upper galvanized steel sheets. For this, short metal screws are used.

Video description

Watch the video, which shows how to properly cover the roof with sandwich panels:

Mounting with cross joints

If the length of the slope is large enough, and this parameter cannot be closed with one panel, then the laying of material with transverse joints is used. A very interesting technology is used here, which is based on the process of forming an overlap of two adjacent panels. It is done like this:

cut off the bottom steel sheet on the length of the overlap of the panel, which will be laid as the top element;

the same distance cut off and insulation;

only top sheet;

cut like this the panel is laid on the adjacent, covering part of the bottom panel with the remaining steel ledge;

two docking panels attached to supports, and overlap with small self-tapping screws with obligatory lubrication of the overlap plane with sealant.

Please note that if the slope angle is 5-10 0, then the overlap should be within 300 mm, if the angle is higher than 10 0, then the overlap length is 200 mm. Look at the photo below, which shows how sandwich panels are laid using this technology, and in what order they should be mounted on the roof.

Connection of sandwich panels along the length of the slope Source www.mpcomm.ru

In principle, on this we can assume that the sandwich roof is ready. It remains only to install additional elements. It is primarily a skate. A heat-insulating material is laid between the upper edges of the stacked panels, and the top is covered with a metal element painted in the color of the sandwich panels. If there is an adjunction of the roof to the protruding wall, then this joint is closed with the so-called flashing. This is an angular type profile, one shelf of which is attached to a vertical surface, the other to the surface of the panel, thereby closing the joint.

Roof ridge from sandwich panels Source rsp.spb.ru

Video description

The following video is about the types and characteristics of sandwich panels:

Conclusion on the topic

Today, roofing sandwich panels are one of the new generation materials in demand, especially in industrial construction. Ease of installation does not mean that this process can be carried out by illiterate and inexperienced craftsmen. It's not hard to mess up the panels. Therefore, it is very important to strictly follow the instructions provided by the manufacturers.