Roof decking from corrugated board. Detailed installation of corrugated roofing and do-it-yourself installation of a roof covering according to a lightweight scheme

When planning the construction of a corrugated roof, private developers assume that it will protect their house from bad weather for a long time and reliably. This will largely depend on the quality of the roofing material. At the same time, the long service life of the roof, to a large extent, is ensured by compliance with the rules for its installation.

There are several factors to consider when installing corrugated roofing. One of them is the overlap of sheets.

A number of construction specialists recommend laying sheets exclusively from right to left. However, this is fundamentally wrong. The laying direction should depend on the prevailing winds. That is, the joint of the sheets should be located on the predominantly leeward side. Thus, it creates additional protection from the ingress of moisture under the joint of the sheet during precipitation with strong winds. For example, one side of the roof is laid from left to right, and the other side is vice versa.

If the height of the roof slope exceeds the length of the profiled sheet, laying is done in rows, from bottom to top. Thus, the roof is covered to the full length, first in one row, and then, making a transverse overlap, the second and subsequent rows are laid.

The amount of overlap depends on the angle of inclination of the roof slope and on the height of the wave of the corrugated board. When using a sheet with a wave height of less than 20 mm, the side overlap must be at least two waves. In addition, the edge of the joint must be pre-treated silicone sealant. The overlap of corrugated board with a wave height of more than 20 mm must be carried out depending on the steepness of the roof. On gentle slopes, it can be made into two waves, and the joints can be treated with sealant. On roofs with a slope of more than three tens of degrees, the overlap is usually done in one wave. The joints do not need to be sealed.

The transverse overlap of the sheets also largely depends on the steepness of the roof slope. On sloping floors, in order to avoid water flowing into the under-roof space, building codes prescribe an overlap of at least 30 cm. And this is regardless of the height of the sheet wave. On steeper slopes, a transverse overlap can be made within 20 cm.

Most common mistake, performed when laying corrugated board, is an attempt to align crookedly laid sheets by slightly vertically displacing one or more of them. This happens when the first sheet is mounted crookedly, without using a laser level to control the position of its bottom edge. If you put the first sheet unevenly, all subsequent sheets will lay down with a ladder. To correct this error, inexperienced builders begin to shift the sheets in a vertical plane. At the same time, gaps are formed in the places of overlap, where moisture freely enters.

Decking is a commonly used roofing material that has a number of advantages. Experienced craftsmen know all the intricacies of working with him, but beginners in this field may encounter a number of problems. Laying corrugated board on the roof, the instructions for which are given below, is a rather simple process, but it is important to study it thoroughly before starting work, otherwise the roof may not be done correctly, it will start to leak over time and will not last the stated period.

Laying corrugated board on the roof - instructions

Decking, also referred to as a metal profile or profiled sheet, is a fairly thin sheet of steel, having a corrugation of an even geometric shape and coated with polymeric protective agents. It is made by cold method on special profile bending machines. The material is intended for use in construction various structures. Depending on the type, it can be used for finishing walls, creating formwork when working with foundations, building fences, and also for decorating roofs.

The professional sheet differs from other roofing materials in a number of advantages. It is strong, reliable, durable, does not burn, has a rich colors and can be matched to any style of the house. This material can cover roofs of any shape - shed, having two or more slopes, and also having an unusual shape. Its installation is quite simple, and the material is convenient and practical in care.

Decking can be of various sizes. The length of one sheet varies from 2 m to 12 m, and the thickness is in the range of 0.35-1.2 mm. But, having agreed with the manufacturer, you can order sheets according to individual requirements.

Prices for corrugated board

Work requirements

For the arrangement of roofs, it is recommended to buy corrugated board with a complex polymer coating. It consists of several layers, where the lowest one is represented by galvanization and chromium, then there is a primer layer, and after that a paint and varnish polymer composition is applied. Due to such a coating, the material does not rust, but it is important to remember that when cutting the profiled sheet, this layer is damaged, therefore it is necessary to treat the cut points with protective compounds, otherwise the roof will quickly rust. Also for this reason, you need to move along the profiled sheet only in soft shoes and very carefully so as not to spoil the coating.

For roofing, corrugated board of different brands can be used, but usually it is purchased universal or wall with the marking C, H or HC. At the same time, when buying material, it is important to pay attention to the shape of the corrugation (a wave or a trapezoid is best suited for arranging a roof), its height (21-35 mm) and the thickness of the steel sheet itself.

The choice of the type of coating is greatly affected by the angle of inclination of the future roof, as well as the type and characteristics of the manufactured crate. And the length of the profiled sheet should ideally be such as to close the slope from the ridge to the eaves at once - the tightness of the roof will be higher.

As a base for corrugated board, a wooden crate can be made, while the tree must be treated with an antiseptic. You can also use a metal crate made of steel girders, but in this case the height of the corrugated part of the metal profile should not be less than 4 cm.

Be sure to take care of laying layers of hydro and sound insulation. The latter is needed in any case, especially if a residential building is covered with corrugated board, since during rain the metal coating is quite noisy. Waterproofing is required so that even with modest installation flaws or heavy rain, water does not get under the material. The vapor barrier layer will reduce the effect of condensate that forms in houses and accumulates under the roof on the corrugated board. You also need to think about the organization of ventilation of the under-roof space, otherwise the incoming moisture will not be able to be removed from under the roof.

What will be required?

For the installation of corrugated board on the roof, you will need to rent or purchase a number of tools, without some of which the work will most likely simply not work. So, you will need a screwdriver, metal shears, a hacksaw or a jigsaw, a hammer, a building level, and measuring accessories.

Of the materials, you need to buy the corrugated board itself, as well as additional elements and fasteners. Do not forget about waterproofing, insulating layers, material for the construction of battens, etc. A sealant is also purchased, which will make the joints impervious to water.

Fastening of a professional flooring is carried out by means of special self-tapping screws with rubber sealants. Their dimensions are selected depending on the height of the corrugated part of the sheet, and the number - based on the roof area to be sewn. The length of the self-tapping screw D is calculated by the following formula: D \u003d P1 + B + P2, where P1 is the thread included in the crate (about 2.5-3 cm), B is the height of the corrugated part, P2 is the thickness of the washer and seal (about 4 mm). The number of self-tapping screws per 1 m 2 is about 5-7 pcs.

Table. Dobory for a roof from a professional flooring.

Prices for popular models of screwdrivers

Screwdrivers

Laying corrugated board: instructions

Step 1. Laying corrugated board involves a series of preparatory work, which will allow you to create the right roof cake and a quality base for the material. waterproofing material mounted on previously installed rafters, starting from the bottom of the roof slope along its eaves. Laying is done with a slight sag, which will avoid tearing the coating in case of sudden temperature changes. The individual strips of material are always laid overlapping each other, the edges below the laid strips must be hidden under the edges laid above. The overlap is at least 10 cm. The joints are glued with adhesive tape. Lathing boards are mounted on top of the waterproofing film with the selected pitch.

Table. Lathing step depending on the type of material and the angle of inclination of the slope.

Step 2 The first sheet of corrugated board is lifted to the roof with the help of a rope and other people, and the master, who is on the roof, accepts it.

Step 3 A rail is laid on the skate across it, which will be called the control rail. When laying sheets of material from their edge and up to it, there should be 6 cm of free space.

Step 4 The first sheet of corrugated board is aligned in accordance with the end and cornice parts of the roof. If the appropriate strips are installed there, then you need to focus on their edges. The removal of the sheet should be approximately 30 cm.

Step 5 If the sheet is long enough to close the roof slope from the ridge to the eaves, then it is simply fixed in place with the help of roofing screws equipped with seals. If the dimensions of the sheet are small, then the laying will be carried out in stages: the first sheet is fixed on a self-tapping screw, the second and third are laid, also fixed. But, until the sheets are exactly aligned, fixing should be easy. Only after the final alignment, the material is securely attached to the crate with self-tapping screws.

Step 6 In this case, the sheet is enough to close the roof slope completely in width. Therefore, fixing with self-tapping screws is carried out immediately - they are screwed along the perimeter of the material into each corrugation, along the end - in increments of 50 cm. In the middle of the sheet, fixation is made into every second corrugation. In this case, the screws are screwed into the part of the sheet lying on the crate, and not into the protruding one.

Step 7 The second sheet of corrugated board rises to the roof and fits in the same way as the first, but with an overlap on the previous one in 1 wave. Fixing is done in exactly the same way.

On a note! It is best to screw the screws in a checkerboard pattern.

Step 8 Similarly, one roof slope is completely sewn up.

Step 9 In the same way, corrugated board is laid on the second side of the roof.

Step 10 The installation of the ridge bar is in progress. It is installed in its intended place - at the junction of two sheets in the area of ​​\u200b\u200bthe ridge - and is fixed with self-tapping screws in increments of 20-30 cm. The second ridge element is laid with an overlap on the first (the overlap should be 10 cm). Fastening is carried out on the upper crest of the roof.

Advice! Between the ridge element and the roofing sheets, experts advise laying special seals so that the roof is as tight as possible. But you should not forget about the ventilation gap.

Chimney bypass

Step 1. Around emerging from the roof chimney a metal sheet is mounted - a kind of junction bar.

Step 2 The gap between the sheet and the pipe wall is filled with sealant.

Step 3 A sheet of corrugated board is cut out in the shape of the perimeter of the chimney. Places of cuts must be treated with protective equipment.

Step 4 The cut sheet is applied in place.

Step 5 The sheet is fixed with roofing screws in the same way as ordinary sheets.

Step 6 A box is created from the profiled sheet, suitable in shape to the chimney.

Step 7 The box is put on the pipe from above.

Step 8 The box is fixed on the pipe with the help of roofing screws.

Step 9 The joint between the box and the laid profiled sheets is closed with a metal plate fixed with roofing screws.

Step 10 A small roof for a chimney is made from trimming corrugated board and fittings.

Snow guards are necessary in order to prevent snow avalanches from the roof in winter period. They are mounted parallel to the roof eaves at a distance of 40-50 cm from its edge. Fastening is carried out using roofing screws. Snow guards can be mounted in one row, or two, in a checkerboard pattern.

Prices for snow guards

Snow guard

Video - Installation of corrugated roofing

As you can see, the installation of corrugated board is really simple and consists in clearly fulfilling the basic requirements for working with the material. To make a roof on their own is now within the power of every master.

Comfortable and cozy living can be provided only by high-quality roofing material, which will protect the roof from leaks, and the entire structure from destruction.

In terms of strength and durability, steel is the leader among roofing materials, but this material has a significant weight. Under the influence of a heavy coating rafter system may weaken and deform. The method of corrugating steel sheets helped to solve the problem. As a result, even sheets of large size began to have a small weight. Wherein strength characteristics and the stiffness of the material remained unchanged due to the formation of a trapezoidal profile. Such material became known as corrugated board.

Practicality in use, as well as minimal harm to the environment in a short time, has made corrugated board a very popular material.

The main characteristics of corrugated board

Profiled sheets are obtained by cold rolling hot-dip galvanized steel. During the manufacturing process, the material is treated with protective agents in several layers, thereby increasing the strength and durability of finished products. First, an anti-corrosion phosphate is applied to the steel sheet, then the surface is primed. After that, a polymer mixture is applied to the front part, and the lower part of the sheet is covered with a special varnish.

The result of the actions performed is a high quality material with a long service life. High-quality corrugated board has a large number of advantages, but it also has negative aspects.

Among the positive characteristics of this coating, the following can be distinguished:

• Long operating period.
• A price that beats most competitors.
• Minor weight.
• Easy assembly and dismantling in a short period of time.
• Resistant to sudden temperature changes.

The disadvantages of the profiled sheet include poor noise absorption, which to some extent worsens the sound insulation.

Material classification

Decking is widely used not only as a roofing material.

Before installing corrugated board on the roof, you should familiarize yourself with its classification:

• H is the best roofing material for covering surfaces and ceilings. May be used as fixed formwork. The strength and reliability of the material is ensured by additional stiffeners, a special thickness and height of the profile.
• C - material used mainly for the construction of fences. The cost of such a coating is slightly cheaper, but the quality characteristics are in many ways inferior.
• HC - is considered a combined material that can be used as a roofing, but with extreme caution. First, the roof should not be subjected to significant loads. Secondly, the slope must have a good slope. Only in this case can fatal consequences be avoided during operation.

Determining the angle of the roof

In order to correctly install the corrugated board on the roof, it is necessary to determine the angle of inclination of the roof. The value of the overlap on the adjacent sheet depends on its value:

• Laying sheets on a roof with a slope of 12 to 15 degrees is carried out with an overlap of 20 cm.
• With a slope of 15 to 30 degrees, the overlap should be 15-20 cm.
• Increasing the angle of inclination to 30 degrees reduces the overlap of sheets to 10-15 cm.

The laying of corrugated board on a roof with a slope of less than 12 degrees should be accompanied by additional sealing of the joints with silicone sealant.

Installation of corrugated roofing

To perform a high-quality installation of a profiled sheet on the roof, instructions from experienced builders help.

Material transport

It is necessary to transport corrugated board on a flat surface in order to prevent strong kinks.

When unloading mechanically, soft slings should be used, manual unloading involves the presence of one worker for every 2 meters of length.

The rise to the roof is carried out by means of a log.

Preparatory stage

The installation of a profiled sheet on the roof begins only after the calculation of the material and the determination of its type. Managers of a company engaged in the production and sale of corrugated board can competently perform such actions. In addition, you need to prepare a set of tools for work, consisting of a tape measure, a hammer, a hacksaw for cutting metal, a drill and a cord.

Ventilation and waterproofing

One of the steps in solving the problem of how to properly mount corrugated roofing is to perform work on effective vapor barrier, thermal insulation and ventilation. This prevents the accumulation of moisture in the under-roof space, which causes the destruction of many materials.

Waterproofing materials are laid on the crate directly under the sheets of corrugated board. Waterproofing is carried out according to special rules: the material must hang down by about 2 cm, the strips must overlap up to 15 cm, the joints are sealed with adhesive tape.

Maximum air circulation is achieved by creating ventilation holes between the ridge strip and the roofing material. To create additional channels for air movement, wooden slats are placed on top of the waterproofing.

Installation of rafters and battens

On top of the waterproofing layer, rafters or steel girders are fastened (with a profile height of 4 cm). A crate is hammered onto these elements, which has a longitudinal direction. The step of the lathing is selected depending on the type of roofing material.

The crate can be made from a bar with a section of 5 * 5 cm, boards 3 * 1 cm or moisture-resistant plywood 1 cm thick.

The crate can be continuous and thinned out. The use of the first type will be more effective on the ribs, along the ridge and around the chimney. In other cases, it is allowed to pin the elements in increments of 5 cm, and the distance should be the same over the entire area.

Before mounting the profiled sheet on the roof, wooden elements must be without fail treat with antiseptics and fire retardants.

To prevent the formation of condensate, you can use a diffusion gasket, which is attached with small nails directly to the crate.

The device of the crate is a very crucial moment, on which the strength and reliability of the roof and the entire structure depend.

Formation of the cornice overhang

The cornice overhang is formed during the laying of the bottom row of corrugated board, but you must first install the cornice strip, which is located below the waterproofing. This design directs condensate and wastewater into the chute and then into drainpipe. Neglecting this rule will lead to the fact that water will fall on the walls of the house. The consequences of this are known to all.

How to mount corrugated board - technology

Proper installation of corrugated roofing is possible only if certain instructions are followed. The time-tested technology of installing a roof from a profiled sheet will allow you to build a reliable roof.

Sheet cutting

Cutting corrugated board significantly increases the consumption of material and its quality characteristics, so you should buy a coating in accordance with the dimensions of the slope. However, this ideal situation is not always obtained, therefore, it is necessary to know the rules for cutting metal sheets, as well as the tools for performing these actions.

Before you install the corrugated board on the roof, you need to measure it on a flat and even surface, for example, laying it on the ground.

They cut the material with a variety of tools, but a more efficient and high-quality result is obtained when using an electric drill equipped with a disk nozzle. From hand tools suitable scissors for cutting metal or a hacksaw with fine teeth.

It is not recommended to use a grinder or other devices with abrasive cutting discs for this purpose. The operation of such tools is accompanied by the release of a large amount of thermal energy, which can cause a decrease in the performance of the material.

The cut edge is subject to mandatory treatment with protective equipment, the most in a simple way is an ordinary paint, matched to the color of the corrugated board.

Transporting sheets to the roof

Some sheets of corrugated board are quite large, which makes it difficult to lift them to the installation site. In addition, in this situation there is a risk of damage or deformation of products.

To make the transportation of sheets to the roof more comfortable, it is necessary to use logs. These devices rest against the ground at one end, and against the eaves of the ramp with the other. The distance between the lags should not exceed the width of the sheet of roofing material. Such a device allows two builders to lift overall sheets onto the roof.

Fixing sheets on the crate

The technology of fastening corrugated board on the roof implies the following rules:

• As fasteners, it is best to use hexagonal self-tapping screws having a length of 8 cm and equipped with a sealing gasket. When tightening the self-tapping screws, one should not exert great efforts, since as a result of this the gasket may become more dense, which negatively affects the waterproofing layer.
• During normal installation, fasteners are placed in the lower wave of the profiled sheet, but at the ridge or at the junction of the sheets it is better to fix the material in the upper wave.
• The laying of the first sheet starts from the end of the slope, the second and subsequent sheets are laid with a side overlap up to half a wave. If the roof has a gentle slope, then the overlap should be 1.5 waves.
• Additional sealing is recommended at the joints. For this purpose, you can use bituminous mastic or self-adhesive tape.

Making a gable cut

Great importance in solving the problem of how to properly install corrugated roofing is given to the installation of wind slats and strips that will protect the roof and corrugated board from moisture and wind. It is these factors that can cause the destruction of the entire structure.

If the corrugated board was laid in the frontal part with an allowance of up to 5-7 cm, then a wind rail can be used for protection. This element has a size of 2.5 * 8 cm, and its fastening is carried out using self-tapping screws. Laying sheets without allowance from the side of the gable should additionally be accompanied by the installation of a wind bar. These elements overlap up to 15 cm and are fixed with self-tapping screws every 20-30 cm.

If the slope has a longitudinal or transverse interface with the wall, then use corner strips. Such parts are also installed with an overlap, which can be more than 10 cm. Fasteners are placed at a distance of 20-30 cm from each other.

Mounting the ridge and snow guards

It is recommended to arrange the ridge part of the roof from the edge on which wind loads have less effect. The profile of the ridge is selected depending on the preferences and taste of the developer, simple, figured or tiled. Self-tapping screws are used to fasten the ridge, placing them at a distance of 20-30 cm from each other. In addition, be sure to use a sealing gasket and leave a ventilation gap.

Snow retainers are necessary so that during a heavy snowfall or thaw, snow avalanches do not roll off the metal roof. At the same time, the installation of snow retainers on the roof of corrugated board must be carried out according to certain rules. These elements are installed at the bottom of the slope perpendicular to its direction. For fastening, you must first mount the bars.

Thermal insulation of the roof from the profiled sheet

In order for the question of how to properly mount the corrugated board to have a complete solution, the structure must be insulated. Mineral wool and a vapor barrier are used as insulation for corrugated roofs, these materials are considered the most effective.

Thermal insulation material can be taken in rolls or mats, high-quality and performance characteristics this does not change. Insulation fills the gaps between the rafters, using screws for fastening, adhesive composition or thick thread. The process of fixing the thermal insulation material should be controlled to avoid strong compression. After all, the main function is performed not by cotton wool, but by the air located inside the material.

The thermal insulation must be covered with a vapor barrier, it will protect the insulation from the penetration of moisture, which rises up along with warm air. Getting inside the heat-insulating material, moisture reduces its performance.

When insulating the roof, it is worth taking care of ventilation. To do this, the triangle at the top of the roof is left without insulation. It is in this place that conditions are created for free air circulation.

In some situations, you can do the following: lay the flooring from the profiled sheet on the old roof. This contributes to the increase thermal insulation characteristics roof, but provided that operational properties the old layer meet all the requirements.

Sheet roof maintenance

The corrugated board does not require special care, but care must be taken during the installation process so as not to harm the material. In addition, it is necessary to store profiled sheets until the moment of laying in upright position. It is best to make a lining of boards spaced in half a meter increments.

If damage to the protective layer could not be avoided, then the damage site can be covered with paint to match the material.

Quality and solid roof from corrugated board it is quite easy to build yourself. It is only important to know what materials to take, how to properly attach the sheets to the crate and how to protect the inner under-roof space from dampness.

And Special attention we will devote to additional elements that need to be bypassed with full observance of technology. So, do-it-yourself corrugated roofing - step by step!

Material preparation: avoiding the first mistakes

Once you have made accurate calculations your roof, you can order profiled sheets. But, if you purchased corrugated board, but for some reason its installation will have to be postponed (for example, prolonged rains), then store the sheets without removing the factory packaging, on a flat surface and indoors. Additionally, bars should be placed under the sheets in increments of 50 cm.

Shift and move such roofing material carefully, holding the edges along the length and especially avoiding creases and deflections of the sheets. You also need to move the sheets carefully, because. modern polymer coating is particularly sensitive to mechanical damage.

How to cut this material with abrasive cutting tools: Fragments from the wheel will scratch, and significant heat will occur at the cut site. But, if you had to work that way, then immediately cover all the damage with repair paint.

Fortunately, the technology of roofing from modern corrugated board will allow you to carry out all the work in the warm season, from April to September, and you will not have to store the sheets for a long time.

Installation of corrugated board: step-by-step master classes

Let's first of all immediately deal with building terms so that you do not have to search the Internet for the meaning of each new word:

You will be surprised, but the same (at first glance) material needs to be laid in different ways. It's all about the manufacturers - everyone gives their own recommendations for laying, and they are really important. Because corrugated board from different companies is demanding on its conditions, even if the differences are small. Therefore, carefully study the instructions attached to the roofing material and do not trust fully hired workers who “ate the dog on such roofs” and try to do everything their own way.

Here is a simple example of how the installation of corrugated board with a thickness of less than 0.7 cm and more durable differs:

And when working with such material, a wooden scaffold is no longer needed:

Imagine that a hired team starts stomping on thin corrugated board, because before that they “put the exact same roof on your neighbor” and “nothing bent”? And now it will bend, and how, to which the unfortunate workers will declare that "the way it was."

But, speaking in general, the main indicator of high-quality roof installation is tightness. After all, the roof just serves to protect everything from moisture and cold. internal structures. And even an inconspicuous gap can become a serious problem: dampness, smudges, quickly deteriorating materials and fungus. That is why we will now analyze in detail all the subtle points.

A little about safety

The technology of roofing with a metal profile is not as complicated as it is important not to damage the roofing during its installation. After all, although this material looks strong and tough, caution is still required when working with it:

1. On the finished metal profile flooring, move in soft shoes.
2. Try to step only on the concave waves of the sheets and better directly on the screws.
3. So, you can only step on the roof on your toes.
4. Keep your foot always parallel to the slope.
5. Only one leg should be in one recess.

Construction of a sheathing for corrugated board

The crate for mounting the roof is made either solid, if the slope is small, or sparse, in increments of up to 5 meters. But with what step the roof lathing is needed depends on how thick the sheets of corrugated board will be:

Waterproofing and wind protection

Next, we think about how to do it right roofing cake roofs. The modern market produces a lot of waterproofing materials, the most different types and properties. We even have a whole separate article about it. But in general, focus on the following program of action:

• Step 1. So, fix the selected waterproofing material on the rafters. To do this, take the most common construction stapler, but before laying it, be sure to check whether you are laying the film or membrane on the wrong side. And glue the panels together with a special tape.
• Step 2. After that, we break through the slats along the rafters (take a thickness of at least 2 cm) and thus form the ventilation gap necessary for ventilation.
• Step 3. Now we put the roofing material on this upper crate.

Here's what it all looks like in real life:

We select high-quality self-tapping screws

The consumption of self-tapping screws when fastening corrugated board is usually about 6 pieces per 1 square meter. Self-tapping screws 4.8 by 28-35 mm are suitable, as for wood, and for additional elements - 4.8 by 50 or 60 mm. As a tool, purchase a screwdriver with a special nozzle or a cordless electric drill from the same manufacturers of roofing materials.

Special self-tapping screws for fastening profiled sheets are indispensable, because. This is the only way to ensure:

• Complete waterproofing of the roof.
• High connection strength.
• The minimum risk of injury to the coating during fastening, and, therefore, the absence of corrosion in the future.

The highest quality and most reliable self-tapping screws for corrugated board are sold by the same suppliers that deal with sheets. Use zinc coated carbon steel or stainless steel screws whenever possible. perfect option. But when buying, still carefully inspect all sealing washers.

How to properly fix the corrugated board?

You can understand that you have fastened the screw correctly by the metal washer - it will protrude about 1 mm of the rubber gasket.

It is necessary to screw the screws into the roofing material strictly perpendicularly, directly into the deflection of the vertical wave at the corrugated board. Although there are a lot of disputes about this in the construction fraternity, and each method has its own advantages. So, a self-tapping screw in the lower wave creates a more reliable fastening, and in the upper wave, rainwater is much less likely to get into the under-roof space.

On the eaves and ridge, you need to screw the screws into the deflection through the wave, and in the middle of the sheet - into each board of the crate. In total, you will need about 5-8 pieces per square meter.

What tools are needed for installation?

Note that the device of the roof itself from corrugated board is really within the power of even a person with little knowledge in construction. Of course, there are roofing materials that only experienced professionals can properly install. But in the case of modern corrugated board, we can reassure you: you can handle it yourself!

Fortunately, there is nothing complicated here. Due to the large length of the sheets, the roof slopes overlap without additional transverse joints, and the material itself is easy to cut and shape. You will need a minimum of tools for this business:

So, you can lay corrugated board on slopes of almost any angle of inclination, it is only important to correctly calculate the amount of transverse overlap:

• 150-200 mm for roofs with 15-30°.
• 200 mm for slopes from 14°.
• 100-150° at large angles.

For fastening, you will need self-tapping screws with special sealing washers:

In what order should the sheets be laid?

Many roofers install profiled sheets like this: starting from the bottom row, they first lay 4-5 sheets, and each of them fix only one self-tapping screw in the center. After that, the sheets are interconnected with self-tapping screws 4.8x19 mm, which are installed in increments of 500 mm. Now they check how the sheets turned out to be aligned with the roof overhang, and finally fix the roofing material. Here is the scheme:

But, if you are working on the roof for the first time, in order to avoid distortion, fasten the profiled sheets in the same way, but in this order:

• Step 1. We install the first sheet on the crate, and fasten it with one screw at the very ridge.
• Step 2. We lay the second sheet so that the bottom edges of both sheets below form one perfectly even line.
• Step 3. We fix the overlap along the top of the wave under the very first transverse fold.
• Step 4. We evaluate by eye how correctly the sheets are docked. Uneven? Then lift one sheet from the other, tilt it slightly from the bottom up, and again join the fold by fold. Secure everything with self-tapping screws at the top of the waves.
• Step 5. Work with 3-4 sheets in this way, carefully align them with the cornice and then install the remaining sheets.

To the base of the roof, the corrugated board must be mounted so that the edge extension is 40 mm from the eaves. This is necessary in order to leave a gap on the ridge optimal size and the ventilation of the roof was not disturbed. By the way, if the profiled sheets have a gutter, then each next one should overlap the groove of the previous one.

Remember: when laying, you cannot step on the comb of the sheets - they will bend. In general, fitters wear soft shoes for such work. That's all the details!

Working with additional elements

And now let's move on to our numerous additional elements. All of them, as a rule, are made in standard lengths: for a roof with a polymer coating - 2 meters, for a galvanized roof - 2.5 meters. They complete the roofing work themselves. The sealant, which is traditionally placed between the roofing material and additional elements, allows them to fit more tightly to the sheets, further preventing moisture from entering under the roof and allowing it to “breathe”.

But for the design of skates, cornices and others complex structures you need to purchase special elements that are offered by the same manufacturer whose roofing material you purchased:

It is necessary to fasten the additional elements with the same 4.8 roofing screws as the main material. The only difference is that the metal roofing is fastened with self-tapping screws 28-35 mm long, and the elements - with self-tapping screws 50-60 mm long.

Valley and valley overlay

And now let's deal with such a mysterious name as "valley". The valley and the valley lining are additional elements duplicating each other, which are mounted at the points of internal convergence of two differently directed slopes. You need to fasten the valley under the corrugated board.

Therefore, if the roof has complex shape, with internal surface joints, then take the valley and the valley overlay as an additional element. So you will give your roof a neater and more aesthetic appearance, additionally protecting complex transitions from moisture getting inside.

Aprons for pipes

The most critical stage of the roof is the removal of pipes. Such pipes consist of two conditional parts - the lower one, which goes along the roof profile, and the upper one, the actual pipe. And, if the through passage of the pipe falls on the lower part of the roof, it makes sense to install a snow stop above the passage.

For sewer ventilation system an uninsulated pipe about 10 cm in diameter is passed through the roof, without a head. And for radon, they take the same pipe, but with a cap. Remember that these pipes cannot be connected to ordinary ventilation pipes, because. for those, insulated elements of 125 mm in diameter are already used.

The pipe itself can be installed both before the installation of the roof, and at the end. If you chose the second option, then in the finished roof you will need to cut a hole for the pipe and cover it with some material for a while. In the course of finishing work, pipe cuttings will need to be made of galvanized steel aprons or more modern materials like Wacaflex.

Here good master class, how to do it:

dormer window

Now we are working with dormer window. So, we cut the sheet of corrugated board into two parts at the lower end of the groove, put the bottom sheet, then the bottom plank of the groove, and only then the top roofing sheet.

snow holder

The snow guard is mounted in those places where there is a risk of snow rolling. For corrugated board, this is usually the second line at a distance of 30-40 cm from the eaves. For installation, use self-tapping screws 4.8x50 through 1-2 profile waves.

Outer and inner corner

If the ramp changes its direction, then additional finishing elements such as internal and outer corner and transition. Their main task is to create maximum tightness and give the joint of sheets an aesthetic appearance.

adjoining

The junction is an additional element that serves as a bypass for the chimney or protection of the roof adjoining the wall:

Cornice, end plank and joint plank

And here is the instruction:

1. Start the installation of the end strips from the side of the roof overhang, directing towards the ridge.
2. He already has an extra part of the end plate, just cut it off.
3. Fasten the plank to the end board and profiled sheets in the ox comb with screws in increments of up to 1 meter. If you did everything right, the end strip will cover at least one wave of the roof profile.
4. Fasten the end plate with wood screws 4.8x60 or 4.8x50, directly to wooden base. Leave a step from 30 to 50 cm and make sure that the end plate completely covers the end of the extreme wave of the corrugated board.

Now we move on to the installation of the connecting strip of the joint. Its length is 2 m, and the overlap of the planks cannot be less than 1 meter. The joint plank is taken 2 meters long, and two planks are attached to each other with an overlap of at least 1 meter. Attach the additional element to the wall in a strobe, or hide everything under the wall sheathing.

The main purpose of the eaves strip is to protect the under-roof space from precipitation, especially in rain with strong winds. And the lower the angle of inclination of the roof, the more necessary this additional element. But you need to fix the eaves bar earlier than the sheets of corrugated board. Overlap - 100 mm.

Installation of the skate

After all the roofing material has been laid, we fasten the ridge. In advance, we line the joints of the ridge and the roof with a sealant. Ridge elements for trapezoidal roofing sheets are usually taken smooth. Between them and profiled sheets, it is advisable to put ventilated seals, and for small corrugations - special ridge seals.

We fix the skate with screws on both sides at a distance of 2-3 waves. It is important that the ridge itself covers all the first screws that hold the sheets of roofing material. Ridge strips should overlap each other with a grip of at least 1 meter, and we fix the elements to the roofing sheets with self-drilling screws in increments of up to 3 meters.

An important point: the smaller the angle of inclination of the roof, the wider the ridge itself should be. Yes, the most standard sizes- 140x140 mm or 200x200 mm.

But today it is more fashionable and rational to order a figure skate, which comes in two dimensions: 110x30x110 mm and 145x50x145 mm. There are also special types of ridge for a complex roof, when multidirectional slopes come together.

Roof care from corrugated board

Snow on the roof of profiled sheets lingers quite a bit, and therefore it is not necessary to clean it. But, if you need to carry out certain repairs, then arm yourself with small plastic shovels that will not leave scratches.

Caring for corrugated roofing is quite simple: the rain itself will wash away all the dirt and dust, and you just have to clean the grooves and drainage systems from clogged fallen leaves once a year.

If for some reason a more serious cleaning is to be done, then use ordinary water and a hose with a pressure of up to 50 bar. Detergents you can use only those that are intended for painted surfaces, and "White spirit" will help to cope with stubborn stains.

As you can see, nothing complicated!

Thin metal sheets are bent in a wave, i.e. subjected to profiling, resulting in a corrugated board (profiled sheet metal). This form gives the sheet rigidity, increases the resistance to bending. The shape of the arch can be different - triangular, rectangular, trapezoidal or even semicircular, in the form of a regular wave. But all dimensions are calculated in order to obtain not only strength, but also an attractive appearance. The steel sheet is coated with colored polymers that protect it from oxygen and water and resist abrasive.

P the popularity of corrugated board as a roofing is high. In the pros - normal durability at a low price.

Issues of ventilation and waterproofing in corrugated roofs

The corrugated board, which is based on a metal sheet, conducts heat well. Without direct heating from the sun, it can be much colder than the moist air coming from the house into the under-roof space, therefore it condenses moisture on itself.

To prevent moisture roof structures, and the normal condition of the rafters and battens was maintained, a number of measures must be provided for in the roof covered with metal.

The underside of the corrugated board on the roof should be washed by a jet of air. To do this, the crate is arranged staggered, and under it, with the help of additional bars on the rafters, a ventilation gap of 3–5 cm in height is formed. The jet moves from bottom to top due to heating by heat from the house passing through the insulation layer.

The entire rafter system is protected by waterproofing, regardless of the presence of insulation and its type. The film is laid on the rafters under the counter-bar (rafter strips).

Rafter slats (counter-lattice) and batten boards must be treated with an antiseptic.

If the roof is insulated between the rafters with insulation mineral wool, then it is desirable to perform two ventilation gaps:
- 1 - between the profiled sheet and the waterproofing membrane;
- 2 - between the waterproofing and the vapor diffusion membrane (insulation layer).

The purpose of such complications is to prevent high humidity and increasing the temperature under the corrugated sheet so that the dew point is not reached, but ventilate it exclusively with outside cold and dry air. This prevents condensation on the reverse side of the metal sheet at any outside temperature, and therefore ensures a long service life of the product.

In this case, the waterproofing membrane must end at least 50 mm below the top of the roof to allow air to escape from the underlying gap.

How to properly install

There are various grades of profiled sheets with different strengths. Roofs can have a different angle of inclination. important in all options ensure sufficient rigidity of the coating and prevent water leakage at the joints. This is achieved by regulating the spans of the crate and changing the overlap of the sheets, both longitudinal and transverse.

What overlap of corrugated sheets should be on the roof, and what step of the lathing, depending on the angle of inclination and type of corrugated board, to apply - recommendations for installing the corrugated sheet in the table in the figure.

If the angle of inclination of the roof is up to 12 degrees, then both the vertical and horizontal overlap of the corrugated sheets must be sealed with a sealant.

What horizontal overlap should be for corrugated board covering? The horizontal overlap depends only on the angle of inclination. Information on the installation of corrugated board is shown in the figure (see table).

Eaves overhang depends on sheet stiffness (profile height) and snow load. The cornice overhang of corrugated board, depending on its brand, is shown in fig.

How the corrugated board is fixed

To fasten the corrugated board, galvanized screws 4.8 mm x 30 ... 45 mm should be used, which are placed on a neoprene washer.

A typical mistake is the use of cheap self-tapping screws and ordinary rubber. As a result, through leaks of the roof and pockets of corrosion appear.

The number of self-tapping screws for fastening to the crate - 5 - 8 pcs. / m square.

Fixing is carried out at the bottom of the profile wave.
Between themselves, sheets of corrugated board are also fastened with self-tapping screws on the upper wave.

Attachment of additional elements

The gable cut can be made using a wind board (25x80 mm) or using a wind plank, as shown in the figures. Fastening step - 200 - 300 mm.

In the region of the ridge, it is important to provide the necessary ventilation gaps for the release of the vent jet. In the figure, the vent gap is marked with the letter K.
Ridge decoration elements are laid in such a way that the overlap is in the prevailing wind direction with an overlap of up to 150 mm. They are fastened through the upper wave with long self-tapping screws with a pitch of up to 300 mm.

Additionally, you can see

home » Attic » Roof decking from corrugated board. Detailed installation of corrugated roofing and do-it-yourself installation of a roof covering according to a lightweight scheme