Cover the roof with corrugated sheeting. How to cover an old roof with corrugated sheeting. How to cover a flat or pitched roof yourself

Many novice craftsmen want to cover the roof with corrugated sheets with their own hands, but not everyone knows how to do it correctly.

IN Lately Corrugated sheets are used quite often in construction. Corrugated sheeting is a rigid material and has good aesthetic properties. This material can be used to cover the roof of a private house on a summer cottage or an industrial warehouse. The roof may have different shape. The material is quite simple to install - even a master without experience can figure out how to cover a roof with corrugated sheeting with his own hands. Corrugated sheeting is steel sheets with waves.

The main difference between corrugated sheets and other materials is the molded profile, which comes in several types. Wall corrugated sheeting can be characterized by a small profile height and the thickness of the metal sheet. It can be used in places that are not subject to heavy loads.

Diagram of a corrugated roof structure.

Another type of profiled sheet is roofing. It is durable, the profile height is from 20 mm. Stiffening ribs give additional strength to the material; it can be used to cover hangars, fences and sheds.

Another type of corrugated sheet is load-bearing. This material has high strength and rigidity. It is made of thick metal, has a profile height of 45 mm or more.

To properly cover roof with corrugated sheets, you will need to decide on the type of material. Grades N and CH are suitable for roofing; the profile height should be more than 35 m.

Tools needed to cover the roof with corrugated sheeting:

metal scissors;
drill attachment for cutting metal;
screwdriver;
special pliers;
roulette;
screwdriver attachment 8x45 mm.

Nuances to consider

Attaching profiled sheets is not difficult, but there are some features that should be taken into account. These include delivering the material and lifting it onto the roof of the house - all actions must be performed carefully so as not to damage the corrugated sheeting.

It is also worth remembering about safety: when performing any actions with metal, you will need to wear protective clothing; walking on the roof is allowed in soft shoes.

First you need to determine the installation method. Next, you need to make a flooring from boards under the valley slats and secure the end slats.

The installation of the roof should begin with laying the eaves strip. After this, you can begin to fix the profiled sheets from the end part. If corrugated sheeting is installed on a hip roof, then you need to start from the central part of the hip. For fixation, each sheet will require approximately 7-8 self-tapping screws. It is advisable to process some joints using metal rivets.

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How to fix corrugated sheeting near valleys, ridges and pipes?

The technology for installing corrugated sheets involves decorating the places near the valleys, pipes and roof ridge with metal sheets. You can do it yourself this way:

First, a valley of short length is installed. To do this, you need to cut the sheet at the bottom of the groove into several identical parts. First of all it is mounted bottom sheet, after which - the bottom rail. Finally, the roofing sheet is installed.
Next, the end rail is mounted. The length of such a plank is 2 m, the overlap should be from 5 to 100 mm. Installation should begin from the overhang side towards the ridge of the roof. The excess near the ridge will need to be cut off; the entire end strip should cover at least one wave of the sheet. Next, the rail is secured to the end strip. The element installation step is 1 m.
At the next stage, the ridge strip is installed. In this case, you can use special smooth parts for skates. Qualified craftsmen advise laying sealing elements with fine corrugation under profiled sheets. Another option is to use elements that follow the profile of the roof. The overlap should be more than 100 mm. On the sheet side, the lath is secured using self-tapping screws. The installation step of fasteners is a maximum of 400 mm. All fasteners must be located under the casing. A ridge seal should be used for protection. In the case of a lateral connection, a longitudinal sealing element will be required. This part does not need to be installed on steep slopes.
Next, the installation of pass-through parts or outlet tubes is performed. All tubes consist of two parts. At this stage, it is recommended to install a snow-thrower. The diameter of the tubes should be approximately 10 cm. The tubes for ventilation must be insulated.

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How to cover a roof with profiled sheets?

You can install your own roof at any time of the year. This requires an ordinary plumbing tool. The material sheets can be easily cut and bent to the required size and shape, with virtually no waste.

Before covering the roof, you will need to install reliable waterproofing. A special membrane must be installed on the rafter structure. When installing an insulated roof on waterproofing material A layer of insulation is laid, followed by a layer of vapor barrier. In case of execution cold roof A ventilated space should be provided.

The greater the roof slope and profile height, the larger the pitch can be. After the installation of the sheathing is completed, it will be possible to begin covering the roof. It is important to consider the following nuances:

The corrugated sheeting is laid from bottom to top from the end of the roof.
To install in even rows, installation must be done parallel to the roof overhang.
The profiled sheet is attached to the sheathing with special self-tapping screws for roofing, which are equipped with a polymer washer for sealing.

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How to cover a flat or pitched roof yourself?

If the roof slope is less than 12°, installation of corrugated sheets involves overlapping the sheets by at least 2 waves. Additionally, it is recommended to seal the joints with bitumen or silicone-based sealant.

When covering a pitched roof with corrugation, it is recommended to start installation from the bottom corner of the slope, in this case you need to protrude about 20-30 cm beyond the cornice. The sheets are fixed along the cornice at the bottom of all waves.

Each subsequent sheet must overlap the previous one.

Corrugated sheeting consumption table for roofing.

If the roof slope is approximately 12-15°, then the sheets should be overlapped by at least 20 cm. If there is a roof whose slope angle is 15-30°, then the sheets should be overlapped by 15-20 cm. A roof with a slope angle of more than 30° should be overlapped by 10-15 cm.

The sheets are fixed according to the following scheme: at the end parts of the roof, self-tapping screws are attached to the outermost sheathing strip; the installation step of the fasteners should be 50 cm. In the middle, the sheets are attached to the sheathing strips on one side. To decorate the sides and the ridge, it is necessary to produce shaped profiled sheets.

If buildings are being reconstructed, it is better to leave the old covering (for example, a soft roof), while corrugated sheeting should be used to cover the existing structures of the sheathing and rafter system. The sheets are lightweight, so they will not increase the load on the roof.

In order for a roof made from this type of flooring to serve for many years, the cuts and places where self-tapping screws are installed will need to be treated with special compounds that can prevent corrosion.

Corrugated sheeting is universal construction material, which is used for a variety of purposes. More and more often you can see elegant and very attractive roofs covered with bright sheets of corrugated sheets. Mostly there are monochromatic coverings, but there are also geometric patterns in the form of stripes and rectangles, which give the roofs of the house a special style and individuality.

How to cover a roof with corrugated sheeting and how to properly care for the corrugated sheet? Once you become familiar with the features of this process, you will be able to work with this coating yourself.

Advantages of laying corrugated sheets on the roof of a house

Before considering the features for the roof of a building, let’s determine the advantages of such a material. Before starting work, many people wonder how to cover the roof with corrugated sheets in such a way as not to attract expensive construction crews. This is precisely one of the most important advantages of this coating - we make this kind of roofing ourselves.

Two or three people will be enough, even if they do not have special knowledge. Roof installation is very simple, its rules are accessible even to beginners. at home or you can arrange it from scratch in a couple of days.

The question of how to make a corrugated roof strong and reliable disappears immediately if you study the characteristics of this material. Corrugated sheets are made from cold-rolled metal sheets, which are often coated with polymer on top.

The thickness of the material makes it resistant to wind loads, and the paint layer prevents precipitation and corrosion from damaging the coating. So the installation in this case will be reliable.

The cost of the material is affordable, as is the quantity of all additional materials for the roof of the house.

Thus, the questions of how and how reliable it is are resolved very simply.

Features of self-laying corrugated sheets

How to properly cover a roof with corrugated sheeting and close it interfloor ceilings? Installation using corrugated sheets is quite simple, but there are still some features that need to be taken into account. These include delivering the material and lifting it onto the roof of the house - care must be taken so as not to scratch or damage the profiled sheets for the future roof. It is also important to cover the sheathing correctly and carefully.

We must not forget about safety: when we ourselves begin to work with metal, it is necessary to wear protective gloves and clothing; you can only walk on the roof in soft shoes, stepping on the ridge.

When installing, it is important to correctly determine the type of rafter system and the pitch of the rafters; the performance will be affected by the overhang angle and the type of profiled sheet. We cover the roof of the house, taking into account these parameters.

Laying rules

Installation of sheets and arrangement of the roof are simple. First, we need to determine the installation option. Next, we make a boardwalk under the valley planks and attach the end strips.

We begin the installation of the roof by laying the eaves strip, which should be located below waterproofing film. After this, we start from the end; in cases with hip roofs, we start from the center of the hip. For fastening, one sheet requires from seven to eight self-tapping screws; some joints are recommended to be processed using steel rivets.

All sheets must be aligned before final strengthening along the end of the roof slope! The overlap of the material, depending on the angle of the slope, will be from one hundred fifty to two hundred millimeters, it should not be less than one wave.

Installation of corrugated sheeting near valleys, ridges, pipes

The technology for laying corrugated sheets involves placing metal sheets around the areas near valleys, pipes, and the roof ridge. Let's look at how you can do this yourself.

Gutter device dormer window, that is, the design of a short valley. To do this, we ourselves cut the sheet at the lower end of the groove into two equal parts (we take this into account when calculating the material for installation). First we put the bottom sheet, then the bottom strip, the last one comes roofing sheet.
We install the end strip ourselves. The length of such a plank is two meters, the overlap of the material should be from fifty to one hundred millimeters. Installation begins from the overhang side towards the ridge of the roof. Near the ridge, the excess must be cut off; the entire end strip will cover no less than one wave of corrugated sheeting. Now the plank is attached to the end board and profiled sheets in the ridge, the fastening step is one meter.
Installation of ridge strip. Here you can use special smooth elements for skates; experts recommend laying seals under the corrugated sheets, either repeating or with fine corrugation. The length of the overlap should be from one hundred millimeters; on the sheet side, the plank is attached using self-tapping screws in increments of up to four hundred millimeters. All fastenings that we make ourselves must go into the groove or under the casing. For protection we use a ridge seal: for a lateral connection we take a longitudinal seal; on steep slopes it can not be used.
Installation of pass-through elements or outlet pipes. All outlet pipes, which we also install ourselves, consist of an upper part (the pipe itself) and a lower part (selected according to the roof profile). It is advisable to immediately install a snow barrier. The diameter of the pipes should be about one hundred millimeters, ventilation pipes needs to be insulated.

Seals and screws for corrugated sheets

So, let's cover the roof of the house. Technology requires use special screws and seals. Self-tapping screws are made of galvanized, hardened steel. They have a special gasket made of EPDM elastomer, their caps are made of polyester, thermally strengthened powder, which guarantees the highest quality, resistance to corrosion, mechanical damage, and ultraviolet rays.

Corrugated sheet fastening diagram.

The technical characteristics of the self-tapping screws are as follows:

dimensions – 35*4.8;
surface treatment – electrolytic galvanizing from 12 microns;
self-tapping screws contain stabilizers that help prevent aging during negative impact ultraviolet rays;
outer covering of the cap powder paints thickness from 50 microns;
Gaskets can be made of polymer or aluminum sheet (for valleys).

Often involves the use of special gaskets that serve as protection against snow, rain, wind, preventing them from getting under the surface of the flooring, thanks to tight fit material for the planks. This increases the service life of the truss structure, insulation, interior decoration at home, sound and wind insulation is greatly improved.

Today, installation can be carried out using seals that match the shape of the corrugation of the flooring. In addition, there is a special seal for the ridge for 1.1 meters, reverse for 1.1 meters, universal for two meters, at an angle of forty-five degrees for 1.05 meters.

Care of roofing sheeting

Covering a roof with corrugated sheets with your own hands is not difficult, as is caring for it. For cleaning, rain is enough to make the surface clean again, but leaves, branches and other debris sometimes cannot be completely washed off with rainwater, so annual cleaning of the surface is recommended.

Likewise, you need to clean it regularly drainage systems, grooves. Areas that are stained or heavily soiled should be washed with a soft brush and plain water from a hose under a pressure of up to fifty bar.

If the dirt is sufficiently ingrained, you can use detergents for painted surfaces. We do it ourselves this way: apply the product to the surface of the roof, then give it a couple of minutes for a better effect and rinse with clean water. We clean difficult stains with a clean rag soaked in solvent. After this, the roof must be rinsed with clean water.

Attention: we do not use products for cleaning the roof that are not intended for such work, as this can cause too much damage to the surface of the polymer and the sheet itself.

We remove snow and ice ourselves using plastic or wooden shovels; this must be done carefully to prevent scratches from occurring during cleaning.

Thus, the installation of corrugated sheeting differs from many other options in its simplicity, although it also has its own characteristics. Must be strictly followed simple rules laying, correctly calculating materials and taking into account the features of the rafter system. All that remains is to cover the sheathing with a corrugated sheet, and you don’t have to think about repairing the roof.

In the article I will tell you how to properly cover a roof with corrugated sheeting, starting from the selection of material and ending with the technology of attaching it to the sheathing. The information provided will help you plan your work correctly to achieve the desired result with minimal investment of time, effort and money.

Advantages and disadvantages

Using profiled metal sheet as roofing material has a number of advantages:

Strength and durability. If properly selected and installed in compliance with all requirements, corrugated roofing can last 30 years or more without requiring repairs.
Resistance to external influences. When producing high-quality corrugated sheets, the steel base of each sheet is covered with several layers of anti-corrosion coatings. Thanks to this, the metal does not rust and retains its strength.
Light weight. The weight of corrugated sheeting is about 6 - 8 kg/m2, which allows you to lift it onto the roof without the use of special equipment. The second plus is the low load on the load-bearing structures (rafters, sheathing), which allows savings through the use of thinner beams and boards.

Fire safety. The corrugated sheet not only does not burn itself, but also prevents the spread of fire.
Price. If we exclude the cheapest slate, then covering the roof with corrugated sheeting can confidently be called the most affordable method. If you want to save money, choose corrugated sheets.

Now about the cons:

Corrosion on the cut. As I noted above, cut edges and places where we screw screws are potential sources of corrosion. State metal base These areas need to be monitored and measures taken at the first signs of rust.

Heating in the sun. In the summer, a roof made of corrugated sheets gets very hot, so the temperature in the under-roof space and in the room itself also increases. This problem is partially solved by installing thermal insulation with inside roof slopes, but only partially.
Disgusting soundproofing. For me, this is the most serious drawback, significantly limiting the use of corrugated sheeting as a roofing material for residential buildings. You can hear everything - rain, hail, wind, birds, even cats! Again, a layer of thermal insulation using porous materials partially absorbs sound, but does not completely eliminate it.

The controversial point is the appearance. On the one hand, corrugated roofing looks neat, and in some ways even ascetic. On the other hand, corrugated sheeting cannot be confused with other roofing material, so the roof will still look “cheap” to some extent. That is, there is not much difference for a garage or barn, but the design of a residential building may suffer.

What do you need for work?

Materials

Be that as it may, but very often positive properties the profiled sheet is outweighed and chosen as the main roofing material.

To install a corrugated roof with your own hands you will need:

The corrugated sheet itself has a base thickness of 0.5 to 0.7 mm. For roofing works suitable grades from C8 - C21 to C44 - H60 The lower the planned load on the roof, the smaller the profile size you can choose.
Additional elements made of profiled metal. This should include internal and external valleys, end strips, drip edges, linings for masking the joint with the walls, etc.

Lumber for creating sheathing - beams 40x40 or boards 100x30 mm.
Board materials (plywood, OSB board) 15 mm thick to create continuous sheathing.
Roofing waterproofing membranes.
Thermal insulation materials (most often mineral fiber-based boards).

Sealing tapes for filling cavities around the perimeter of the roof. It is best to purchase a tape made of porous material, the profile of which matches the profile of the roofing sheet.
Fasteners – nails and self-tapping screws for installing sheathing, self-tapping screws for corrugated sheeting.

TO additional materials I would consider a vapor barrier membrane designed for installation on the inside of an insulated slope. It is also worth purchasing an antiseptic impregnation for wood, which we will use to treat both the sheathing parts.

Tools

To properly cover the roof with corrugated sheeting with your own hands, we will need the following tools:

Wood saw for cutting beams, boards and plywood for sheathing.
Manual or electric metal shears for cutting corrugated sheets.

Under no circumstances should you cut corrugated sheets with a grinder. When in contact with a grinding or trimming disc, the metal heats up, which leads to the destruction of the anti-corrosion coating. As a result, the roof will rust very intensively at the cutting line.

Screwdriver for quickly tightening screws.
Construction stapler.
Knife for cutting waterproofing membranes.

Knife or saw for insulation.
Measuring tools – plumb line, level, tape measure.

To increase productivity and ensure safety, it is important to properly organize work at height. You need to move along the roof slopes only with a safety harness securely attached to the ridge area. It is advisable to carry tools in a special belt with pockets.

Another tip is to fence off the area adjacent to the roofing work site. This way you will reduce the risk of injury to others, because both tools and roofing parts tend to fall at the most inopportune moment.

Preparation

Calculation

In order to properly cover the roof, it is necessary to perform at least an approximate calculation of the load-bearing capacity of the sheathing. If you make it too thin, the corrugated sheeting will “play” under its own weight, which will ultimately lead to weakening of the fasteners and the appearance of leaks.

On the other hand, too dense lathing requires the use of a large amount of material. Hence the increase in weight load and the rise in cost of the structure as a whole.

To select the optimal sheathing pitch, you can use the table:

The calculation is given for sparse lathing, for which boards 100 x 30 mm or beams with a cross section of 40 x 40 or 50 x 50 mm are used.

When installing continuous sheathing, plywood with a thickness of 15 mm or more is used. It is permissible to use oriented strand board (OSB) with a similar thickness and bearing capacity.

When calculating the volume of purchases of materials for installing the sheathing, you need to keep in mind that not only the width and length of the roof slope are taken into account. It is also necessary to take into account the extension of the roof (horizontal projection beyond the gable) and overhang (lateral projection beyond the front of the mauerlat). In these areas, sheathing is also being done for the roof, so the purchase of material must be carried out taking into account the dimensions.

Thermal and waterproofing

Before covering the roof with corrugated sheets , we need to compensate for its shortcomings - poor heat and sound insulation properties. In addition, additional waterproofing should be provided: no matter how well we install the profiled sheet, there will still be leaks.

We carry out work on the formation of the “roofing pie” according to the following scheme:

We lay slabs between the rafters thermal insulation material– mineral wool with a thickness of 75 to 150 mm. From the inside, we cover the insulation with a vapor barrier membrane and fix it with a counter-lattice - cross beams or plywood sheathing.

WITH outside We install a vapor-permeable waterproofing membrane. The vapor permeability of the material is very important because it preserves natural ventilation roof and prevents condensation from accumulating in the thermal insulation layer.

When installing waterproofing, we roll out the membrane rolls horizontally, going down from the ridge to the eaves. We fix the material on each rafter with several galvanized staples.

An important parameter is the size of the overlap of the material: the smaller the slope, the wider the double layer should be at the junction of the rolls. The optimal overlap for slopes with a slope of 30 degrees or more is 150 mm, for slopes with a slope from 12 - 15 to 25 -28 degrees - at least 200 - 250 mm.
To minimize the risk of water leakage, you can use double-sided adhesive tape (almost every waterproofing manufacturer has it in its line of materials). We tape all the joints, securely fixing them and protecting them from displacement.

Lathing

To cover the roof according to all the rules, we need to install reliable sheathing.

It’s easy to do this based on the above calculation:

For sheathing we take boards and beams from suitable sizes. Optimal wood species are pine, spruce and larch. The maximum permissible humidity is 18%, if more, it is advisable to dry the wood in the shade, avoiding cracking.

Before purchasing, we check the parts for knots, rot and wormholes. The appearance of the wood is not so important, but strength comes first. So if there are defects, it is better to refuse the purchase.
It is also worth checking the geometry of the timber/board. We don’t need a perfectly smooth surface, so we shouldn’t buy expensive jointed materials. Another thing is curvature: the smoother the parts are, the better the quality of the frame, and the more less strength we will spend on its installation.

Even if the tree looks flawless on the outside, we treat it with antiseptics. It is advisable to take a non-washable composition with a high content of active ingredients. The disadvantage of such products is the coloring of the wood, but in our case this disadvantage does not play a role.

An additional advantage in processing may be a reduction in the flammability of wood. This effect is ensured, for example, by the use of the Senezh FireBio Prof composition or similar solutions.

Now - the installation of the supporting structure itself:

First, we fill the ends of the rafters with thicker boards - the so-called cornice supports. You can place a thin metal corner – a drip edge – under the cornice support. It is inserted under the waterproofing material and ensures effective hardening of condensation from the wall surface.
We lay the sheathing elements perpendicular to the rafters. For fixation, we use either nails or phosphated wood screws.

We attach the timber to the rafters at one point, and the board at at least two. By fixing the board at the top and bottom, we prevent its deformation: if you install a nail in the middle or only on one side, then a fairly wide element can “go undulating.”
During installation, we control the geometry of the sheathing. Tolerance is about 2 mm per 1 m. For control, it is convenient to use two levels: long - 2 m, and short - 50-60 cm.

When installing sheathing on a wide roof, it becomes necessary to join the beams. According to the rules, joining is performed only on the rafters: the parts are trimmed, each edge is secured with separate fasteners, after which a connecting bracket is hammered into both boards.

Finally, gutter fastenings can be installed on the bottom of the slopes. We fix these parts either to the cornice board or to the end beam, which is pressed onto the rafters themselves.

So, the future roof is insulated, waterproofing is laid and bearing structures mounted. Now all we have to do is actually cover the roof, attaching sheets of corrugated sheets and additional elements to it.

Roofing

Installation of corrugated sheets

We begin fixing the roofing material on the sheathing with our own hands with installation additional elements located under the corrugated sheet. As a rule, these are lower valleys, which must be fixed at the junction of the planes to protect them from leakage, and cornice strips.

When this operation is completed, you can begin covering the main surface of the slopes.

The instructions assume work in the following sequence:

The starting point is the lower left corner of the ramp. If you start here, you can most effectively overlap the sheets by overlapping the capillary grooves.

To begin with, we lay several sheets, align them with the gable overhang and eaves overhang, and secure each with one self-tapping screw. We install a sealing tape along the end of the corrugated sheeting, bridging the gap between the sheathing and the corrugated parts of the material.
When laying, the leftmost wave of the sheet is superimposed on the rightmost wave of the already laid one. This overlap is mandatory because it ensures no leakage..

After several parts have been laid (I usually install three sheets in the first row from the bottom, and two in the second), we begin the final alignment with fixation. For fastening we use self-tapping screws with a hexagonal head and a sealing washer.
When we independently cover the roof with corrugated sheeting, it is extremely important to control the tightening forces of the fasteners. The neoprene gasket should be pressed against the metal, but not crushed or distorted. With proper compression, the material self-vulcanizes, and the fastening site becomes almost airtight.

When working with thin (0.5 -0.6 mm) corrugated sheeting, it is also important to avoid deflection at the fastening point. The consequences of over-tightening will be the formation of dents in which water will be retained as it drains, and sooner or later will leak inside.
Another trick - pre-drilling. If a profiled sheet with a thickness of 0.6 - 0.7 mm is used for the roof, then at the fastening points it is worth drilling holes whose diameter will be approximately 0.1 - 0.2 mm larger diameter working part of the self-tapping screw. This will make installation easier and, in addition, ensure the mobility of the roof during temperature deformations.

Adjusting the sheet to length using a circular saw (not a grinder!)

The installation method described in this section is used when roofing a roof with piece corrugated sheeting of a fixed width. At the same time, it is now possible to order material whose width will be equal to the width of the roof itself - in this case, you will not have to waste time joining individual sheets.

Installation of additional parts

Installing corrugated sheets on slopes is the most labor-intensive, but not the most painstaking part of the work.

After completing this stage, we need to install additional elements:

At the junction of the rafters, we place the board on the edge on the ridge beam and fix it with metal corners. We place a ridge profile on top of the board, which we fasten with self-tapping screws.

We glue a porous sealant tape under the side strips of the ridge profile, which will ensure the tightness of this unit.

We install end strips along the gables. The vertical part of the plank is attached to the end board of the sheathing, the horizontal part covers the outermost wave of corrugated sheeting and is fixed on it. You can also place sealing tape under the end strip.

We cover the joints of the corrugated sheets with chimneys, vertical walls and other surfaces with corner parts - an abutment strip.
We must place sealing material under the plank, and fasten the part itself with elongated self-tapping screws that reach the sheathing or rafters. The contact point between the plank and the wall can be additionally sealed liquid composition or butyl tape.

Conclusion

A roof made of corrugated sheets, constructed according to this scheme, will provide effective protection home from moisture for many years. To understand the technology in more detail, it is worth studying the video in this article. In addition, questions regarding difficult stages of work can be asked in the comments.

The list of significant advantages of profiled roofing steel quite rightly includes ease of installation. One large metal sheet immediately covers a significant area. The number of fastening operations and measures to align elements has been reduced.

True, the size of the covering cannot be unconditionally considered an advantage, for example, when arranging oblique ridges of roofs with four slopes. So that they do not cause difficulties, you should know how a hipped roof is constructed from corrugated sheets and how the correct installation is carried out on its plane.

Profiled roofing steel is produced in the form of corrugated or wavy sheets with or without a polymer protective and decorative shell.

It is made of cold-rolled metal, hot-dip galvanized, which provides the material with stable resistance to atmospheric attacks.

In the lines of profiled sheets from different manufacturers, there is a conditional division into load-bearing, wall and roofing categories. However, in arranging roofs, any type that appeals to the house owner can be used, if he is not too worried about the difference in the cost of load-bearing and roofing options. Note that the roofing material has smaller corrugations, is lighter in weight and has a more attractive price.

For arranging roofs with profiled sheets, all types are produced, which significantly facilitate roofing work. Within the range of products from one manufacturer, they are absolutely similar to those used in laying metal tiles. Because in fact, both roofing representatives are the same material, differing only in the presence or absence of a transverse profiled step.

By analogy with metal tiles, a drainage gutter is installed along the right or left edge of the corrugated panels. It is designed to remove moisture accumulated in the connecting seams of the coating. During the installation process, the outermost wave with a groove must be under the adjacent sheet of material, and its direct opposite must overlap the same groove of the adjacent element on the other side.

Installation of the covering is carried out by superimposing one or two corrugations of the laid panel on an element already located on the slope. The number of overlapped longitudinal recesses depends on the angle of inclination of the slope and the load-bearing capacity of the material. When calculating the material for arranging the roof, it is necessary to take into account how many corrugations are recommended to be overlapped.

The connection of individual panels into a common large-sized roofing sheet is made into a convex projection using short self-tapping screws that do not go deep into the sheathing. But the metal roof is fixed to it with a recess in wooden parts through the concave part of the corrugation. The fastening elements are made in a tone that matches the color of the roofing, and are equipped with elastomer washers that ensure tightness at the connection point.

The profiled sheet is delivered to the site of the required length, specified by the customer when making the purchase. Angle cutting is not carried out by the supplier, but is done before installation at the construction site. In order not to overpay for excess, before purchasing material it is recommended to make a roof project or at least draw a sketch to scale.

Corrugated roof design

Installation of corrugated sheets on hip and hipped roofs is carried out with a significant difference from laying sheets on structures with two slopes. The fact is that large-sized coating elements require cutting and are installed in a special order:

For tents. First, the central axis of the starting sheet and the ramp along the sheathing is marked. Then fitting is carried out with the alignment of the axes, during which the cut lines are marked. All subsequent sheets are tried on and cut upon site.
For hip. The first sheet is installed so that its edge coincides with the extreme edge of the right or left post of the ridge girder. The starter sheet has no bevel cuts and is installed to the full height of the roof. Only the panels adjacent to the oblique hip ribs are cut.

When arranging tent structures, the material for all four slopes is cut according to the same pattern. For hip roofs, the roof is cut into two end slopes and laid in the manner used in the construction hipped roofs, and two long ones with partial cutting.

When drawing up a project or sketch of a roof, for calculations before purchasing material and for development own plan When carrying out roofing work, it is necessary to take into account that:

The number of sheets is calculated based on the width of the base of each slope.
The height of the sheet is determined according to a pre-designed diagram. It should be positioned so that it completely covers the hip rib as much as possible.
The calculations use not the total, but usable width corrugated sheeting when laid with an overlap in one corrugation. If two corrugations overlap, the calculated usable width will decrease by another wave.
Sheets on triangular slopes are laid out from the center, on pentagonal slopes - from extreme point ridge run.
The optimal arrangement of corrugated sheet panels minimizes the number of roofing parts whose width is less than half a sheet. These are too weakened areas of the roof due to the large number of attachment points per unit area and seams.

IN mandatory the heights of the profiled panels should be increased by the width of the overhang above the eaves. This is the bottom edge of the sheet, 3.5 - 5.0 cm wide, extending beyond the frontal board.

During the design period, it is necessary to decide whether holders will be installed before or after laying the coating. In the first case, so-called long brackets are used, the installation of which must be carried out before installation work. In the second case, short hooks are used that are fixed on the front board; they can be attached at any time.

During independent design you should decide whether the structure needs an insulation system. Thermal insulation device significantly affects the material consumption and design of the rafter system, because the roofing pie:

A cold roof consists of only one layer. This is waterproofing made from a classic film or anti-condensation material with pile that absorbs excess moisture under the roof and dissolves it during the ventilation period.
An insulated roof includes three layers: steam, heat and waterproofing. On the side of the operated premises there is vapor barrier film, protecting the insulation following it from household fumes. WITH outside the insulation is protected by a waterproofing carpet.

The roofing pie under the corrugated sheet is arranged with one or two functional ventilation circuits. Their number depends on the waterproofing material chosen for the arrangement. It is important to remember that options containing bitumen cannot be used as waterproofing under a metal roof with a polymer coating.

The first ventilation circuit is laid between the insulation and the waterproofing carpet, if classic polyethylene or fleecy anti-condensation material is used as it. If applicable diffusion membrane, in formation ventilation duct there is no need to over it, because it spontaneously releases excess moisture to the outside when tension occurs.

A second ventilation circuit must be constructed between the waterproofing and the metal roof. Regardless of the material chosen for its construction, direct contact of the corrugated sheet with the water-repellent carpet must be excluded in order to avoid the appearance of first condensation and then rust that corrodes the metal.

The minimum size of the ventilation gap is proportional to the area of the slopes. For example, if the area being developed is 50 m², then the total area of the ventilation ducts for this slope should be 0.5 m². The last value should be divided by two in order to distribute the ventilation gap into inflow and outflow zones. For gable roofs these values are equal; for hipped structures, some difference is eliminated by installing an additional aerator.

Preparation of the rafter system

Note that profiled roofing steel is laid on both wooden and metal truss structures. The construction of a metal frame is typical for non-residential buildings, most often for household purposes. The frame can be welded or collapsible with bolted connections. The rafters are a channel or angle, the laths are a square pipe or a U-shaped profile.

Roof over residential buildings It is not customary to build on metal rafter systems. Wood is more suitable, and independent craftsmen it's much easier to work with. Therefore, we will disassemble the installation of corrugated sheets on wooden base, as the most common option.

The rafter system and sheathing can be reasonably recognized as a reliable basis for the installation of profiled sheets if:

The installation pitch of the rafters is no more than the limit of 1200 mm. The optimal interval is from 600 to 900 mm.
The rafter legs are made of timber with a cross section of 50×100 or 50×150 mm, depending on the typical wind and snow load.
The cross-section of the sheathing is selected depending on the distance between the rafters and the steepness of the roof.

The laths under the corrugated sheet are installed at equal intervals. Reduce the distance between them only in areas that require reinforcement: along the perimeter eaves overhangs to a width of 50 - 60 cm for subsequent installation of snow guards, in valleys, along the ridge run hip roof, around roof penetrations.

If the rafter system does not have sufficient parameters to ensure the reliability of the base for laying corrugated sheets on a hipped roof, it is strengthened by increasing the cross-section of the sheathing or reducing the pitch between the laths.

Algorithm for constructing a roofing pie

The construction of the roofing pie is carried out in the traditional manner observed when installing any insulated roofs. It should be remembered that before installing a waterproofing carpet around the perimeter hipped design a dripper must be installed - a thin-sheet steel strip bent at an angle, designed to drain condensate.

Sequencing:

Vapor barrier protection device. The rolled material is stapled to the rafters and secured to each other with tape. It is rolled out in horizontal strips and laid with an overlap of 10 -15 cm. If it is planned to install OSB, plywood or gypsum fiber board sheathing, a sheathing is built on top of the vapor barrier along the rafters.
Laying insulation. Thermal insulation made of basalt or glass wool is placed in the cells formed by the rafters. The material is cut so that the width of the heat-insulating element is approximately 1 cm wider than the distance between the rafters for laying it sideways.
Installation of waterproofing carpet. Water-repellent material is laid on the outside of the rafters in horizontal strips, glued together with tape. Laying begins at the eaves and continues to the top or ridge purlin. It is temporarily attached to the rafters with a stapler, then fixed with laths.

The hip and insulating films are laid with an overlap of 15–20 cm over the oblique ridge. Along the ridge line of the hip roof, the insulating layers must have a gap. There is no gap along the oblique ribs.

If the thickness of the insulating layer is equal to the width rafter leg, it is recommended to use superdiffusion as waterproofing polymer membrane. It does not require the formation of a ventilation gap between itself and the insulation, because can rid the material of condensation.

When using classic or anti-condensation fleecy waterproofing, there must be a gap between it and the thermal insulation. The width of the channel is 3 - 5 cm. It is formed by means of a sheathing made of a bar with an equal size on one or both sides, attached to the rafter legs from the outside. Then waterproofing is laid on top of it and the sheathing is re-installed to create a second-level gap - between the covering and the waterproofing carpet.

You can avoid wasting time and effort on installing a ventilation duct if the thickness of the thermal insulation is at least 3 cm less than the width of the rafter.

The construction of a roofing pie structure without insulation is much simpler and much faster. All actions consist of laying waterproofing on the rafters and installing a spacer sheathing bar on top of it. After that, all that remains is to install the eaves strips, then cover the planes of the hipped roof with corrugated sheets, secure them correctly, and fix the ridge elements.

Marking and cutting metal coating

To mark cutting panels at an angle, it is recommended to stock up on simple homemade device, which was called “devil” by folk craftsmen. To produce it, you will need four pieces of 25×100 mm board or a suitable size bar. Two blanks will be approximately 1.1 - 1.2 m long. The second pair can be of the same length or slightly longer.

The process of manufacturing a basic marking device:

On a work table or free flat area we lay out the prepared scraps of board in the shape of a rectangle or square. Naturally, they will be arranged in two parallel pairs.
Between the left or right edges of the horizontal elements of the device being constructed, we form a distance equal to the working width of the roofing panel. Most often it is 1.1 m.
We check the pairwise parallelism of the parts of the future device. After checking, we fasten them with hinge joints so that they can move relative to each other in parallel pairs.

To mark using a “dash”, we apply the marking panel to the sheet installed and secured to the roof. Homemade instrument We place it on the oblique edge of the hip so that it marks the line of the upcoming cut. We mark the panel, move it to a place convenient for cutting and cut it.

Profiled sheets can be cut with a sharp circular saw, the technical capabilities of which include the function of cutting thin sheet steel. For small amounts of work, a jigsaw or roofing shears are suitable for removing excess material. Use a grinder when cutting metal roofing unacceptable.

When cutting a coating with a polymer shell, it is necessary to ensure that it is not damaged by small chips. If scratches or cuts are found in the coating, they must be covered with repair paint.

Small sharp particles of the material being cut must be carefully removed from the panel with a soft brush before installation. Stubborn stains should be cleaned using a soap solution. It is recommended to treat the cut edges of the sheets, at least from the side adjacent to the hip and ridge ribs, with varnish or a repair compound.

Laying corrugated sheets on a hip slope

Attaching the profiled sheet metal to a triangular plane is accompanied by fitting and cutting of each sheet. Before installing them, the roof perimeter is equipped with a cornice strip mounted to the sheathing.

Work on marking panels is carried out in a strictly defined sequence:

On the first sheet we mark its central axis, on the mauerlat of the slope - its middle.
We install the first sheet, aligning the marked centers of it and the Mauerlat, and check the horizontality of the lower edge of the panel.
We secure the first sheet with one self-tapping screw at the top.
We install adjacent panels, one of which is placed on the edge of the sheet with a capillary groove, the second is slipped under it from the opposite side.
Align the block of three panels relative to the horizon and with each other.
We temporarily fix each of the newly installed sheets with one self-tapping screw at the top, trying to position the fasteners outside the part required for installation.
Mark the cutting lines.

Having completed the marking, remove the temporary fasteners and cut off excess material from the panels. Then we return them to their place, install them according to the scheme described above, fasten them again only at the top of the central sheet and align the block before final fixation.

First of all, the sheets are fastened into a single roofing sheet along the corrugation applied to the lower element with 4.8 × 19 mm self-tapping screws, screwed in every 50 cm. After joining, the block is again aligned with the horizon and the edge of the eaves and is attached to the laths. For this purpose, 4.8x38 mm self-tapping screws are used, which are installed in the recess of the profile in every second recess.

Fastening to the eaves grating is carried out in each profile recess; in the middle of the sheet, the fasteners are distributed evenly so that there are 5 fastening points per 1 m² of covering.

At the end of the installation work sheet covering The ridge elements are installed with preliminary laying of the seal along the edges of the extensions. In the arrangement of trapezoidal slopes, the first to be installed are the planks on the hip ribs from bottom to top, then the plank with plugs is mounted on the ridge ridge.

Video about the principles of laying corrugated sheets

Sequence of work on laying corrugated sheeting on the roof:

Video about the first experience in self-installation corrugated sheets:

Folk tricks in installing corrugated sheet roofs:

To ensure that the result of difficult work does not disappoint and does not require significant investments in remodeling, you need to know how to properly cover an architecturally complex object - a hipped roof - with corrugated sheeting. The material we present will provide effective assistance to independent roofers. Compliance with the described rules guarantees success.

To protect the house from rain and snow, you need to close it reliable roof. Roofing is designed to protect interior spaces from adverse atmospheric influences. Most often, a gable or four-slope (hip) roof is used for private houses, but for small buildings it is possible to install a single-pitch roof.

Multifunctional profiled sheet can be used as a coating material. A do-it-yourself roof made of corrugated sheets will allow you to complete construction without extra costs or damage to quality.

Pros and cons of roofing material

Installing corrugated sheeting on the roof is a fairly popular way to complete the building frame. But before choosing this particular material, you need to familiarize yourself with its advantages and disadvantages. Knowing the undesirable features, you can eliminate or smooth them out in time.

The advantages of the material include the following characteristics:

single slope or gable roof made from corrugated sheets with your own hands has a fairly low cost;
installation technology and transportation do not cause difficulties;
technology allows for high speed of roofing work;
light weight of the material;
strength and resistance to snow loads;
high degree of waterproofing with proper installation;
long service life;
resistance to corrosion and fading under the influence of ultraviolet radiation;
Fire safety;
when properly secured, high resistance to wind loads;
the ability to use sparse lathing, which saves materials;
availability of many color options.

The list of positive characteristics is quite wide, but do-it-yourself corrugated roofing also has disadvantages:

laying metal sheets makes the roof too noisy when it rains;
heating of the surface in the sun;
it is important to lay the material carefully; the seal may be damaged due to installation errors;
the appearance of corrosion in areas with a damaged top layer.

If the work is done correctly, the problems listed above will not arise. To reduce the noise level, soundproofing materials are placed in the coating cake. Heating from the sun for this type of roofing is no higher than for other materials. Unlike, for example, bitumen shingles, it does not lead to a change in the structure of the coating and its melting. If the installation technology is followed, problems with leaks also do not arise, and to prevent corrosion, it is necessary to be careful when transporting and moving, to prevent damage to the profiled sheet.

Which corrugated sheet to choose for the roof

There are enough available for sale a large number of various types of corrugated sheets. When purchasing material for a single or double slope pitched roof it is necessary to pay attention not only to color, but also to specifications, namely:

metal thickness;
profile type and height;
type of protective coating.

According to regulatory documents, three types of profiled sheets are distinguished:

grade "N" with high load-bearing capacity for horizontal structures;
grade “C” for vertical structures;
brand "NS" - universal.

It is best to lay the material of the “N” and “NS” grades on the roof. Grade “C” can be laid in the roofing pie only on small buildings with a large roof slope (60 degrees or more).

It is also possible to lay corrugated wall sheets in a pie for pitched roof garages. Also, when choosing, you need to pay attention to the wave height of the sheet; it is indicated immediately after the letter in the marking. For pitched roofs, it is possible to install grades H60 and H75. For flat sheets, profiled sheet H75 or H114 is suitable. To choose the right one, you need to know the snow load and the pitch of the rafters.

Roof design options

Depending on the purpose of the under-roof space, the pie of a pitched or gable roof may differ. When arranging a cold attic or technical floor, the pitched roof structure will look like this:

rafter legs;
waterproofing;
sheathing;
roofing covering.

In this case, insulation is not required, since it is provided for by the attic floor pie.
To install an attic or warm attic, you will need to install insulation. A roofing pie made from corrugated sheets will look like this:

headliner;
bottom sheathing;
vapor barrier;
rafter legs with insulation between them;
waterproofing;
wind protection;
counter-lattice;
top sheathing;
roofing covering.

The cake also largely depends on the chosen insulation. For example, styling mineral wool requires the arrangement of a layer ventilated by air. The thickness of such a gap should be at least 4-5 cm. This must be taken into account when choosing the thickness of the rafters and counter battens. An insulated roof must meet the requirements of heating engineering, based on which the thickness of the insulating material is selected.

Step-by-step installation technology

Roof installation from corrugated sheets

Installing a corrugated roof requires preparatory work. They include measuring the exact length of the slope and calculating the required number of sheets. The roof of individual buildings can be single-pitched, gable or hipped. Most often, the length of the profiled sheet is taken equal to the length of the slope. In the calculations, it is necessary to take into account the overlap margin, which depends on the angle of inclination of the surface:

200 mm or more for roofs with a slope of less than 15 degrees;
150-200 mm for roofs with a slope of 15-30 degrees;
100-150 mm for roofs with a slope of 45 degrees or more.

Having calculated the amount of corrugated sheets needed to cover the roof, you need to check the tools that may be needed. The installation of a corrugated roof requires:

ruler and pencil;
building level;
hammer and nails;
tools for cutting metal (tin scissors, hacksaw, Circular Saw, jigsaw for metal);
riveting machine with steel rivets.

Having prepared all these tools in advance, you can lay the profiled sheet without any problems.

Choice of lathing

The installation instructions for this element of the rafter system are quite simple. Lathing for a pitched or gable roof can be of two types:

solid;
sparse.

In most cases, both options are installed on the same roof. For the main area, the sheathing is laid sparsely, and such roofing units made of corrugated sheets as valleys, cornices, and ridges require installation without gaps.

The sheathing of a single-pitch or gable roof can be made from the following materials:

timber with a section of 50 by 50 mm;
board with a section of 32 by 100 mm.

The dimensions also depend on the snow load and the pitch of the rafters. In the first case, the lathing is laid every 5 cm, and in the second, every 10 cm (that is, every other). Possibility of styling more loosely.

All wooden elements Roofs must be treated with antiseptic compounds before work begins. After fixing the bars or boards (if there is no need for waterproofing), you can lay the roofing material.

Instructions for fastening sheets

Installation of a roof made of corrugated sheets requires attention to the reliability of fastening. The sheets are fixed with self-tapping screws bottom part waves. To properly cover the roof, you will need to prepare self-tapping screws with hexagonal heads and neoprene gaskets. It is necessary to use special high-strength fasteners designed for metal.

This video provides instructions for laying corrugated sheets:

The fastening technology is quite simple: the sheets are fastened with self-tapping screws to the sheathing at the bottom of the wave so that for each square meter coating required 5-7 fasteners.

Also, before you begin, do not forget to familiarize yourself with the important subtleties that professionals talk about:

Before covering the roof of a house with corrugated sheets with your own hands, you need to carefully study the issue. If the structure is installed correctly, there will be no problems with its operation in the future. The roof will not leak and will last for many years.