How to properly place a ridge on a roof. How to attach a galvanized ridge to a slate roof. Choosing corrugated roofing

Over the years of using metal roofs, it has proven itself to be durable, reliable and affordable. roofing material. It is more often used for gable roofs, since the sheets are thin and light metal with embossed relief are perfect for DIY installation. The only weak point of such a roof is the corner between the slopes, which is unprotected from moisture and is blown through. To quickly and aesthetically eliminate this defect, you need to install a stacked metal ridge.

Reasons for installation

I call the junction between two roof slopes a ridge joint. No matter how ideally the installation of the roofing material is carried out, small cracks and gaps remain between the sheets. Not only does it look unaesthetic, but an unsealed ridge causes the following problems in the operation of a metal roof:

Penetration of moisture into the cracks between sheets of metal tiles. Water seeps into any, even minor, gaps, penetrating under the roofing material and destroying wooden elements rafter system.
Blowing cold air under the roof. An unsealed ridge is an abyss into which heated air from a heated house goes; this is a gap not only in the roof, but also in the budget, because in order to maintain optimal temperature more fuel and energy resources will be required.
Ventilation problems. Installation of a type-setting ridge on a metal tile will help to establish effective ventilation attic or attic space. The air there will be fresh, without drafts.
Noise. The air, entering under the sheets of metal tiles through the ridge, circulates and is divided into streams, due to which the roofing material is deformed and makes popping sounds.

Mounting the ridge does appearance metal roofing harmonious and complete, will preserve the healthy condition of the wood of the rafter system, increasing its service life.

Assortment of inlaid skates

If previously you had to think about how to equip external corner between the roof slopes, now it’s enough to go to a hardware store and pick up a ready-made ridge in the color of the metal tile of the shape you like. Manufacturers offer the following options:

Semicircular models. Metal that is pressed into a semicircular shape. It is necessary to attach plugs to the end sides of a type-formed ridge of this shape to close the voids into which snow, water or wind can get. The most expensive of the entire range of skates.
Straight models. Made in the shape of a rectangle, it is used for hips, gables, and to decorate the ridge. Fastening a rectangular profile will cost less than a semicircular one, but such a connection will look simple.
Triangular models. They completely repeat the geometry of the angle between the slopes, so their installation does not involve the use of plugs. Most cheap way finish roofing work on a metal roof.
Decorative models. They differ from other types of skate in their purpose. Fastening decorative elements with narrow shelves does not solve problems with waterproofing the gap between the joints, but simply gives a neat look.

When choosing a metal ridge connection, you need to pay attention to the width of the shelves and the presence of edging. Models without a wrap are not rigid enough to remain level when secured with self-tapping screws. And narrow shelves, the width of which is less than 150-200 mm, are not able to effectively protect against the penetration of water and snow.

Selecting a seal

Professional roofers advise inspecting the condition of the ridge groove before starting work. If the installation of metal tiles was carried out correctly, then there should be no gaps thicker than 20 mm. Otherwise, a sealant must be used. The following types are suitable for this:

Even if the joint between the slopes seems smooth, insulating it with a sealant before you start attaching the ridge will never be superfluous, because the life of the roof and its safety depend on the tightness of the connections. interior decoration attics.

Installation sequence

In order for the skate to perform the functions assigned to it, you must follow the recommended installation technology. It’s difficult to do high-altitude work alone, so it’s better to have a couple of assistants. Installation must be performed in the correct order:

When working with metal tiles, you need to screw in self-tapping screws at the crest of its wave, use a rubber seal to isolate the holes from moisture or special self-tapping screws, the rubber head of which does the same protective functions. When performing installation, do not screw the screws too often or rarely, find a middle ground so that the metal tiles do not “whirl” from an excess of fasteners and do not “slam” in windy weather if there is a shortage.

Installing metal additional elements on the ridge will protect the roof from moisture and save heat, however, during installation, do not forget about safety precautions when working at height.

Video instruction

A ridge is an essential attribute of any pitched roof. This is the name for the junction of any two horizontal or inclined edges of planes pitched roof. Proper execution this element has a very great importance for the reliability of the entire roof.

The tightness of the roof slopes is ensured by the tight fit of the corrugated sheets to each other. To do this, when laying corrugated sheets at vertical and horizontal joints, an overlap is made. Often, for greater tightness, special capillary grooves are made along the vertical edges of the sheet. In this case, horizontal joints of profiled sheets with small roof slopes are sealed with a special roofing sealant.

If it is quite simple to prevent moisture from entering the under-roof space on the plane of the slopes, then only a special ridge element for corrugated sheeting can protect the roof from rain splashes at the junction of two inclined surfaces. This article is devoted to what it is and how to install it.

Ridge for corrugated roofing - functions and use

Most corrugated sheeting manufacturers produce, in addition to the corrugated sheet itself, all the elements necessary for installation roofing system. The ridge for corrugated sheets is made of the same galvanized steel or steel with polymer coating, like the profiled sheet itself. It is an organic part of the roof and, as a rule, is invisible, although in reality it plays one of the main roles in ensuring the reliability of the roof.

As with any pitched roof, the ridge on a corrugated roof is of particular importance. Its first and main function is to protect the under-roof space from moisture entering it from the outside. Considering the very design of the pitched roof, it is almost impossible to implement this task in any other way.

Without a ridge, the service life of the roof will be greatly reduced, as will its thermal insulation properties. Moisture will lead to corrosion of the metal and, if in sufficient quantity, to damage to the sheathing and rafter system. Therefore, you cannot delay the process of laying the roof and, especially, leave it in an unfinished state for a long time. From attaching the eaves strip and starting to install the sheets to the moment when you complete the roofing work by installing the ridge of the roof from the corrugated sheet, no more than a few days should pass.

In addition to protection from moisture, the ridge strip for corrugated sheeting performs an equally important function - it creates the conditions necessary for roof ventilation. This is especially important for insulated roofs.

Since metal profiled sheets tend to heat up very quickly when exposed to sun rays and cool down just as quickly cold weather, there is always a ventilation gap between the waterproofing and the corrugated sheet roofing. It is the air circulating in it that prevents the formation of condensation on inner surface roofing, preserving it from corrosion and subsequent penetration of moisture into the insulation.

In order to ensure ventilation, the ridge is installed on the corrugated sheeting in such a way that air can freely escape both from the under-roof ventilation gap and from the ventilation gap between the insulation and the waterproofing film. At the same time, for the free passage of air, the waterproofing membrane does not reach the roof ridge by 40-60 mm.

Scheme of a ventilated ridge for corrugated sheets

This ensures through movement of air from bottom to top: starting from the edge of the slopes and ending with the ventilation hole under the ridge element. It is worth noting that the attachment points waterproofing membrane near the ridge it is necessary to additionally insulate special tape, and this applies to both the edge directly adjacent to the ridge element and the junction between adjacent membranes - both on the sides and below.

Why do you need a ridge seal for corrugated sheets?

The ridge of the corrugated sheet is fastened with self-tapping screws through the upper corrugation of the corrugated sheet. During installation, a gap is formed between the surface of the ridge element and the corrugated sheeting, equal to the height of the roofing profile. Even with a ridge element size of 200×200 mm and a trapezoidal corrugated sheet height of more than 20 mm, splashes of water can penetrate into the under-roof space during slanting rain and strong winds. To avoid this, a special seal for the ridge of the corrugated sheet is placed in this place.

Application of a ridge seal for corrugated sheets

It must be taken into account that when filling the corrugated sheet with a sealant, it is imperative to leave a gap for air circulation. If there is no gap or it is insufficient, then the ventilation of the under-roof space will be very limited, which will affect the service life of the roof.

The ridge seal for corrugated sheets is selected for a specific brand of corrugated sheets and, as it were, reflects the shape of its corrugations. If the required seal is not commercially available, you can use the universal option. Such a seal under the ridge of a profiled sheet has a simple rectangular shape and provides both moisture protection and ventilation. However, ensuring a good fit of such a seal is more difficult.

How to attach a skate to corrugated sheeting?

Before attaching the ridge to the profiled sheet, you need to make sure that the upper edge of the slopes is approximately on the same line. To do this, you can use a laser rangefinder or a simple cord. Discrepancy is allowed, but at a level of no more than 2% of the width of the skate shoulder. That is, if you intend to use a ridge for corrugated sheeting, the dimensions of which are 200 mm in width and 2 m in length, then the discrepancy along the upper edge of the slope cannot be more than 200·0.02 = 40 mm. If the unevenness is greater, then this is fraught with roof leaks in such a place.

The ridge for a roof made of corrugated sheets is attached in increments of 200-300 mm, and the laying of the ridge elements is carried out with an overlap of 150-200 mm and begins on the side opposite to the prevailing winds in the region. As a rule, the dimensions of the ridge for corrugated sheets range from 2 to 3 meters. With a longer length, the ridge needs additional stiffening ribs or greater width to maintain its shape.

Fastening the ridge to the corrugated sheet

Typically, the width of the “shoulders” of the ridge is in the range from 100 to 300 mm, which allows you to reliably cover the vulnerable spot from rain. Fastening is carried out at the ends of the arms, at a distance of several centimeters from the edge, and in some cases, one screw can be used to fasten both the ridge and the seal.

The roof ridge assembly made of corrugated sheets usually has one of three forms:

Simple L-shape;
Skate with a top in the shape of the letter “P”;
Skate with a round top.

The latter option provides the best ventilation, but the price of a ridge for corrugated sheeting of this shape is higher. Most cheap option- just an L-shaped ridge, but it is no less reliable with a properly designed and installed roof.

Profiled sheets are increasingly being used for roofing. An important component gable construction is a hobby for corrugated sheeting. This is exactly what will be discussed in the article. What is it used for and what role does the seal play? How to carry out installation work?

The ridge is the structural part of the roof - the rib, the intersection of the slopes at the highest point of the roof and a part made of corrugated sheets, another name for which is the ridge strip. This strip has the shape of an angle that bridges the gap between two roof slopes. Often the ridge element is made of the same material as the roofing. This allows it to blend in with the main color of the roof.

The skate has several functions:

Protection of the under-roof space. Since two sheets of corrugated sheeting form a gap at the junction, it must be closed to prevent rain and snow from getting under the covering. Otherwise wooden rafter system will be subject to rotting and deformation, and metal elements- corrosion. Without a ridge element, the service life of the roof and its heat-shielding properties will decrease significantly.
Under roof ventilation. Thanks to the small space between the ridge and the roof covering, air can circulate freely and the roof is constantly ventilated. Despite the use vapor barrier material V roofing pie, warm air vapors from the room can still rise and reach the insulation. Such problems can especially arise in the kitchen and bathroom areas. Since condensation has a bad effect on the mineral wool used to insulate the roof, ventilation is very important. In order for the warm air vapors not to condense and then to rise and exit through the fin, a ridge is needed.
Decorative function. Together with the ridge for the corrugated sheeting, the roof looks complete.

As you can see, a roof ridge made of corrugated sheets allows vapors from the room to escape into the atmosphere, and also protects the roof from precipitation and other things.

Types of skate

Although the ridge bar is small and simple element roofs, they have several varieties depending on the shape.

Varieties of skate

Types of skate:

Triangular. This simple design, it is called corner. It looks like an ordinary corner.
U-shaped. The ridge at the top has folds that resemble the letter "P". It looks more interesting, but costs more.
Semicircular. Used for wave corrugated sheets. They look like a gutter with side shelves designed for mounting a ridge.
Other decorative forms.

The length of the ridge element is 2-3 meters. Counting required amount roof ridges, it is important to take into account that they are installed with an overlap. The width of the ridge shelf ranges from 10 to 30 cm, but 15 or 20 cm elements are more often used. The choice of shelf width depends on the length of the roof slope.

Using a sheet bender, you can make your own roof ridge from corrugated sheets, but buying ready-made elements is easier and not much more expensive.

Purpose of the seal

The use of a porous seal plays an important role in the installation of the ridge element. It is not visible like other roof elements, but has the following functions:

Serves for sealing roofing elements at their junctions. Since the surface of the roof is ribbed, a gap equal to the height of the metal is formed between it and the ridge; the sealant seals such gaps.
The seal between the ridge and the corrugated sheet prevents birds and insects from entering the under-roof space.
Protects against the penetration of precipitation in the form of rain or snow when accompanied by a strong side wind.

Air passes through the seal freely, which means it does not interfere with under-roof ventilation.

Types of sealant

Exist different types seal:

Universal. Presented in the form of a tape made of open-cell polyurethane foam. One of the sides of the tape is self-adhesive, so during installation the film is simply removed.
Profile. The seal is made in the form of a figured tape with closed pores. It is selected specifically for the bend of the profiled sheet. This helps to completely fill the gaps between materials. In order not to completely block the ventilation of the under-roof space, the seal has holes.
Self-expanding. Presented in the form of a strip of polyurethane foam impregnated with acrylic. On one side there is an adhesive side covered with film. After installation, the seal can expand 5 times, filling all the gaps between ridge strip and a professional sheet.

Profile seal

Tools and materials for installation

In order for the installation process to go as quickly and smoothly as possible, it is necessary to prepare all materials and tools. Some work can be done below on the ground, but when you go up to the roof, you need to be sure that all the elements are at hand and you won’t need to go down for some small detail.

Materials for mounting the ridge:

Horse. It is necessary to cut off the required number and length of these elements at the bottom, remembering the joining when fastening.
Seal. It is also important to calculate its quantity before climbing onto the roof.
Roofing screws.

Regarding roofing screws, it is worth mentioning that they come with wood and metal carvings. The former are pointed at the ends, while the latter have a drill. To drill the corrugated sheet and the ridge, you need to use metal screws; however, they will not push through the wood, but will drill a hole of the appropriate diameter in it. Self-tapping screws for wood will not be able to drill through metal. That is why, to drill through metal (only corrugated sheets, not sheathing), metal self-tapping screws are used. Then they are unscrewed and roofing wood screws are screwed in their place.

Roofing screws

You have all the materials, but you need to stock up on a number of tools. Some of them will only be needed below, and some will need to be taken with you when installing the ridge.

Required tools:

A ladder with protrusions on the edges that allow it to be fixed to the roof.
Roulette.
Pencil.
Metal scissors.
Screwdriver.

Having prepared everything necessary materials and tools, you can safely begin installing the ridge.

To understand how the installation process occurs, we recommend watching this video:

Installation process

After completing the work of covering the roof with corrugated sheets, you can begin installing the ridge. It is worth mentioning that the edges of the metal sheets should not touch each other, but should maintain a distance of 5-10 cm from the top point of the roof structure.

Scheme of fastening the ridge to the corrugated sheet

So that the ridge can be properly attached, additional sheathing bars are installed in advance on the upper edges of the slopes, and it is in them that the roofing screws will be driven. But these nuances must be taken into account before installing the ridge. Start off installation work you need the wrong side from which they usually blow strong winds, and from the opposite side and move, so to speak, towards the wind

Ridge installation process:

Installation of seal. It can be glued both to the back side of the ridge and to the roof itself. In any case, the seal should be located at a distance of 3 cm from outer edge planks.
Skate installation. The elements overlap each other by 15-20 cm.
After leveling the ridge, it is finally secured roofing screws. They are driven through the metal into the sheathing. Self-tapping screws should be fastened at intervals of 30-40 cm from each other and at a distance of several centimeters from the edges of the plank. For ease of installation, you can first secure the ridge at both edges and then screw in all the remaining screws. To do this you should use a screwdriver.

As you can see, the process of installing a ridge is not at all complicated and even unskilled people can do it. However, when working at height, it is very important to remember safety precautions. The working ladder must be securely fastened. The person performing the work must wear a safety belt. You should first think about how and what to secure it to. This will contribute to the safety and high-quality performance of all work on installing the ridge element on the roof.

The topic of the article is a roof ridge made of corrugated sheets. In it we will consider how this element of an iron roof is formed, how it is covered, what materials are used for this, installation rules and other no less important aspects. I would like to immediately point out that not all roofing structures have a ridge. This means that you don’t always have to deal with it and solve the problem posed by the article.

What is a roof ridge

This element turns out to be at the junction of two slopes. In this case, the joint should form a line, which is called a ridge. For example, at hip roof this element is missing, although the slopes are joined at one point. But not all joints are called this way, only the top and outer ones. Eg, internal corner formed by two slopes is called a valley.

As for corrugated sheets laid according to pitched roof, then according to the technology for laying it, the sheets should not be joined at the ridge end-to-end. Be sure to leave a free gap through which air from under the roofing material can escape to the outside. But to prevent precipitation from getting into this gap, it is closed with a special additional element, which is called a ridge strip. Although purely structurally, the ridge is part of the roof, and not a separate part of the roofing. But in everyday life, even masters call this bar a skate. Therefore, we will talk specifically about it: what it is made of, what shape it is, and what size it is.

Types of ridge for corrugated sheets

Let's start with the fact that the roof ridge made of corrugated sheets is made of the same material as the profiled sheets themselves. That is, from galvanized steel sheet, painted or coated polymer layer. In this case, the ridge strip is selected to match the color of the roofing.

Now, regarding the shape of the product. There are three options: corner, rounded and U-shaped.

The first is a piece in the form of a corner with rolled edges. The simplest option, without claims to high aesthetic forms, but also the cheapest, because their production technology involves bending a galvanized strip to the required angle.

The second is a more aesthetic form in the form of a gutter with shelves for fastening, which have rolled edges. It is these models that form a large ventilation pocket underneath. In addition, such ridge strips must be closed on the sides with plugs. Despite the high aesthetics of rounded skates, their price is also high, of course, in comparison with other options.

The third option is the most interesting from the point of view decorative design roofs. But its production requires a lot of metal, plus shaped plugs, which adds up to the high price of the product.

As for the sizes of ridges for a corrugated roof, the length varies in the range of 2-3 m. But the width is determined by the angle of inclination of the slopes, so in this regard the range is wide.

On our website you can get acquainted with the most . In the filters you can set the desired direction, the presence of gas, water, electricity and other communications.

Ridge strip installation technology

Let's start with the fact that corrugated sheeting is a profiled material. That is, its shape is rounded or trapezoidal waves. The ridge installed on them provides 100% ventilation. It is adjacent to the upper waves of the roofing material with mounting shelves, and is attached to them, and through the space formed by the planes of the lower waves and the ridge flange, air escapes from under the roofing.

But this free space is a place where dust, insects, small birds, debris and other troubles fly under the roof. Today this problem is solved by installing a special sealing material between the ridge strip and the corrugated sheet. Essentially, it is a tape made of porous material that, when compressed, forms a dense protective barrier.

Types of ridge seal

Manufacturers today offer several types of skate seals made from different materials.

Polyurethane foam seal. This universal material with open porosity and long service life. The presented model line has a self-adhesive option, which increases the convenience of installing the tape on profiled sheets.

Polyethylene. This is a curly type seal that exactly follows the shape of the profiles. The material is dense and rigid with closed pores. Holes are left in it for ventilation. But they can be kept in closed state, if aerators are installed on the roof: pitched or ridge.

PSUL tape. This is a self-expanding seal made from acrylic and polyurethane. It goes on sale in compressed form. After installing the ridge, it expands, completely filling the space between the roofing material and the ridge. By the way, the material expands 5 times from its original state.

Please note that almost all seals completely close the gap between the ridge strip and the roofing material. Therefore, in most cases, roof ridge ventilation under corrugated sheeting is organized through side openings, which are closed with perforated plugs. Often they don’t even install plugs.

Rules for installing a ridge strip

Installation of a roof ridge made of corrugated sheets begins with choosing the type of ridge strip. Then you need to decide on the number of items to purchase. Everything is simple here. You need to know the length of the ridge run, which is divided by the length of the strip. Be sure to take into account the fact that the elements are mounted between each other with an overlap of 15-20 cm. That is, the number of joints will increase the span length. Therefore, they do it simply; they add one more element to the calculated quantity.

I would like to draw attention to two points regarding the formation of the ridge run:

Edges of profiled sheets should not cover the ridge run. The distance from the edge of the laid sheets to the top point of the roof is 5-10 cm.

It must be placed under the upper edges of the roofing material. continuous lathing of two boards lying next to each other. The bottom line is that the ridge on a roof made of corrugated sheets is attached not to the roofing material, but to the sheathing.

And one more no less important point. The line of intersection of the slopes should be smooth. The error is allowed, but not more than 2% of the width of the mounting shelf. For example, if you plan to install a ridge strip 2 m long with a mounting shelf width of 20 cm, then the deviation from the line of intersection of the slopes should not exceed:

20x2%=20x0.02=0.4 cm.

If this parameter does not meet the required standards, then the likelihood that the roof will leak exactly at the place where the ridge strip is installed will be quite high. This problem is solved in two ways:

The most difficult– reposition the roofing material.

Simplest– choose a ridge strip with a larger width of mounting shelves.

Installation of planks begins from any edge of the roof. First, the seal is installed. There are two methods used here:

glue the seal to reverse surfaces mounting shelves;

glued to itself roofing material.

The first option is simpler and more convenient to implement.

Lay the first plank. It is attached to the sheathing through the upper corrugations of the corrugated sheeting using roofing screws. The fasteners are screwed in every 30-40 cm with a distance of 2-3 cm from the edges of the shelves. Then the second one is mounted with the edges overlapping. The mount is exactly the same. And thus all the other elements.

pay attention to correct selection length of the fastener, because screwing is carried out into the upper wave. Typically this parameter consists of the wave height of the profiled sheet and the thickness of the sheathing.

Video description

The video shows the sequence of installing a ridge strip on a roof covered with corrugated sheeting:

Conclusion on the topic

So, we figured out the structure of the roof ridge made of corrugated sheets. We decided on the types of ridge strip shapes and the method of its installation. In fact, this element is included in the category of “most important additional elements” of the roof structure. Without it, the roof will simply be unfinished.

Quality roofing for your home is a guarantee reliable protection from leakage and destruction, which will primarily provide coziness and comfort.

Steel is one of the most durable and durable materials, but its only drawback as a roofing material was its weight. The combination of heavy sheets added up to a huge mass, which negatively affected the roofing frame. The problem that arose was solved by corrugating a steel sheet, which, having a low weight in relation to its size, retained its strong and rigid qualities thanks to the trapezoidal profile design - and this is how corrugated sheeting came into being.

For several years he recent years has gained great popularity due to its practicality in use, as well as minimal harm to the environment.

Corrugated sheeting - what is it, its pros and cons

Profiled flooring is produced by cold rolling from a sheet of hot-graded steel. During production, it can be treated with several layers of protection to increase strength and durability. At the initial stage, the workpiece is treated with anti-corrosion phosphate and only then primed. Top part The sheet is covered with a mixture of polymers, and the bottom is covered with a special varnish.

Thanks to the work done, the result is durable material High Quality, which combines many more advantages than negative qualities.

Material service life;
Competitive price with other types of roofing materials;
Material weight;
Simplicity and time saving during installation and dismantling;
Resistant to temperature changes.

The disadvantage of corrugated roofing is the low level of noise absorption, due to which sound insulation is significantly deteriorated.

Types of corrugated sheets

The widespread use of corrugated sheeting and not only in roofing has divided all its types into three classes:

N - for coatings and ceilings, as well as permanent formwork(the best roofing material). Additional stiffening ribs, thickness and height of the corrugation make it the most reliable and durable option.
C - for fencing fences and walls. This option costs much less than the previous one. The sheet thickness is smaller, and accordingly the service life and reliability are significantly inferior.
NS - combined corrugated sheeting. The brand is also often used in roofing work, but in most cases for non-load-bearing roofs. It all depends on the angle of the roof slope, which is a lot important factor in winter. A thin sheet of steel and a flatter roof structure can lead to fatal consequences under snow pressure.

Roof angle

For correct installation corrugated sheeting, you must first take into account the slope of the roof. This will help calculate the required amount of overlap with the adjacent sheet.

If the roof slope is less than 15° or more than 12°, the overlap of the sheets should be at least 20 cm;
In cases of inclination angle 15°-30° - from 15 to 20 cm;
A roof slope above 30° allows you to reduce the overlap to 10-15 cm;
A slope angle of less than 12° requires additional work to seal overlaps using silicone sealant.

Preparatory work

Before the installation process itself, it is worth carefully and correctly calculating the amount of roofing material and its type. You can do this yourself or use the services of a company whose manager will help you.

During transportation and loading, avoid strong bends and ensure flat surface means that will transport the material.
Manual unloading requires one worker for every 2 m of length. When using lifting equipment, it is necessary to use soft slings.
Transportation to the roof should be carried out using a log to connect the edge and the ground, not exceeding the norm of one sheet.

You will definitely need such tools as: tape measure, hammer, hacksaw, cord, rack, drill and drill bits.

Waterproofing and ventilation

Moisture released from the premises of the house always collects under the roof. To prevent this, it is necessary to organize the roof so that the temperature outside and under the roof are the same. To achieve this goal, you need to take care of proper vapor and heat insulation, as well as ventilation.

Waterproofing is most often installed before attaching corrugated sheets to the sheathing.

where 1 is the rafter leg; 2- waterproofing; 3- rafter strips (concrete lattice beams); 4 - sheathing.

Advice from the professionals: waterproofing film install it so that it hangs slightly, approximately 20 mm, in a position perpendicular to the roof slope. Installation should begin from bottom edge roofs to the ridge. Its overlap, sealed with adhesive tape, should be 100-150 mm.

Method of laying film on rafters:

To ensure the most efficient movement air flow From the eaves under the roof ridge, ventilation holes are arranged between the ridge strip and the roofing sheets. In places where air flow is difficult, it is necessary to do more additional channels for ventilation. However, the most in a simple way is placement wooden slats directly onto the waterproofing layer.

Rafters and sheathing

Rafter strips or steel purlins are mounted on top of the hydro- and vapor barrier if the profile height is 40 mm. Next, a sheathing is attached to them in the longitudinal direction, the pitch of which depends on the type of corrugated sheeting.

To organize the sheathing you will need:

timber measuring 50x50 mm;
board 32x10 mm;
moisture-resistant plywood sheets with a diameter of 10 mm.

There are two types of lathing: solid and thinned. The first type is installed on ribs, ridges and around chimneys. The thinned pitch is 50 mm. Lay the boards at the same distance, this will facilitate the entire further process of attaching the corrugated sheets.

Be sure to treat all wooden parts with an antiseptic and fire-fighting mixture.

Experts advise laying a so-called diffusion gasket on top of the sheathing, which will prevent the formation of condensation. It is fastened with small nails with a wide head.

The arrangement of the sheathing should be treated with special responsibility, since the reliability of the entire structure largely depends on it.

There are also no exact standards for the thickness of the sheathing; everything depends on the same parameters of the profiled sheets and the length of the fasteners. Minimum dimensions The cross-section of the sheathing becomes 32/100 mm. The board that is located along the cornice should be slightly thicker than all the others. Near the chimney it is necessary to organize the fastening of additional boards.

Eaves overhang

Lay the bottom row on the sheathing roofing sheeting, while forming eaves overhang. Its dimensions depend entirely on the height of the profile sheet.

However, initially it is necessary to take care of the eaves strip, which must be arranged below the waterproofing layer. This is necessary in order to wastewater and the resulting condensate entered the cornice strip, along which they flowed into the catchment, and then along drainpipe. Otherwise, water will flow down the walls of the house, which will cause negative consequences.

Installation of corrugated sheets

It is worth immediately noting that the installation of corrugated sheets should be carried out strictly according to the instructions.

Cutting corrugated sheets

Of course, it is better to purchase corrugated sheets on the market that match the size of the roof, but often these two parameters do not correspond, so you need to know how to cut correctly and what tool is best to use for this.

The material must be adjusted on a flat surface, for example, on the ground.

For these purposes you can use various instruments, however it is best to use electrical devices like a drill with a disk attachment. If you couldn’t get such a tool, you will have to cut it manually using steel-based metal scissors or a fine-toothed hacksaw.

It is prohibited to use mechanisms with an abrasive cutting disk, for example, a grinder, to cut corrugated sheets. The reason is that such devices emit relatively large heat energy during operation, which negatively affects the performance of the material.

When cutting roofing material, the edges will not be damaged without damage, so it is necessary to take care of the paint in advance to match the color of the corrugated sheets.

We lift corrugated sheets onto the roof

When lifting corrugated roofing sheets onto the roof, difficulties often arise due to the dimensions of the material, so for comfortable work it is best to carry out this stage of work using logs.

They should be installed in such a way that one side rests against the ground, and the other directly against the eaves of the roof slope.

The distance between the planks should be slightly less than the width of the corrugated sheets themselves. Thanks to this system, two people can easily lift roofing sheet for further installation. You can replace the logs with a regular staircase without railings.

Fastening corrugated sheets

Roofing with corrugated sheets should be done following the following technology:

The sheets should be secured using hexagonal self-tapping screws 80 mm long and a sealing gasket. It is worth remembering that you should not over-tighten the screws, as this can lead to excessive density of the gasket, which may result in damage to the waterproofing layer.

The sheets should be fastened at the bottom of the wave, and in ridge elements and in places of overlap - at the top.
It is best to start installation from the end of the ramp. The side overlap should extend halfway across the sheet wave. However, if the slope is flat (the angle of inclination can vary from 8 to 120 degrees), then to avoid leakage the overlap should extend to 1.5 waves.
At transverse and longitudinal joints it is necessary to make additional sealing using self-adhesive tape or bitumen mastic.
The front parts of the roof should be equipped with wind linings that will protect the corrugated roofing from destruction and blowing. They need to be secured using self-tapping screws, the pitch of which is 200 mm.
Depending on the wave height, the length of the self-tapping screw L is selected, which is equal to:

L= L1+H+L2, WHERE

L1, L2 - respectively, the profile thread (about 25 - 30 mm) and the thickness of the washer with seal (about 3-4 mm), H - the height of the corrugation.

For 1 m2 you need to use approximately 5-8 self-tapping screws.

Installation of corrugated roofing - video:

Making a pediment cut

To prevent corrugated sheets from breaking during strong gusts of wind, it is necessary to properly equip the gable cut.

If the allowance of corrugated sheets from the front of the house is 50-70 mm, then a wind lath with dimensions of 25x80 mm is used, which is attached using self-tapping screws. If the allowance from the front of the house is insignificant or not at all, then in addition to the slats, it is also used wind bar. It looks like a regular steel angle. It must be fastened in increments of 200-300 mm and with a transverse overlap of 100-150 mm.

To connect the slope to the wall, use corner strips. The planks, regardless of the type of connection - longitudinal or transverse, should be mounted using self-tapping screws with a pitch of 200-300 mm and an overlap between these planks of about 100 mm or more.

Transverse connection to the wall:

Longitudinal connection to the wall:

Installation of ridge and snow barrier

Begin installation work related to fastening the ridge on the side that is less susceptible to gusts of wind and leaders. For example, if for your area the predominant windy side is considered to be the west, then it is better to start fastening the ridge from the east. It can be simple, figured or tiled. The ridge is fixed using self-tapping screws with a pitch of 200-300 mm, and do not forget about the sealing gasket and ventilation gap.

A snow barrier is especially important during a thaw; it prevents avalanches from falling snow from metal roofing. It must be installed slightly below the edge of the roof across the roof slope. Fastening is carried out in pre-mounted beams.

Roof insulation from corrugated sheets

To insulate the roof you will need mineral wool and a vapor barrier. Along with mineral wool, you can also use durroy insulation, but this is the most effective.

And so... we go down from the roof to the attic and we can begin the final stage of arranging the roof from corrugated sheets.

Mineral insulation can be rolled or sheet, whichever you choose - it doesn’t matter, since both have excellent performance properties. It is mounted in the gap between the rafters; any method can be used to attach it - screw it with screws, fix it tightly with thread, or glue it. The main thing is that any of them perform their functions, and at the same time do not unnecessarily compress the seal, since it is not the cotton wool itself that holds the cold outside, but the air that is located in it.

2-sheathing; 3 - seal; 4 - ridge; 5- layer of waterproofing; 6.7 - rafter strip and leg, respectively; 8 - mineral wool; 9- vapor barrier; 10- ceiling rail; 11- lining or some other finishing material; a - roof ventilation; b - ventilation between waterproofing and mineral insulation.

A vapor barrier should then be attached on top of the mineral wool. It is necessary to prevent moisture in the air from entering the insulation, as this can significantly reduce the performance properties of mineral wool - the more moisture it absorbs, the more difficult it will be for it to retain heat.

It is worth remembering that the entire roof space does not need to be insulated, but care should be taken about the so-called cold triangle. The space located at the top of the roof at a distance of 300-400 mm must be left untreated mineral wool, since this cold triangle will promote good air circulation in the attic and in the interior of the roof.

Installation of a roof made of corrugated sheets is also allowed on an old roof that meets all its operational properties; this will increase its thermal insulation properties.

The cost of installing a roof made of corrugated sheets primarily depends on the complexity of the structure, dimensions and, of course, on the roofing material itself.

Caring for corrugated sheets

This roofing material is not at all fussy to care for. However, it must be handled with particular care, as profile sheets can be easily damaged. Before installation, do not place them on the ground, but rather use a special wooden stand for this purpose, the boards of which are about 25 cm thick and located in 50 cm increments. At least once every six months, do a general cleaning of the roof from dirt, sheets and other “pests”.

If scratches appear on the sheet, there is nothing to worry about, since the zinc layer located under the plastic will protect the corrugated sheet from rust, and the damaged area can be treated with paint of the same color.