The junction of the protruding roof to the parapet drawing. Node of junction of the parapet to the roof

The parapet is an integral part of the roof of many houses, complementing their structure. It has a certain height, which can be different depending on the situation. At the junction of this protective curb with the roof, the roof adjoins to the parapet, which must be followed according to all the rules.

Although the parapet is not one of the main parts of the house, it does a good job of protective and aesthetic functions. It is a small wall that fits around the perimeter of the roof and looks like a building envelope. Such a design is arranged both on pitched and flat roofs. In the first case, the parapet is built above the cornice and is clearly visible from below. In the second case, a small barrier completely covers the roof from view. To prevent precipitation and air currents from destroying the parapet, this elevation is covered with an apron, which can be made of galvanized or copper sheet metal... Structurally, it is equipped with special drippers, with the help of which water is diverted from the building. Drippers prevent water from entering the protected areas of the parapet.

There are options for brick or concrete parapets, covered not with metal aprons, but with concrete slabs.

Principles of adhesion of the roof to the parapet

In order for aprons made of galvanized metal sheets to be securely attached to the fence, grooves and niches are created in the parapet structure. The upper edges of the aprons are inserted into these grooves, which are metal sheets bent into shaped products. Aprons can also be used for roofing made of black steel, but it must be painted on all sides using heated drying oil. Niches and grooves are provided for the construction of a junction device. It is known from practice that a single piece of roofing sheet is not enough. This is due to the fact that vertical sections are not always even. In addition, the fastening is negatively affected by unstable temperature regime and precipitation. Due to these negative phenomena, the apron may not fit snugly against the curb. With the help of grooves, these problems are solved.

When the edge of a sheet made of a particular material is inserted into a niche, its height must be at least 0.1 m.
In the case of using a groove to install the apron, the latter is closed cement-sand mortar, which protects the structure from precipitation.

At a distance of 1 m from each other along the length of the parapet, set wooden plugs soaked in an antiseptic. Bars are fixed to the plugs, which have the shape of a triangle in cross section. From above, this design is covered with an apron.

Laying of the apron fragments is done in the direction into which precipitation will flow, while the overlap should be at least 0.1 m.
If the roof is flat, then its joint with the fence is covered with waterproofing in several layers. Mastic waterproofing needs reinforcement. Geotextiles or glass-based materials are best suited for these purposes. During installation, an overlap of 0.15 m is arranged. The material is pressed against the vertical surface through an additional side. Then the resulting structure is coated with an emulsion or mastic. After the fastening agent has cooled down, the second layer is laid on the first layer. To prevent the "layer cake" from slipping, it is fastened with a metal apron, which, among other things, performs protective function... The drawing well demonstrates how the abutment of mating surfaces works.

Adjacent device with soft roof

When installing a roll-type roof parapet, special attention must be paid to waterproofing - it must be reinforced. During installation roofing the material should be fed onto a vertical wall. When laying the material, a special support must be present at the junction of the surfaces.

In the absence of an auxiliary side, a vulnerable cavity is formed at the junction of the surfaces of the roof and parapet. In this place, the flooring under mechanical stress can easily be damaged, resulting in depressurization of the coating.

To avoid problems associated with damage to the roofing material, the joint between the surface of the roof and the parapet is laid with a support flange, which has 2 angles of 45º in cross-section. Its device is carried out from a mixture based on cement and sand. Instead of this support, you can place it impregnated with bio- and fire-retardant wooden bar OK, which in section has the form of an isosceles triangle. Thanks to such a side, the coating material will adhere tightly to the entire adjacent surface.
If waterproofing material is roofing material, then using hot bitumen mastic roll material must be glued to the entire surface of the roof, starting from its base and ending with the parapet wall, including the side. After a while, the operation must be repeated, covering the roof with a second layer of roofing material. During the erection of the parapet, a special groove is arranged in its inner surface. When making an abutment of two surfaces, the edge roofing material With outside is wound into the made groove. Possible junction knot with the establishment of roofing material on the upper section of the parapet.
If the edge of the roofing strip enters the groove, the material must be fixed with a metal strip, which will press the roofing material against the wall using dowels. This part and the joint are sealed with a sealant. The next layer will be paint that protects the structure from precipitation. At the end, a metal apron is put on the parapet, which can be attached to the bar.
In the variant with the installation of roofing material on top of the parapet, the roofing material is first fixed with heated bitumen, and then covered with an apron or slabs.

There are technologies for making the abutment of these surfaces using mastic agents with hydrophobic characteristics. With this treatment, the coating is created without seams, and the abutment is reliably sealed.

Video

Installation of the junction to the parapet, if a ventilated facade is made:

When erecting any building, special attention is paid to its roof and everything that is on it. The parapet is an integral part of the roof. What it is and how it works - not everyone knows, but it is this detail that makes a person's stay at an altitude safe.

Features and functions

Relatively recently, parapets on buildings performed only an aesthetic function. Now these devices are mandatory roof attributes, and this rule is spelled out in the corresponding GOSTs.

The main task of each type of fencing is to protect the person on the roof from falling. A secondary function is to protect the building from precipitation and any climatic influences. But constant improvement design solutions allowed the low wall, which runs along the perimeter of the roof edge, to play the role of decoration of architectural structures.

Parapets are installed on both pitched and flat roofs. In the first case, the structure is erected above the cornice and from below (from the ground) is clearly visible from all sides. In the second case, a low barrier completely closes the roof from human gaze.

To prevent the parapet from being destroyed by strong winds and atmospheric precipitation unfavorable for building materials, this elevation is covered with a special apron made of galvanized or copper sheet metal, equipped with drips, thanks to which the water that gets on the building is easily drained away. Drippers also eliminate the possibility of water entering the protected areas of the parapet.

Correctly assembled railing protects the roof from gusty winds, the force of which can deform and tear the cladding. Equally important and decorative use parapet. It refines the roof of high-rise buildings, hiding blocks of air conditioning systems and other communications.

To understand which version of the parapet to install on the roof, you need to find out all the possibilities of this design.

In addition to the listed features, the following points apply.

The parapet is used as fire protection system, preventing the ignition of roof materials.
It evenly distributes air flows around the entire perimeter of the roof, and the pressure on it is also distributed accordingly. The parapet prevents strong winds from lifting its edges.
Prevents various debris, branches and everything that may lie on the roof from falling down.
Hides equipment and devices on the roof that can disfigure from the view of people appearance roofs.

All parapets, without exception, have one structure:

shelf - the main part;
overhangs - are perpendicular to the shelf;
drippers (placed on the sides of the parapet) - are responsible for the drainage of rain and melt water.

Types and materials of fences

A wide variety of materials are used to create parapets: metal, reinforced concrete blocks, bricks and monolithic concrete... From above, the structure is covered with galvanized, metal profiles or concrete slabs in order to avoid the destructive effects of atmospheric precipitation. The profile surface can be horizontal, pitched or gable.

Modern construction provides for two types of parapets:

metal parapet grilles and hoods;
brick fence.

The configuration of the facade affects the appearance of the parapets. The latter can be straight, curly, radial or combined.

Protective panels (aprons) for the parapet are made of metal sheets with a thickness of 0.3-0.7 mm. They may differ in design and mounting option.

On these grounds, the following parapets are distinguished:

curly;
simple;
complex;
flat;
in the form of a skate.

The figured product looks like a railing. It features intricate lines and curves. A simple option is a combination of two ramps with a regular rectangular drip tip. In the complex version, the droppers are under the visor and bent inward, they are the most reliable and durable.

Droppers in flat models are also available with different sides... The last version of the parapet has a covered visor.

If the architectural creation is tall, for example, a residential multi-storey building or an office center, then you cannot do without an apron from precipitation. As a rule, this device is made of metal profiles, concrete slabs, steel sheets or copper caps.

As with any construction building, some requirements are also put forward to the parapet. If the height of the building is more than ten meters, then the presence of a protective structure on the roof is required.

Device

The fact of installing a railing on the roof does not guarantee absolute protection of people and the roof itself. A slight inaccuracy in the connection of the parapet system with the roof can cause the structure to loosen, and the material chosen at random will not be able to withstand corrosion processes. Therefore, it is important to be confident in your abilities, or to entrust the device of the parapet to the masters of their craft, who will accurately perform all calculations of the roof area, find out the average annual rainfall and calculate the water load on the surface of the building.

To install parapets and ebbs on the roof of even a low house, it is necessary to use expensive climbing equipment, the purchase of which for performing a one-time job is not as profitable as seeking help from professional installers.

A roof railing made of bricks, as a rule, is an extension of the brick wall of an architectural building, which is created after all the floors have been installed. At the design stage, it is necessary to determine the required height of the brick "side" so that during installation it is possible to make a special groove, which is necessary for the adjoining of the roof to the parapet.

To increase the service life, the parapets on the roof are covered with metal aprons. They are made from various corrosion-resistant raw materials: aluminum, galvanized metal, sheet copper (the most expensive options are patinated or oxidized).

The galvanized model can be coated with a special polymer coating, all other variations - paint.

After heat treatment roof rails become resistant to temperature changes environment, endure any negative effects of atmospheric precipitation, their service life increases. The advantage of these systems can also be called the fact that the color of the coating can be any, therefore, the caps can both stand out against the general background of the building, and vice versa: merge with it in a single color design.

Metal parapets are in great demand due to their ease of installation, while they perform their functions perfectly. The parapet is sheathed with precisely cut pieces of metal, and all joints are folded into folded locks. Thus, the maximum tightness of the structure is ensured, there is not a single hole or gap.

With the help of modern equipment, covers for parapets of any shape are made. You can purchase flat parapet, with slopes or non-standard configuration. The price of a finished parapet depends on the material of its execution, as well as on the complexity of the form.

Sometimes there is a need to repair protective structures. Such cases are not isolated, especially if the building has been in operation for more than a dozen years or the parapets were not initially protected by aprons. In this case, the repair - the right way return the security system to its former functionality and appearance.

Installation according to SNiP

According to SNiP, the installation of a parapet on the roof of a house with a height of more than 10 m with a slope of up to 12%. If the roof slope is more than 12%, then the fence can also be installed on the roof of a building less than 10 m high.

The minimum height of the parapet is 45 cm. The maximum value is also regulated by SNiP and is regulated by the figure of 1.2 m, no more.

If the roof is unexploited, that is, any work takes place on it exclusively at the time of repair and maintenance, then there is no need to install a parapet. Fencing is a personal desire of the developer.

An exploited roof often becomes a place for arranging viewing platforms, outdoor cafes and various recreation areas. Therefore, protecting people on the roof from accidental falls is essential. In this case, the height of the parapet should not be less than 1.2 m.

Adjacency nodes

On the different types roof junctions will be different. When decorating a parapet-type roof, all side surface fences 45 cm high must be completely covered with waterproofing material. To fix it well in place, mastic with bitumen in the base is used.

If the protective element has a height of more than 50 cm, the groove should be made at a distance of 25 cm from the surface of the roof base. In this case, the waterproofing insulation is equipped up to the groove into which the edges of the insulation are inserted. The junction of the roof to the parapet is made of bitumen mastic.

Many houses, especially multi-storey ones, are equipped with a special parapet on the roof. The height of such a structure may fluctuate, but in any case, it will dock with the roofing. In the article below we will tell you what the junction device is. soft roof to the parapets and what standards should be observed during installation.

Parapet structure

By design, the parapet is a low wall, equipped along the perimeter of the roof, which performs not only a protective function, but also serves as decorative element... The parapet can be erected on both flat and pitched roofs. If the roof is flat, then it is completely enclosed by the parapet wall.

In the case of pitched roofs, the parapet will be visible from below, since it is located above the cornice. The installation of a parapet made of galvanized steel or copper is carried out in order to protect the structure from the effects of wind and precipitation. As a rule, droppers are mounted on the parapet apron, which perform the function of draining water. Thanks to such devices, the parapet remains protected from moisture penetration.

In some cases, instead of metal aprons, concrete slabs are laid on a parapet made of concrete blocks and bricks.

Rules for arranging a parapet node

In order to be able to finish the parapet with galvanized steel, grooves and niches are cut through it. After that, the sheets of metal are bent, giving them the desired profile, and their upper edges are brought into the prepared grooves. Alternatively, the apron can be made of black roofing steel, but in this case it will be necessary to cover it with heated linseed oil on all sides. As practice shows, the device for adjoining the roof to the parapet in specially prepared niches makes the process more convenient and faster. Usually, one sheet of metal is not enough to organize a parapet assembly. Since the walls of the parapet are not always perfectly flat, additional overlaps must be created to cover them with an apron. Temperature changes, as well as rain and snowfall, also have a detrimental effect on the fasteners. As a result, the metal apron may come loose from the wall.

Using gutters, the junction of the roof to the parapet can be made as reliable as possible, observing the following rules:

The height of the niche into which the edge of the apron is wound should be at least 10 cm.
If a strobe was made in the thickness of the parapet, then after installing the apron, it must be filled with cement mortar to prevent the destruction of the entire wall due to rain.

Along the entire length of the parapet, wooden plugs treated with an antiseptic compound are fixed every meter. Triangular bars are nailed to these plugs, on which a metal apron is then laid. The sheets are laid with an overlap of at least 10 cm towards the gutter.

Contiguity flat roof to the parapet must be covered with several layers of waterproofing. When using mastic, reinforcement should be provided. It is best to use geotextiles or fiberglass materials. The insulation is laid with an overlap of 15 cm. The first layer of the material is pressed against the vertical plane through the rim, smearing it with mastic or emulsion. As soon as the first layer of mastic has cooled, another layer of insulation is laid. At the end, the resulting pie is attached to the roof with an apron.

Adjacent parapet and soft roof

If a soft roof is used to cover the roof roll coating, then the abutment of the roof to the parapet should be especially tightly waterproofed. For this purpose, the roofing material is brought onto a vertical wall during installation. In this case, a special support element is provided at the junction of the planes.

It is worth noting that if such a side is not provided, voids are formed at the point of abutment of the soft roof to the parapet, which will make the coating vulnerable to mechanical stress. In such a place, there is a high probability of damage and depressurization of the roofing.

Here are some rules for arranging the junction roll roof to the parapet:

It is possible to prevent damage to the soft roofing by laying a support flange in the form of a triangle with two 45º angles at the joint. You can make it from cement-sand mixture, or lay a wooden beam impregnated with an antiseptic and fire retardant. Thus, a snug fit of the roll material will be achieved to the entire surface of the support and parapet.
In cases where roofing material is used as a waterproofing material, it must be glued not only to the entire roof plane, but also to the parapet wall, inclusively with the supporting edge. For this, a preheated bituminous mastic... When the first layer of waterproofing cools down, it will be necessary to lay another layer of roofing material in the same way. During the construction of the parapet wall, with inside a special chute is equipped in it. During the arrangement of the abutment, the edge of the soft roofing from the outside is brought into this gutter and fixed. Alternatively, the roll material can be brought onto the upper plane of the parapet wall.
Provided that a strobe is made in the side, the roll covering that goes into it must be fixed on the wall using a metal strip and dowels. In this case, all joints and holes must be carefully sealed. After that, the area is covered with a layer of paint, which will protect the junction from rain. At the last stage, the parapet is covered with a metal apron, which can be fixed to the bar.
If the roofing material will cover not only the wall, but also the upper plane of the parapet, then first of all it must be glued with molten bitumen, and then covered with concrete slabs or a metal apron.

Modern technologies make it possible to equip the joints between the roof and the parapet using special hydrophobic mastic compounds. The result is a completely sealed, seamless finish.

The parapet is an integral structural element flat roof... The main function of this element is to ensure the protection and safety of people on the roof plane. The device of parapets is carried out using different techniques, each of which is selected individually for the type of roof. In this article, we will analyze the device of the roof parapets.

The device of a parapet on a flat roof allows the structure to effectively resist gusts and wind pressure. The absence of a parapet can cause the roofing materials to separate from the structure and form holes in the material. This structural element is erected from concrete, brick, metal or reinforced concrete. Experts note several types of parapet:

figured in the form of a railing;
with two slopes or simple;
complex, with a curved drip under the visor;
simple, where the edges of the dropper are directed in different directions;
the presence of a ridge with a lower attachment, which is covered by a visor.

For information! V multi-storey buildings use a galvanized sheet, metal profile or concrete slab, which perform the role of an apron and protect from snow.

As a rule, a brick parapet is installed after the ceilings are completed, their height is 0.5 m along its inner surface, where special grooves are left, into which the roofing carpet is introduced.

Design features

The design of the parapet is simple shelf with straight or curly bends that are located at an angle of 90 degrees. The main requirements for a parapet structure include the following:

the height of the entire device should not be less than 1.2 meters for the roofs used;
metal parapets are installed on a flat roof that is not used, while the height of the structure is less than 10 meters;
all junctions of the parapet and roof are closed with a waterproof carpet, which is fixed with special crutches;

For information! If the height of the building is 10 meters or more, the presence of a parapet is an obligatory structural element.

when using a PVC roofing or TPO membrane, the drip is attached by welding directly to the waterproofing carpet;
with a roof height of 45 cm or more, a protective apron is erected, which is fixed with self-tapping screws behind the pressure rail.

Important! All joints on the roof plane must be carefully sealed without fail. The sealant avoids the destruction of the roofing material and eliminates leaks.

Parapet device

The parapet is an integral element of any design, the requirements for which are regulated by building codes. An element consists of four key parts:

The presence of a fence- the fence is an elevation, height and width, which is regulated by building codes. Most often, fences are built of brick throughout the entire area of the house. The main task of the fence is to protect people on the roof plane;
The presence of a waterproofing apron, which is made of roofing material of the outer or lining type and is fixed with a metal strip over the parapet. Its main function is to exclude moisture from entering the roofing cake;
The presence of a roof wedge, whose main task is to protect the junctions on the waterproofing apron. They perform it from a bar and cement mortar... The wedge is mounted at the junction of the parapet roof surface with the obligatory consideration of an angle of 90 degrees between them;
The presence of a protective visor allows you to protect the building from the corrosive processes of steel elements. A visor is made from roofing steel, the installation is overlapped using a seam seam.

For information! Rebate seam - best protection roof structure from leaks.

Fences and their dimensions

The dimensions, width and height of the fences are clearly carried out, according to, building codes... The parapet provides safety for human life and health, therefore, its absence excludes the possibility of operating the building. Each type of roof allows its own values and requirements for the size of the railing. Parapet size requirements:

flat roof is unexploited, does not require mandatory installation of the fence, therefore the presence of a parapet is installed at the request of the developer;
an unexploited roof in a building whose height is 10 meters or more, the presence of a fence is required with a height of 45-50 cm.

The photo shows a parapet of a flat roof, which can be used as a terrace, a summer area for recreation

a flat roof in an operating building requires the mandatory installation of a parapet with a height of at least 1.2 meters; such a height, according to building codes, assumes the safe stay of people on the roof plane.

It is worth noting that a height of 1.2 meters can spoil outer building, therefore, experts recommend making fences in the form of a monolithic curb, on top of which special metal strips with horizontal lines are attached.

Roof abutment

When the ceilings have already been erected, and the roofing cake has been laid, it is necessary to take care of the reliability of the junction points. There are two basic rules for making a high-quality junction:

at a height of the fence of 50 cm, the groove is made 25 cm in size, the insulating material is fixed at the level of the groove height and fixed with a metal bar;
if the height of the fence is less than 50 cm, the waterproofing carpet is laid over the entire area of the lateral surface, and from above it is treated with mastic.

More details about the device of high-quality flat roof connections can be found in the video clip

Important! Avoid cracking, material shedding and moisture ingress into the layer roofing cake timely care and treatment of seams and abutments with bitumen or sealant will help.

If the roof is of a soft type, then the abutment is quite difficult to perform, the weak point of this structure is the presence right angle between the railing and the roof. For a high-quality abutment device, experts recommend reducing the angle of inclination to 45 degrees. This action will help to avoid deformation, cracking and freezing of the entire roofing structure. Pouring a concrete ebb at 45 degrees is performed using a wooden plank, which is pre-treated with antiseptics. At the final stage of work, the bar and ebb is covered with an insulating material that is overlapped.

Parapets have a protective, protective and aesthetic function. The presence of this structural element of the buildings in operation allows not only to protect the life and health of people, but also to minimize the risks of the formation of destruction of the insulating material and load-bearing elements of the structure. With well-made connections, the roofing plane will provide reliable protection from possible leaks and cracking of the roofing material.

The roofing system is one of critical systems buildings. Each element is flat or pitched roof, even if it seems secondary, has its own purpose, and contributes to the well-coordinated work of the roof structure as a whole.

Extremely important role in ensuring the reliability and functionality of the roof play typical units roofs, which are associated with the abutment of slopes, parapets, various technological communications, etc. The quality of the roof nodes requires special attention, since it is they who are considered the most vulnerable to atmospheric influences, destroying the roofing and waterproofing over time.

Let us dwell separately on some of the most important roof nodes.

Flat roof parapet and wall abutment assembly

Structurally, for the device of abutments to the wall, a steel apron or a special strip is installed. The vertical part of the latter is attached to the adjoining wall, and the horizontal part overlaps the roof.

The technology of the abutment device for various roof coatings differs only in the method of sealing the joints, which inevitably appear during their installation. It is on the quality of this operation in to a greater extent the impermeability of the roof depends.

Typical roof assemblies can be performed both with the device of an additional special niche in the wall, a groove, or without it. Sealants are used to seal the seams. Today, bitumen-containing compositions, popular at one time, have successfully replaced silicone ones.

Roof units covered with profiled metal, in areas adjacent to concrete or plastered brick walls perform as follows.

When using a single steel backsplash, wall chipping is required.
A groove 2-3 cm deep is made at a height of 20 cm or more, parallel to the abutment line.
One of the edges of the apron, the upper one, is installed in the curtain, and the lower one is attracted to the roof. They are pre-treated with a sealant.
Roofing screws equipped with seals are used as fasteners. The neoprene or rubber from which they are made effectively protects the attachment points from moisture.
The strobe is then filled with cement mortar.

If a special strip is used, then a wooden strip is fixed in the strobe.

The vertical part of the protective strip made of profiled metal is attached to it.
In the other part, it lies on the surface of the roof.
The strobe, as in the previous case, is filled with a sealant or cement solution.
Manufacturers offer planks different colors and, as a rule, problems with the choice additional element the color of the roof does not appear.

On a note

Waterproofing, if any, is brought under the bar and glued to a sealant, bitumen or silicone. The abutment strips are joined in length with an overlap of at least 10 cm.

This type of connection can also be made with a double apron. Unlike previous options no strobe is required here.

Having fastened the upper apron to the wall, the lower apron is brought under it and coupled to the upper one.
It is attached to the roof covering with clamps.
Everything connecting seams treated with an appropriate sealant.

For roofs made of natural tiles the abutment is performed using a special tape made of corrugated aluminum. It exactly repeats the profile of natural tiles. Butt joints are filled with hot bitumen, which reliably seals all joints, excluding moisture penetration.

On a note

Corrugated tape made of aluminum and mastic are also used for high-quality moisture protection of the joints of the roof, covered with soft tiles.

One of the simple and reliable technologies for making such a soft roof unit is flashing. The essence this method in execution following works:

application of elastic mastic with high hydrophobic characteristics;
reinforcement of butt joints with a geotextile layer;
reapplication of the mastic layer.

Roof with parapet and its abutment nodes

The technology for decorating the parapet knot is practically the same. However, being unprotected, the structure becomes unusable very soon. It is negatively affected by the impact external factors- precipitation, sharp temperature fluctuations and more. Particularly vulnerable in this sense brick buildings... In other words, the parapet needs protection. For these purposes, a kind of steel visor, equipped with special droppers, is being erected above it. It is through them that atmospheric precipitation is removed. Moreover, the probability of water hitting the parapet is negligible.

Chimney connections

Roof nodes of this type are characterized by the presence of high temperatures in the process of heating the chimney. That is why the requirements for tightness during its construction are not enough; non-combustible materials are needed.

One of the options in demand today is a roofing cut for a chimney, which may have different shape, dimensions and angle of inclination.

Another way of sealing is the use of a roofing apron made of metal of a special design, which allows you to protect the under-roof space from moisture penetration even in extreme conditions e.g. very heavy snowfalls or heavy rains accompanied by strong wind... If water nevertheless gets behind the apron, it will simply evaporate. The best results are obtained with double aprons.

Let us note some features of their installation to brick chimneys on metal roofs.

Internal apron. This element ensures the tightness of the abutment of the roof covering with the chimney located above the slope. The installation is carried out before the installation of metal tiles in the chimney area.

A steel profile apron is attached to the wall of the chimney and a mark is made along its upper edge. Along the line obtained, a groove is grooved on the wall, using a sling machine for this.
Work begins with the installation of an internal apron.
After cleaning the groove, insert its lower element into it and press it tightly, precisely aligning the upper part with the groove. Fasten it to the roof elements made of wood with self-tapping screws and seal it using a sealant. A flat sheet is brought under it, because of its shape it is called a tie, along which water should be diverted, and directed towards the cornice or valley.
Similarly, cut and install the apron elements on the sides and on top, overlapping adjacent parts with an overlap of at least 15 cm.

Outer apron. The installation of the outer apron is started after laying the roofing material. Its installation does not differ from the installation of the inner apron with the only difference that the upper edge of the outer one is not recessed into the gates. Instead, the joint is sealed using special sealants.

Roof slope abutment

Internal abutments of roof slopes or, as they are called, valleys, are considered the most difficult nodes, from a technical point of view. They are typical for roofs with complex shape, like, say, hip hipped roof... These areas are the most dangerous in terms of potential leakage hazard. A lot of various debris accumulating moisture, or ice, always accumulates here.

Waterproofing methods depend on the roof covering. General principle the execution of the nodes is reduced to the installation of elements of roofing iron under the covering, repeating the shape of the angle of connection of the slopes.

For metal roofs, standard lower valleys are used. Their edges are folded so that water cannot get under the covering. The joints are treated with a sealant or a self-adhesive porous sealant is used. The abutment on top of the roof covering is covered with decorative strips corresponding to the color of the covering.
For sealing roof assemblies made of shingles a continuous waterproofing carpet is laid on the valley.