The correct ventilation system should work independently, providing a natural air movement from below up. In this way, it turns out to normalize the circulation of air masses, which is responsible for venting the house and underground space.

On the types of ventilation, devices for its ensuring and how can be done on the roof ventilation yourself - this article.

Types of ventilation

According to construction standards, each residential building should be provided for at least three ventilation channels:

• fan - to remove air from sewage.
• kitchen, basement, channel in order to remove air from the bathroom or residential rooms - these elements provide ventilation at home and normalize the microclimate in the rooms, remove the exhaust air with an increased moisture content, garnet or kitchen smells and so on.
• canal for roof ventilationWhich is needed to ventilate roofing pie and attic room.

Important! Methods and installation sites of ventilation channels can be different, but most often it is customary to withdraw them to the roof.

It has been established that the natural thrust will be sufficient to ventilate the house with a height of pipes more than two meters. That is why, most often, the pipes are installed on the roofs of houses. Besides familiar round pipes Square box or mines, flat aerators or compact deflectors can be used - all these elements are needed to enhance the air flow.

The correct ventilation system is easily checked by its performance. Quality roof ventilation in winter time Must prevent the freezing of roofing cake, the formation of a land and frosting from the inside of the roof, the penetration of cold air inside the house. At the same time, in the summer, a cool microclimate should be maintained in the subcircular space, the air-hectled air should be replaced by fresh portion of air masses from the street.

Ventilation of the house and its rooms is tested by normal temperature and humidity - in the summer in the house should be cooler than on the street, and in the winter it should be kept warm.

Important! If mold appears on the walls or ceiling, condensate accumulates, this indicates a violation of normal air circulation, including the irregular operation of the ventilation system.

Elements to improve ventilation

Natural thrust based on the difference in the height and pressure of the air column is often not enough to ensure normal air circulation in the underpants space or in the house.

Insufficiency of circulation leads to such consequences as:

• condensate accumulation and mold appearance;
• rusting of metal parts and roof designs;
• crossing concrete structural elements
• rotting and drying wood;
• watering insulation, its damage and inefficiency.

All this will soon lead to impaired integrity of waterproofing and the appearance of leaks in the roof. This means that the roof will have to be repaired or change, so much more efficiently install a good ventilation system.

Special elements are used to enhance the thrust:

1. Aerators look like flat plates - lining. In this device, low pressure is constantly maintained, the air in the aerator is cutting. Due to this, the difference of pressures is easily created - from the underpants space, the exhaust air is displayed quickly and easily. Elements may differ in size, as well, for different types of roofs, they will need a different amount. The installation of aerators on the roofing of the roofing between the devices should not exceed 12 meters. Installation is made on the most high Points Roofs, it is better for this to choose the insulation jacks.
2. Sking Aerators necessary for scanty roofs. These elements are mounted along the ski line, ensuring the enhancement of natural ventilation of the underground space. The skate aerators are combined with any roofing materials, they are especially important for roofs covered flexible tiles. But the slope slope must be defined - from 15 to 45 degrees. On such roofs, the equipment of the skate products is initially assumed, aerators are inserted into these grooves. At the roof repair stage, you can cut a plot under the air force with a jigsaw or another element. Be sure to follow the tightness of the skate aerator, because it is installed in the center of the roof - incorrect installation will lead to leaks.
3. Deflectors work on the principle of convection - wet air and steam with the help of these devices are derived from roofing pie, providing its drying and ventilation. According to the construction standards, at least one deflector should be installed for every 100 squares.

To remove the ventilation channels on the roof, it is necessary to make a preliminary calculation.

Attention! Often all ventilation moves leading from different parts of the house are combined into one mine. As practice shows, this method will only be effective with a very competent calculation and installation of all elements of the system. Doing everything with your own hands, it is better to bring three separate ventilation channels to the roof.

The error of calculations or installation will cause the kitchen smells, the "aromas" of the sewage, the microclimate and circulation of flows in the undercase.

When the roof ventilation is needed

With what any residential house Ventilation is needed, it is difficult to argue - it is always performed in the form of hearing windows, products, channels in the walls or with the help of special electrical devices that enhance traction.

But to ventilation of the underpants, not all owners belong to the required seriousness. However, there are types of roofs that must be equipped with a separate ventilation system:

• flexible roofsThey need good ventilating due to their design features. The fact is that bituminous tile Mounted with glue, for the normal strength of the roof, the shape of the crate must be minimal. The most effective solution is a solid income from moisture-resistant plywood, shot down boards or OSB-plates. This design does not have natural gaps, the tile material itself does not pass the air - this will lead to the stress of air masses, a violation of the microclimate under the roof and even in the house. To avoid this, the gaps are performed on the frontows, along the cornice line and in the ridge of the roof. Complement the ventilation with special elements (aerators, deflectors).
• roofs of the attic type Also need enhanced ventilation, because it is supposed to accommodate people who need a sufficient amount of oxygen and fresh air. But the main function of the system in such structures - heat saving in the cold period and maintenance of cool temperature in winter. It uses natural air circulation - a warm stream is supplanted with cold, which goes below. This method allows to enhance thermal insulation that mansard roofs Running directly under the ceiling. Be sure to need a vapor barrier membrane, which will remove wet couples from the residential attic to the street, at the same time protecting the inner surface of the roof and insulation from the accumulation of condensate.
• roofs treated with metalmust have the number of air ducts equal to 1% of the total area of \u200b\u200bthe skate. At the same time, the amount and dimensions of the uniforms for the supply air must correspond to the auditory windows for the outflow. The distance from the insulation to the roofing sheets should not be less than 5 cm, so for the crate chosen the ram with the corresponding thickness.

How to install ventilation on the roof

The ventilation channel is usually paved in the walls, so the ventilation pipes are mounted on that part of the roof that rests on the bearing walls of the house. It should be understood that high pipes and boxes installed in the highest part of the roof are essentially a sail. A strong wind has a large pressure on these systems, can lead to the destruction of ventilation. Installation of pipes over carriding walls enhances the entire design.

Deciding with the installation site, you can start the installation of the ventilation system:

1. Purchase the necessary ventilation elements corresponding to the roof material, the size of the skates, shade.
2. IN roofing material Perform a hole. The pattern is applied to the roof, which usually goes in a set with ventilation elements, mooring it with a marker and cut out.
3. The same cutout must be transferred to all layers of roofing cake.
4. In accordance with the same template, the holes for the self-tapping screw are performed.
5. The surface of the roof is cleaned and degreased.
6. The gasket, going in the set, from the inside is treated with a sealant. Connect the contours of the seal with a cut in the roof and press the gasket.
7. Apply the ventilation element to the seal and fixed with self-draws.
8. In the passage element insert the pipe and check its verticality.

Important! The reliability of the installation of the ventilation element should testify the surplus of the sealant, squeezed out from under the gasket.

Conclusion

You can remove ventilation to the roof with your own hands. At the same time, it is necessary to comply with all construction standards and the installation rules of the system.

Some owners of the land in the city decide to build a bathhouse, but at the same time do not take into account some nuances. In particular, many forget that for furnace installation It is necessary to install a box for chimney. Some private builders do not even know what kind of device, and others simply do not give it values. From this article, you can find out what this design is intended for. After all, the battery life and quality of water procedures depends on the parts. It should be noted that not everyone can cope with this task and make such a box with your own hands. In fact, it represents two designs intended for different tasks.

Initially, the box is designed for output of the chimney through the roof or overlapping. A secondary function is to decorative decoration Roof element in order not to disturb the overall design of the structure. To perform work with your own hands, you need to learn more about each form of construction.

Terkesolation

Smoking pipes can be outside. If in the steam room it is necessary to maintain heat as much as possible, it is recommended to spend the chimney on the room. It should be borne in mind that the chimney will pass through ceiling overlap And roof. Therefore, you need to install special casing do it yourself.

This design will protect rafters from high temperatures in chimney. As a result, the fire safety of the building is ensured.

The distance from the surface of the chimney to the ceiling materials depends on the type of chimney pipe and should be 15-25 centimeters. Empty space must be filled with an insulator, which can be performed. Additional waterproofing of this distance is not required.

It is important to note that in order to avoid the roof of the roof, it is necessary to secure the waterproofing around the perimeter of the entire box, as well as press the trained cladder to the rafters. Indoors, on the ceiling, you need to fix vapor insulation layer With the help of conventional nails, and then install the finishing material.

As a result, such a wooden casing will protect the ceiling materials from high temperature effects and will also provide the necessary waterproofing overlap. Also, the box can be made from other non-combustible materials: Ceramics, metal.

Metal insulation

Such a design reliably protects the ceiling and a roof from possible ignition. Metal box is most often manufactured from galvanizing, metal sheets, stainless steel. The material thickness must be at least one millimeter. In the middle of the sheet you need to make a special hole for the output of the chimney.

Such a casing is possible purchase in construction and specialized outletswhere devices are implemented for furnace construction and bathrooms.

Installation can be made with your own hands. It is necessary to simply mount the design in the doorway on the roof, and then remove the pipe to withdraw the smoke through the casing. Hole in the ceiling must be made Between rafters.

Manufacturing a box

Some people are not solved independently make a device for chimney. However, there is nothing complicated. Therefore, anyone can make a metal casing. To do this, you can use Step by step instructions.

Before work, you need to prepare:

• Scissors for working with metal.
• Galvanized sheet.
• Drill.
• Compass.
• Ordinary self-tapping screws.

To begin with, you need to measure Hole between rafyles and cut it off. If it is supposed to withdraw the pipe through the wall overlap, the hole must be made in it. After that, follow the instructions below.

1. When the hole is restored, its edges are recommended to additionally strengthen with support bars. They will act as a support for the future box.
2. From galvanized sheet cut a couple of blanks that must be more hole 5 cm. The edges of the blanks need to bend away at a distance. 5 cm at an angle of 90 degrees. As a result, will be ready two metal strips of the P-shaped form.
3. These bands need to be consolidated using self-sides of both sides of the prepared hole in the ceiling.
4. At the next stage you need to prepare two more P-shaped stripes which are fixed in the hole vanosest Already installed metal sheets. As a result, a solid framing of the carved hole in the ceiling overlap is obtained.
5. After that, you need to prepare the bottom for the design. From the galvanized leaf you need to cut a piece, the dimensions of which correspond to the ceiling hole. Then in the center of Circle, mark the circle under the chimney hole.
6. From the center to the edge of the bottom need to be placed 4 mounts with a 2-centimeter width. Then cut them and beat at an angle 90 degrees. As a result, a metal plate with a hole and four strips for fixing should be obtained.
7. At the next stage, the bottom is attached to the walls. The casing through the hole is inserted with a chimney pipe and is fastened with a clamp. The free space between chimney and combustible materials is filled with a layer of isolation.

If you follow this instruction, it will not be difficult to make a box with your own hands.

In order not to break the overall design of the building, the roof box must be described beautifully with the help. It can be used for its manufacture various materialswhich are then decorated.

Exterior finish Allows you to improve the appearance of a brick or metal chimney pipe. It should be noted that in such a design you can hide ventilation and protect it from natural precipitation.

Metal chimney

In this case, the decorative roof box is recommended to make from gypsum Carton. But here you need to understand that the material can collapse in total at a temperature of 40 degrees. To avoid this, the metal pipe must be wrapped with a foil insulator. And between the chimney and the tube, leave a small layer.

After that, the design can be separated by stone, tiles or plaster. It should be noted that the metallic chimney will last no more than ten years, after which it will be necessary to dismantle the box. Also, the device can be made of wooden boards.

Brick chimney

An artificial stone can be used for finishing a brick device: a seven, sandstone, limestone and others. However, you need to have a certain experience in working with such material. It should also be borne in mind that not every stone is able to withstand a high temperature, so this decoration is not recommended to do with your own hands, but entrusted with a professional specialist.

Brick chimney can be issued using tiles. On the roof often laid ceramic tileTherefore, this option is the best. For this you need to make wooden framewhich is attached to a special tile using self-tapping screws. This finish will have thickness about 35 cm.

For lining of the chimney pipe can also be used plasterwhich is sold in the form of ready to dream. If cement plates are used for the roof, the chimney can be issued as the same material. Plates are resistant to UV rays and over time do not lose their color. In addition, cement plates are well tolerated the temperature differences, which is very important.

It is important to understand that the protective cover for the chimney on the roof is a significant detail of the bath and any other room. The quality of work will depend on fire safety paired room. If necessary, the manufacture and installation of the structure can be entrusted to qualified craftsmen, which for a small fee will quickly fulfill all the work.

Technological roofing structures from modern materials have high tightness and long service life. They differ from the less perfect predecessors, the absence of gaps, gaps and holes, which were not only causes of leakage, but also served as natural ventilation. Therefore, multilayer roofs of profiled metal, the device of which includes thermal insulation, vaporizolation, and waterproofing, require the installation of a forced ventilation system. In this article, we will tell how to equip a ventilation outlet for metal tiles to extend the service life of the coating and wooden elements of the roof frame.

Ventilation output For the roof is a device in the form of a small tube of metal or plastic, the diameter of which is in the range of 30-100 mm, and the length is up to 50 cm. It is installed in the immediate vicinity of the roof of the roof (no further 60 cm) to provide heated air, saturated with water couples, free exit from the interior of the house on the street. For compulsory equipment, circuits 2 types are used:

• Roofing ventilation. This system is intended to optimize the temperature and humidity in the ventilation gap of the roof. It solves the problem of refringing the thermal insulating material and wood of the rafter frame. Although the price of such a solution is low, it is rarely used to organize a ventilation exit for metal tile, since due to the heating of the inner surface of the roof, the formation of an ice crust occurs, which completely stops the air exchange. To arrange roofing ventilation, pipes are used, equipped with an elastic penetration and a deflector, such a length so that they reached the rafter.
• Through ventilation. Such a scheme differs from roofing the fact that ventilation outputs pass through roofing pie And go into the attic room. Pipes used for mounting through ventilation work as coaxial, the price of such products is higher, but high efficiency justifies these costs. Pipes have a special design - 2 independent contours are outlined excess moisture from roofing pie and provide air circulation in the attic.

Important! Universal ventilation outlet for the roof of metal tile - plastic or metal pipe The diameter of 50 mm with a protective deflector on the ledge. The price of such products depends on the material, size and additional functions that manufacturers offer. Effective is the ventilation exits equipped with mechanical or electric fans and air filters.

Functions

Universal ventilation exit must be installed on the roofs of the metal tile, since this material is made in the form of sheets of a large area, the seams between which are sealed in the installation process. There are 3 significant reasons why it is worth equipping roofing ventilation:

1. It prevents the wetting of the insulation, due to which the high thermal insulation properties of the material are preserved. Note that with increasing humidity of the thermal insulating layer, only 5%, the thermal conductivity of the material is doubled and remains so even after drying. Therefore, the installation of ventilation outputs, the installation price of which does not exceed several thousand rubles, is able to delay full replacement thermally insulating layer.
2. Roofing ventilation prevents the increase in humidity and premature wear of the rafter frame, which almost completely consists of wood. A tree is a material of natural origin, with increasing humidity, it suffers from rot and mold, which are the result of malicious microorganisms.
3. This simple measure, the price of which is less than 1/10 share of the total cost of construction of the roof optimizes and levels the temperature roofing. Due to the ventilation outputs on the surface of the roof, an ice-crust is not formed, overloading the rafting frame and the damaging coating of metal tile when scaling.

Professional roofers argue that for the roof with a slope of 20-30 degrees and an area of \u200b\u200bno more than 60 square meters. m is enough one ventilation output with a diameter of 50 mm. The larger and steeper the skates, the more pipes will be required. The universal set includes the pipe itself, the elastic casing, plastic penetration, protective deflector, template and fasteners. The exit price is 700-1500 rubles, depending on the material and functionality of the model.

Installation

Installation of ventilation outlets on the roof of metal tile is performed after the completion of roofing works. For installation, it will take hacksaw or scissors for metal, marker, drill, screwdriver, sealant on silicone basis. Works are performed according to the instructions in the following order:

Important! The price of installing each ventilation outlet of the roof from metal tile is 70-10% of the value of the materials. Therefore, it is more rational to carry out the installation with your own hands, turning special attention to the sealing of the seams, as well as the verticality of the pipe location.

Video instruction

• When the installation is required
• Types of chimney boxes
• Manufacture of wooden frame
• Manufacture metal box
  • Control stages
  • Chimney trim

The end of the work on the organization of heating in a private house is the installation of a box for chimney on the roof. From how high quality it is made, the reliability of the entire heating system will depend on.

Metal box allows protecting the pipe and slows down the destruction process.

When the installation is required

The influence of natural factors (wind, precipitation, etc.) lead to gradual destruction of the chimney. For example, the brick absorbs moisture well, which gradually accumulates inside and decreases the temperature to freeze, disrupting the integrity of the material. The box allows you to protect the pipe, slow down the process of destruction and give a pipe more aesthetic look.

The main function of the box is the protection of overlapping from ignition.

Installation of metal casing allows you to extend the service life of the pipe. Additionally, the box gives a pipe more aesthetic look and avoids periodic repairs.

Traditionally, for the manufacture of the box, materials such as stainless or galvanized steel are used, since they are resistant to moisture, corrosion, temperature difference. Materials have a high service life.

A variety of color options makes it possible to choose the optimal option without reducing quality characteristics.

Some types of coating are not consistent with the chimney style made of bricks. Installation of the metal box will be the right solution in a similar situation.

On a galvanized or stainless steel sandwich, it is not possible to make a brick tube. Galvanized pipe on the background of the roof will look like a separate element. Save the position can metal box of the same color as the roof overlap.

The type of destructive tube is unlikely to deliver pleasure. Therefore, it is worth installing a metal box that will hide the consequences of destruction and suspend them.

The destruction of the pipe reduces the safety of the use of the heating system, negatively affects the functional characteristics, reduces the level of thrust. Therefore, the metal casing will be a good option to protect the chimney.

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Types of chimney boxes

Diagram of the device of the passage of the pass through the roof.

The pipe output is a rather complicated process, since the incorrect installation of ventilation can lead to unpleasant consequences, up to a fire. Therefore, before removing the pipe, it is worth determining its design and ways, how to conduct a safe.

Many developers forget about such an important detail as a box. Under this term are understood by two absolutely different elements Roof: Device for chimney and decorative component.

The pipe that allows you to remove smoke from the room, is carried out both by the room itself and outside it. In some cases, for example, when conducting a heating system in the steam room, it is more appropriate to use the first option: it will be preserved more heat. But then to output the pipe will have through the roof. Therefore, a box is necessary.

Thanks to this device, the temperature will not affect the ceiling rafters, on the coating of metal tile and hydro and vapor barrier films. Well, if the hole is scheduled to be held during the construction of the house, in this case you can make a separate system of rafters for the discharge pipe.

The distance from the surface of the pipe to a combustible material depends on the height of the pipe, but in any case it is in the range of 15-25 cm. Then the free place around the pipe can be filled with a dense basalt cotton wool or other material, resistant to high temperature. This will not allow additional waterproofing.

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Manufacture of wooden frame

The frame is collected from a white boards with a size of 100x25 mm, on top are fixed by boards of the same size. A part of the box that will rise above the roof is shed OSB. The box is fixed to the rafters, if it comes to the attic overlap, then attach to it. After that, it is necessary to make a roof adjoining.

Proper elimination of the chimney through roofing pie implies the arrangement around the pipe of its own rafter system.

The insulating membrane is fixed on the upper layer, from above - siding. Over the box is mounted cover from snow and rain. After installing the pipe, it will need to be replaced with a metal cap.

In order for the roof over time, it does not start to leak, the waterproofing is attached to the rafters, then pressed the crate. From the inside, vaporizolation is established: the material is nailed to the rafters and pressed the finishing material.

The result of the work becomes a wooden box that allows you to isolate the overlap in the ceiling or roofing pie. At the same time, it has a fairly high level of waterproofing.

Wooden box will protect the ceiling overlap and roofing pie from the effects of high temperatures, while providing good waterproofing. Also, the box can be made of non-combustible materials, such as ceramics or metal. It can be made from the details of the professional flooring or from a solid metal sheet.

In order to make the adjuncing of the box to the surface of the roof of the metal tile, apply metal aprons with coloring. Such elements can be ordered or making themselves according to the scheme.

First you need to lay a lining carpet. The more its size, the better. Ideally, he must reach the cornice, and the occasion of the pipe should be at least 30 cm. The trunks fit to the bottom of the pipe. Then the aprons are installed: bottom and side, with a small adhesive to the bottom. The upper apron is mounted with the allen on the side. The pipe is placed in the roof.

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Making a metal box

The metal device can be purchased in the store specializing in the sale of goods for the roof, choose a model for any chimney. It is a box with a hole for a pipe made of a thin metal sheet (1 mm thick). The casing is usually made of galvanized or stainless steel. At the same time, it combines well with different ways Helling roof: glass wool, basalt wool.

This is a roof element that closes the chimney and the ventilation pipe. It performs a number of important tasks:

• heats the main ventilation pipe;
• allows you to provide high-quality exhaust;
• when the channel is installed on the collapsed wall, it allows you to strengthen the chimney;
• performs a decorative role.

If several gas ducts are installed on the roof, then the box should be installed on each of them.

Metal box is very simple and easy to use.

The scheme of its installation is very simple, you only need to correct it to the roof and through the chimney hole to remove the pipe.

For the manufacture and mounting through the roof of the metal tile of the metal box, the material, metal sheet, screws and tools are needed: Circle, screwdriver, scissors for metal.

Properly made ventilation exit to the roof will help avoid unnecessary problems and protect from many damage to the roof. IN modern world There is a huge variety of roofing coatings, but we will focus on metal tile - the most common. Therefore, let's see how you can make the ventilation pass through the metal tile.

Do I need roofing ventilation?

Some may have a question: why do you need ventilation and spend additional funds when you can do without these works. The answer is obvious. First of all, ventilation supports a beneficial microclimate inside the roof. This will help each of its elements calmly fulfill its work without fear of destruction. Also, the quality of the heat insulation depends on the ventilation, if you performed these works when installing the roof, given.

Incorrect ventilation operation or in general, its absence can lead to the following problems:

• Education on condensate materials. Wooden materials, for example, rafters and beams, will prematurely collapse or overheet. And condensate on metal and other elements will cause them corrosion, and in the future and complete destruction (read the article: "").
• Moisture is formed on the surface of the roof. This may already lead to the formation of a land and destroy certain types of roofing material.
• Condensation of steam on insulation. The insulation layer will wet and subsequently lose its thermal insulation properties. This means that with the insulation may be worse than without it.

Ventilation device on pitched roofs

So that the fresh air circulate under the roof, at the bottom of the roof you need to establish the so-called products. In this case, the air movement will ensure the injection of the undercase.

What tasks should perform ventilation pipes on the roof:

• First of all, it is weathered water vapor. The absence of a water vapor will not let him be condensed on some surface and thereby cause its destruction.
• Setting the temperature of the roof. Roofing ventilation exits must maintain the same temperature over the entire roof, then icicles and toes will not be formed after the snow melting on one of the parts of the roof.
• Reducing the amount of heat after heating the roof of the sun. The ventilation will not give the underground space strongly overheat on sunny days and will maintain a constant air temperature indoors.

To ventilate under the roof, you need to use a deflector - low pressure roofing fan. If necessary, it can be done, it will help remove all unnecessary moisture. IN modern construction Use various elements of roof ventilation. Often the inputs for air flows close metal grafts. If we talk about air outlets, they are divided into two categories: point and continuous. Point outputs are mounted on certain areas of the roof and look like. Continuous outputs are located along the entire length of the skate and painted in the color of the roof, which is unnoticed for prying eyes. That is why the ventilation fungus on the roof is so popular.

Installation of ventilation pipes, specialist advice:

How is the installation of ventilation?

Naturally, the setting of outputs implies drilling holes in the roof. But without proper care, they can turn into real holes, which later will cause the roof. To eliminate the likelihood of the roof leakage, you need to purchase special, suitable for color to general design.

Installing ventilation pipes on the roof for metal tile includes several important moments:

• For every 60 square meters there should be one output of point ventilation.
• The distance from the skate to the point ventilation element should be less than 60 cm.
• The complexity of the roof structure increases the number of output elements.
• When installing an item, a template must be used, which is usually attached with the delivery kit.
• Holes on metal tile should be located on one scheduled line.
• With the help of screws, you should attach a sealing rubber ring, and then apply a sealant from silicone.
• A passing element is installed in place, after which the element pins are connected to the sealer loops.
• All this design is fixed on the roof with the help of screws included.
• On the side of the attic for the waterproofing layer, the seal is nailed. If the ventilation pipes on the roof pass through the thermal insulation layer, this place should be additionally selected by silicone sealants and other seals.

The height of the pipe over the roof "). The use of high-quality materials for ventilation and adherence to all regulations of the ventilation will reduce the chances of problems to zero. Remember: Never save on installing any systems in the house! All work must be performed high quality and according to the instructions, then your home Will be "your fortress".