Aerators for flat roofs. Installation of aerators on a soft roof: installation of under-roof ventilation devices Roof aerator TechnoNIKOL

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Roof aerators are elements designed to remove overpressure water vapor from under the roof covering. Typically used in ventilated roofing systems in conjunction with rolled materials that allow partial gluing or mechanical fixation. Most often, such products are made from polyethylene. low pressure, as well as aluminum or of stainless steel. Their installation has a great influence on the condition of roofs during their operation and extends the service life of structures.

There are several reasons why roof aerators should be installed on flat roofs:

to remove water vapor that rises from interior spaces buildings, is absorbed into materials and over time leads to the appearance of cracks and gradual destruction of the screed, and also contributes to the development of fungal infections;
to prevent the formation of condensation on the surface of the waterproofing layer;
to reduce pressure inside the roofing structure caused by the evaporation of moisture when the temperature rises, because its excess leads to the formation of bubbles, delamination of the roofing carpet and the appearance of other defects on the surface of the soft roof.

There are different types of aerators; they differ in material of manufacture, size, modifications and principle of operation. It is necessary to select the diameter and number of such elements taking into account two main criteria: the roof area and the technical characteristics of the devices. These calculations are made at the design stage of the roof and the entire building.

Types and design features of roof aerators

There are several types of aerators for soft roofs, which you can buy in our store, and at the best price:

Point aerators For flat roof– are a pipe with a diameter of 6.3 to 11.1 cm. It is protected from above by a cap or “umbrella” to prevent water from entering it during precipitation. Point aerators for pitched roofs - made in the form of “ boxes” painted to match the color of the roofing.

Continuous - they are placed along the roof ridge. They are produced in the form of ridge elements or breathable but moisture-resistant ventilation strips. Used on pitched roofs.

The price of aerators is in a fairly wide range. Today there are also simple ones on sale budget models made of plastic for 300 rubles, and more expensive devices made of aluminum with extended functionality almost three thousand.

The main purpose of the aerator for roof ventilation is to remove moisture from under roof space, as well as ventilation of all layers of the roofing cake. Soft roofing is the most sensitive to moisture. Its design is a multilayer structure, in which materials are laid in layers. The basis is reinforced concrete slab coating, it acts as a barrier between internal part indoors and outdoor environment. During operation, the roof covering may swell and peel due to the penetration of moist fumes from inside the building. To prevent such situations, aerators are installed on the roof as a preventive measure.

How does the aerator work?

The device is very simple. It consists of a piece of pipe, a tight-fitting skirt for attaching to the roof and a cap or cover. In terms of design, there are many solutions. The principle of operation of the aerator is based on the difference in pressure inside and outside the building. That is, moist air is removed naturally through the aerator pipe, and fresh air comes in its place. The most favorable place to install a roof aerator for metal tiles is considered to be the space at the ridge.

Individual elements of the deflector are made of materials resistant to:

acid and alkaline influences;
ultraviolet radiation;
temperature changes, the material should tolerate equally well subzero temperatures and heat;
corrosion.

The most the best option Today, durable technical plastics and stainless steel are used.

Roof aerators on flat soft roof usually installed evenly over the entire surface of the roof. It is considered the norm to install one aerator for every 100 m2 of roof area. Whatever the roof covering and roof design, you should not do it yourself. The number of devices and their design are determined by professional calculations based on initial data. These are:

roofing area;
specifications roofs;
layer-by-layer composition of the roofing pie and its condition;
level of moisture concentration inside the building and under the roof.

For very specific premises, with a high level of humidity, all calculations regarding the number and location of installation of aerators on the roof are carried out at the design stage. It's about about baths, saunas, swimming pools, laundries. Although every builder should consider installing this necessary fixture, it will help extend the life of the roof.

Features of installing the aerator

First let's decide on constructive solutions. Aerators can be point or continuous. The first ones are located over the entire surface of the roof; they provide ventilation to individual sections of the roof. The installation of second aerators on a soft roof is carried out along its entire length, so that it is possible to ventilate the entire roof.

Point devices are manufactured in two versions:

Pitched ones are installed on a continuous roof surface. Places for their location are chosen where it is necessary to increase air movement. Individual components of complex roofs require special attention: valleys, skylights, lanterns, combs. In these areas, it makes sense to install aerators for soft or other roofing on both sides of the obstacle.
The skating ones are mounted on the ridge. Mass of warm humid air, as a rule, rises up from the inside of the premises and goes outside through the ridge structures. At the same time, the eaves ventilation ducts supply portions fresh air from outside. In this way, the air mass is renewed. Ridge aerators for soft roofs help enhance these processes, as well as remove bitumen fumes from roofing material.

The installation of aerators can be carried out during the construction of a building, during the replacement of roofing, or as an independent procedure for an existing roof. You can install an aerator for a flat soft roof yourself, but it is still better to entrust this matter to specialists. The process itself looks like this:

First you need to determine the installation location of the deflectors and choose their design.
A window 10-20 mm wider than the diameter of the pipe is cut out of the roofing.
The entire thickness of the resulting hole must be generously coated with bitumen mastic.
The roof aerator pipe for a soft roof should be treated in the same way.
The pipe is inserted into the window, secured, and then the entire structure is assembled.

Fastening to the main covering is carried out using special roofing fasteners (screws, dowels). Particular attention should be paid to the interface between the aerator and the roof. To guarantee, it is better to lay an additional layer of waterproofing or roofing material under the aerator skirt.

Advantages of roofing with aerators

The aerator itself does not perform the function of a fan and does not remove moisture. Its main task is to promote high-quality air exchange and maintain humidity levels within normal limits. As a result of the interaction of deflectors with cornice and ridge channels, internal cavities dry out faster roofing structures. Natural air circulation is enhanced.

Properly installed roof aerators serve as a good guarantee that moisture from the outside will not penetrate under the covering. However, it will help the flow of moist air from the premises and under-roof space to escape. This simple solution helps preserve the roof and significantly extend its service life.

The device requires virtually no maintenance. This is a completely autonomous device. Unless from time to time you need to check whether birds or random debris have gotten inside. The pipe should not become clogged.

People living in their private homes may encounter a problem such as the accumulation of excess moisture under the roof. This has a bad effect on the properties of the thermal insulation layer. There is a cardinal solution - dismantling the roof and then replacing all the insulation. This method is quite expensive and time consuming, not to mention the fact that it cannot be used in every season. The second method is to install a device such as a roof aerator.

Roof aerators, what are they?

A roof aerator is a device that is designed to provide ventilation to the space under the roof. With its help, you can avoid the accumulation of moisture, extend the life of the roof and preserve its properties. This process is called “aeration”, which is where the name of the device comes from.

Aerators are designed to ensure air condensation and are installed directly on the roofing. Since roof structures and covering materials vary, aerators have their own installation and operation features for each type.

Principle of operation

Roof mounted aerator

The operating principle is based on one of the laws of physics, in which excess moisture can be evaporated - this process directly depends on the speed of circulation of moist air. The air temperature outdoors and indoors varies greatly, and therefore there is a need to ensure diffusion processes during which mixing occurs different types gas environment. This can lead to a drop in indoor temperature, and moisture will collect under the surface of the roof. Upon contact with the external environment, they will create ideal conditions to squeeze it out. It is on this law that the principle of operation of the device is based; in fact, it all comes down to using an aerator for ventilation.

Important! Aerators come in both iron and plastic, so before installing them you need to calculate whether the roof and corrugated sheeting can withstand the load from the device.

There are several varieties that will suit different roofs. For example, aerators for metal tiles, flexible tiles and others are sold. If you do not know how to properly install these devices, then it is best to use the services of a specialist.

Aerator for pitched roof

A pitched roof has a sloping surface. However, the space in attics often becomes difficult to navigate and often resembles a warehouse. It follows that the need for insulation and installation of additional ventilation disappears completely. The optimal angle for this roof is usually in the range from 30 to 50 degrees. On pitched roof the snow does not actually accumulate, since it simply rolls down, but there is an unwanted load from the winds.

Note! A roof aerator is usually installed exclusively on insulated roofs directly above residential premises.

Installed aerators on a pitched roof

The supporting structure consists of timber rafters and sheathing. The insulation is usually placed between rafter legs And inside, after which it is insulated using a vapor barrier coating. In any case, there is humidity in the air of a living room; the coating protects the insulation from moisture. A special film against moisture and water is installed on the outside, which protects the insulation from rainwater and condensation.

At first glance, the structure has no flaws, but not a single coating is capable of absolutely protecting the roofing pie. Consequently, moist air accumulates and stagnates under the roof covering, which causes wood to rot and steel to corrode. Installing aerators helps combat this problem, as the devices create fresh air circulation.

Important! For this type of roof, 2 types of aerators are installed: point and ridge.

Point-type devices are mounted at the highest point, approximately 150 mm from the ridge. The air outside is colder, and when it gets into the under-roof space, it becomes warmer; accordingly, according to the laws of physics, it tends to rise upward. As a result, simple air circulation occurs.

Flat roof aerator

IN flat options the roof has a different structure: the floor slabs are leveled using cement-sand screeds, after which insulation is laid. Then another cement-sand screed is mounted on top of the insulation, or two layers are used flat sheets from asbestos cement. After installation, the welded roofing carpet is firmly bonded to the screed. However, during operation, materials may experience changes in ambient temperatures. Coefficient thermal expansion for concrete, cement, asbestos and bitumen varies quite a lot, so unwanted stresses result from this. Adhesion and connections are disrupted, and air bubbles appear accordingly.

Flat roof aerators

Important! Aerators on a flat roof are mounted under the built-up layers, which allows you to remove stress and remove bubbles. IN in this case preferable to use roof aerator for a soft roof or an aerator for a flat roof.

Aerators that are used for roofing made of bituminous materials of a guided nature are not particularly special. design features, they consist of the usual elements:

skirts;
tubes;
cap

Typically, aerators are made of high-strength polypropylene and can withstand temperatures ranging from -50 to +130 degrees Celsius. Such roofing devices with an area of 80–100 m² should be located at a distance of 12 meters from each other.

Advantages and disadvantages

The main advantage of the devices is the ability to remove most of the moisture, which helps to avoid damage to the roof. This leads to the durability of the materials and even protects the roof from leaks. Removing moisture may cause metal shingles to not corrode or cause the problem to occur later. Plus, a dry roof better retains its thermal insulation properties. This will make it possible to seriously save on heating. This also helps to maintain a favorable microclimate in the building, which, in turn, helps to avoid the appearance of fungus and mold.

Also aerators are quite a budget option to eliminate unwanted moisture in the roofing pie. In 2018, their cost varies from 300 rubles to 5,000 rubles per piece. There is a huge variety of aerators on the market now. different companies, both foreign and domestic.

Important! The device is suitable for installation on any type of roof and can be combined with all types of roofing materials. Installation can be carried out on roofs of complex shapes where there is a difference in height. The aerator can be installed at any stage of construction or during the operation of the building. Installation does not require special skills or tools.

One of the disadvantages is the inability of point aerators to provide proper ventilation of the entire roof covering; this can lead to the appearance of an area where air will stagnate.

Classifications

Aerators have many classifications. Below is the most popular:

Best models

There are many devices on the market designed to remove moisture from under the roof. Below are the most popular ones in Russia.

"Polyvent"

The Polivent aerator is a line of devices for ventilation of the roof space. It contains both ridge and point aerators. The manufacturer of this line is the TechnoNIKOL company from the Russian Federation.

Docke

Products of this German company Designed for installation on horizontal skates. The Deke ridge aerator provides excellent ventilation and is of unsurpassed German quality.

Airridge Felt

Aerators from the Finnish company SKTuoteOy. They are made using new technologies, which helps to avoid deformation of the ridge, and the unique arrangement of air grooves ensures best ventilation and prevents moisture from getting inside from precipitation.

Tegola

Special aerator "Tegola" is a device Russian production, perfectly protects against moisture and ensures excellent air circulation.

Vilpe

Devices from the already well-known Finnish campaign SKTuoteOy. Available in a large selection of colors, the devices are characterized by ease of installation, corrosion protection and durability.

Ridge Master Plus and Hip Master

Pair American companies, producing mainly high-quality ridge aerators that effectively eliminate condensation and regulate the microclimate.

Aerator Ridge Master Plus and Hip Master

"Aquasystem"

The KTV Aquasystem aerator is a machined model from the Russian manufacturer Stroymet. It has proven itself well on the market, is easy to install and functions properly for many years.

Installation of roof aerators

Each type of aerator has its own characteristics and installation methods, which are described in detail in the instructions for them.

Installation of ridge aerators

This type of aerator is the easiest to install, but due to the fact that it must be installed along the entire length of the ridge, you need to have exact dimensions roofs and correctly calculate the number of devices. They are recommended to be installed on a roof with a slope of 12-45 degrees.

Important! This aerator is mounted exclusively on the ridge, which ensures excellent air circulation in the attic.

Operating standards:

It is imperative to have holes on the overhangs to promote air flow.
Installation of devices along the entire length of the ridge so that they form one system.
Tile ridges are usually placed on top of aerators, thus masking the devices and not damaging them. appearance roofs.

The installation technology is carried out in compliance with the following steps:

With help circular saw a groove is cut out at the base for ventilation and other needs of the system. If only 1 aerator is installed, then the hole should be located at the top of the ridge, if two - on the sides of the ridge. The slots are made in such a way that they break off 30 cm from the edge of the ridge.
Ridge shingles should be located on the sides of the ridge.
All segments must fit together, using the example of construction kit parts. The aerator is attached to the roof using special nails extended type or screws.
The aerator profile is covered with tiles. The petals are attached with an overlap.
Afterwards, it is necessary to seal the ends of the aerator where it comes into contact with the roof.

Installation of point aerators

If it is not possible to install ridge aerators, then they can be replaced with point ones. You need a few more of them, but you also need to calculate the area for mounting them.

As a rule, they are used:

On roofing coverings, where the slope is less than 12 degrees, or on flat structures.
For greater efficiency ventilation system or as a supplement.

A hole is cut to fit the internal gap of the channel next to the aerator.
Afterwards, the aerator skirt is mounted, which is secured with special roofing nails or other fasteners.
The top of the skirt is glued with waterproofing materials.
The skirt is glued with shingles, slightly trimming at the points of contact.
The aerator mesh is placed over the skirt and then secured with self-tapping screws. Afterwards, the cap is installed and also secured with fasteners.

Thus, using the tips and instructions, you can quite successfully install aerators of any type of model on different types roofs The devices will improve the moisture situation in the house and extend the life of the materials from which the roof is made.

All roofs with a rigid internal frame have one common quality - condensation periodically accumulates in the internal passages and threatens the supporting structures with premature rotting and destruction. In this article we will talk about such a useful invention as a roof aerator, which provides ventilation and maintenance truss structures in dry form.

Application with soft roof

Please note that installation of the aerator is possible even on flat roofs. In the case of a soft roof, a roof aerator prevents swelling of the material. The principle of this simple mechanism consists of removing moisture until it crystallizes under the roofing material. Thus, peeling does not occur soft covering from the frame structure.

Ideally, the installation of aerators on a soft roof should be carried out simultaneously with the construction of the house. This will save you from mold and rotting roof beams. However, even if these devices were neglected at the beginning of construction, they can always be installed later - this is not at all difficult to do.

Soft roofing is currently a fairly popular and actively used roofing material. It is laid on a reinforced concrete base, on which layers of insulation, waterproofing and cement-sand screed are applied. As a rule, the waterproofing layer is represented by roll materials.

Why do you need to install a roof aerator?

Depending on the quality of waterproofing and insulation work, as well as laying a soft roof, its service life may vary. Among the most common defects of such roofs is the accumulation of condensation in the insulating layer and screed. This problem can be eliminated with the help of a roof aerator. It allows you to reduce the moisture content in the roofing pie and prevent its further accumulation. Therefore, many reasonably believe that thanks to these devices it is possible to significantly extend the service life of a soft roof.

The formation and accumulation of condensation can ultimately lead to the following consequences:

Swelling of a flat roof.
Increase in thermal conductivity.
Defects in the screed or roofing pie.

The most common problem is roof swelling, the causes of which can be:

Temperature increase in summer period leads to heating of bituminous materials and changes in their structure, namely an increase in plasticity. In this case, the degree of viscosity of the mastic at which the roofing material was laid will matter.
Vapor accumulation in the space under the roof. Since the roofing pie consists of a lower vapor barrier and an upper waterproofing layer, when the temperature rises, the liquid accumulated between them is converted into steam, creating excess pressure.
Delamination of the roofing cake and bitumen-polymer composition. To get rid of swelling of the coating, the waterproofing must be carefully glued to the base. You can also use a roof aerator.

An increase in thermal conductivity entails significant heat loss and additional energy costs. According to studies, an increase in roof humidity even by 1-2% causes an increase in thermal conductivity by 30-40%. In addition, warm and humid environments are conducive to mold growth.

As for the destruction of the screed, the reason lies in the porosity of the material. In the normal state, the pores in cement mortar filled with air. If the roof has excessive moisture, these pores begin to fill with condensate, which expands as the temperature drops and leads to the formation of cracks and defects in the screed. In this case, the waterproofing layer may also be affected.

When choosing plastic roof aerators in each case, it is necessary to determine what caused the increase in humidity.

Reasons for increased humidity in the under-roof space

Moisture can get inside the insulation from the external environment due to defects and problems in the roofing pie. In addition, it can accumulate due to the destruction or damage of the vapor barrier layer. One of external factors the insulation may become wet due to difficult weather conditions and high humidity air.

In cases where the insulation layer accumulates too much water and, therefore, does not have time to fully dry out, it will be quite difficult to cope with the problem without additional devices. A similar situation is observed in the case of roofs that are constantly exposed to wetness. In this case, achieve positive results almost impossible.

Ultimately, the insulation will have to be replaced, for which the roof will need to be almost completely disassembled. This process will require too much material and labor resources, which not every owner can do.

To save money, you can get rid of excess moisture in the roofing pie by evaporation. In this case, all the complex and expensive work of dismantling the roof and replacing waterproofing and insulation simply will not be necessary. In addition, thanks to drying, there will be no fear of leaks, which usually occur after roof repairs.

Alternatively, you can use an aerator for ventilation. The operation of such devices is carried out due to the difference between the internal and external pressure of the air masses. Thanks to this principle, a draft arises in the aerator tube, which is created due to a decrease in pressure under the influence of wind flows from the outside.

To understand why you need a roof aerator, here are the main functions of this device:

Removal of steam-saturated air coming from the interior to the outside. This process occurs constantly, therefore, moisture does not have time to accumulate on the frame structure.
A decrease in internal pressure in the thickness of the roofing pie, due to which, as a rule, swelling of the finishing roofing material occurs.
Preventing liquid crystallization and its accumulation in the lower part of the waterproofing layer. Otherwise, condensation penetrates into the thickness of the insulation and leads to the loss of the material’s qualities.

By design, an aerator for a roof made of metal tiles or any other material is a pipe with a cross-section from 63 to 111 mm. An umbrella is installed on top of the pipe to prevent precipitation from getting into it. Typically, a roof aerator is made from polyethylene pipes HDPE.

Rules for installing roof aerators

The technology for installing roof aerators consists of several steps:

A window is cut through the thickness of the screed to install the ventilation pipe. Its depth should reach the inner layer of insulation.
The condition of the insulation should be checked - wet material is removed and replaced with dry material so that its thermal conductivity meets the requirements of the standards.
Now the aerator pipe is fastened. To do this on her bottom part first apply a layer of mastic, and then screw it to cement screed using six self-tapping screws. Screw the screws into the aerator skirt at the same distance from each other.
To prevent water from seeping under the device, an additional layer of waterproofing is laid on the base of the ventilation pipe.

To understand whether an aerator is required for a metal roof in each specific case, it is worth considering a number of factors. In particular, the type of structure and size of the roof, the level of humidity in the premises, as well as the reliability and condition of the vapor barrier layer of the roofing cake are important.

For houses with flat roofs, which do not have complex lines and are manufactured in compliance with all construction standards, the norms for the number of aerators on the roof require the installation of one device for every 100 m2.

At the same time, the distance between individual aerators should not exceed 12 meters. On roofs where the valley and ridge are clearly marked, the installation of ventilation pipes should be carried out along the passage of the ridge and in the valley itself at the boundary of the watershed.

Please note that if the building is initially planned to be used in permanent high humidity, for example, for saunas, baths or swimming pools, then special design offices should be involved in calculating the number and location of aerators.

Of course, you can install roof aerators yourself if you have at least minimal construction skills. However, you can also use the services of professional builders who will do everything quickly and efficiently.

How roof ventilation works

As has already become clear, the design of the aerator does not provide any mechanisms that would remove excess moisture from the roofing pie. These devices are something like ventilation ducts providing air exchange. The unhindered entry of fresh air into the space under the roof helps remove excess moisture and maintain the humidity level within acceptable limits. Thus, the main task of aerators is to ensure the flow of air under the roof without interference.

The functionality of the device is maintained in all weather conditions. The fact is that the humidity of freely circulating air will in any case be lower than that of air masses that are concentrated in a confined space under the roof. Ventilation pipes can ensure that excess moisture from the outside does not enter the under-roof space, and excess humid air can freely leave the roof.

It is obvious that ensuring high-quality roof ventilation is quite feasible. All you need is to install a roof aerator. This way you can be sure that moist air will not stagnate under the roof, but will be able to circulate freely.

It is noteworthy that the roof aerator does not require special care - you just need to check that the passages are not clogged. Overall, this is a very simple and reliable device that successfully solves the problems of excessive moisture and allows you to extend the life of any roof.

In order to use a soft roof for a long time and, no less important, safely, you need to take care of proper ventilation under the roof. The lack of ventilation of the space under the roof is fraught with a lot of troubles - from leaks, the smell of dampness to the very rapid destruction of the roof covering material, which, believe me, is not cheap at all. Installation of aerators on a soft roof is one of important elements, but not used by everyone. We want to show the necessity of its device.

The problem can be solved by installing aerators on a soft roof. The air circulating through these artificial ventilation ducts prevents the accumulation of condensation and, accordingly, protects wooden elements from rotting, mold formation, dries out the insulation layer of the roofing pie, as well as more.

Thus, the presence of ventilation aerators for a soft roof protects it from damage and guarantees comfortable accommodation in the house.

Why does moisture condense under the roof?

Even the presence of vapor barrier and waterproofing in the roofing pie cannot completely block the access of wet vapors, human waste products, from residential premises.

When warm steam comes into contact with a colder surface, then, as is known from physics courses, it begins to condense, forming tiny drops of water. They settle on various materials and structures (rafters, insulation, etc.) and impregnate them.

Moisture can get into the under-roof space and outside. Warm air, accumulated in the attic, warms up the roof from the inside, which is why the snow cover on the roof begins to melt in winter. As the temperature drops, ice forms in some places. Under appropriate conditions, it also melts. Water penetrates through the joints of the roofing material, and the roof thus begins to leak.

The covering on the roof also suffers. When the temperature drops, moisture penetrating into the formed microcracks can destroy the material. As a result, microcracks become visible, perhaps even through.

The most common defects on soft roofs caused by excess moisture are:

Bubbles on the surface. Usually, upper layer In the pie of such a roof there is waterproofing, and the bottom layer is a vapor barrier. Essentially, they form a closed, airtight loop.
In hot weather, the temperature of the roofing pie can reach as much as 100°. Under such conditions, the water accumulated in the circuit turns into steam, ready to evaporate. This can cause swelling on the surface or destruction of the roof.
The efficiency of the insulation decreases. Wet thermal insulation loses its effectiveness: getting wet by two percent increases the thermal conductivity of the insulation by forty percent. As a result, the roof begins to retain heat much worse. Accordingly, the cost of heating increases.
Floors are destroyed. The structure of the cement-sand compositions from which they are usually made is capillary-porous. As soon as the temperature drops, the water trapped in these pores crystallizes. Having increased in volume, it presses on the pores from the inside with greater force. As a result, they are destroyed.

What is the essence of roof aeration?

Excess moisture from under the roof is removed through evaporation, which becomes possible due to the movement of air flows. Pressure levels inside and outside the house differ greatly, so air will begin to circulate as soon as the two environments are connected.

Creating effective ventilation for a cold attic is quite simple. It is enough to limit yourself to a dormer window, cracks in the ridge area or a loose fit of the eaves overhangs.

In the case of warm attics or attics, such a solution is unacceptable, since in the cold season, unregulated ventilation will cause a decrease in the temperature in the rooms.

The best option for them are roof aerators for soft roofs (photo below), through which the spaces under and above the roof are connected. In the passage pipe of the aerator for flexible tiles, a forced draft is formed, caused by the pressure difference, which helps to draw wet vapors out.

aerator for flexible tiles

In order for roof ventilation from a soft roof to function normally, an air supply from the outside is necessary. They enter through ventilation gaps (vents) provided on the eaves. The air coming from the street in the process of passing through warm attic heats up, then rushes upward - directly to the roof. Draft formed in the roof aerator , removes the air flow through the passage pipe and exhausts it outside.

On a note

Ridge aerator for soft roofing correct installation in one hour, it passes air twice through the eaves vents on the eaves and layers of the roofing pie, drying and ventilating it.

Installing aerators on a soft roof in the required quantity ensures dryness of both the roof covering and the insulation. It is noteworthy that ventilation of a soft roof through a roof aerator can prevent the accumulation of moisture under new roof, as well as drying an old cake that has already been saturated with moisture.

Types of aerators

There are three types of installations that work to ventilate the under-roof space:

Continuous ones are mainly mounted on the ridge. The model must be positioned along the entire length of the junction of the slopes. Externally the structure looks like corner element with holes. Open cavities are protected by barriers that prevent precipitation, dust and insects from entering the roof.

Point aerators are located in separate areas of the roof where the removal of moisture and steam is most necessary. Most often these are stingrays, less often - skates. They are installed in a certain order. Each such construction is nothing more than ventilation tube with protective cap. Usually the latter has the appearance of a “box” or “fungus”.

On a note

The point pitched structure is connected to the roof by means of flat base, ridge - has an angular base, through which it mates with the roof near the roofing rib.

Turbines are the most powerful: they extract moisture both from the roofing pie and from the premises of the house. To extract moist air, the device is equipped with an electric drive. Models of this type are selected taking into account the slope of the slope. It should also be noted that they are not suitable for installation on slopes with a large angle of inclination.

It is important to note that each type of roof covering requires an aerator made of a specific material. Let's look at a few examples. Let's start with bitumen shingles.

The roof space aerator in this case is made of polypropylene, which is highly impact resistant. In addition, it successfully resists temperature changes, ultraviolet radiation, and corrosion. As a rule, slab joints or the highest elevation of the slope are chosen as installation locations.

For metal tiles. The aerator is made from metals that are resistant to various aggressive influences, including corrosion. Install on almost any part of the roof.
For a professional sheet. The installations are made of the same material as in the previous case, only it needs to be installed closer to the ridge.

Design features suggest significant differences in the approach to installing aerators on soft roofs.

Installation of aerators on a soft roof step by step

Let us remind you what an aerator is (look at the photo). This is an artificial ventilation duct that works both to draw moisture out from under the roof and to circulate air.

Let us consider, separately, how each type of aerator, ridge and point, is mounted.

The design of the ridge version is extremely simple. It is suitable for roofs with a slope ranging from 12 to 45°.

A ventilation groove 30–80 mm thick is cut on both sides of the ridge or at its top for ventilation. The choice of specific thickness is initially determined by the manufacturer. To work with a solid base, use a circular saw.
The slots should end 300 mm short of the edge of the ridge and not violate the integrity of the slopes on both sides.
Ridge tiles are applied to the solid areas remaining along the edges of the ridge.
Then apply ridge aerator. All of its segments are fixed to elongated roofing nails or to screws, which are screwed through the finished holes on the part. The segments themselves are attached similarly to the parts of the constructor.
On finished design ridge tiles are laid. The installation principle differs little from the usual method: the only difference is in the fastening elements. These must be elongated fasteners.
The tightness of the structure ensures silicone sealant, with which its ends are sealed.

The video details the nuances of the process of installing aerators on a soft roof.

Diagram of a point ventilation device for a soft roof

The installation diagram for the point version is somewhat more complicated:

As you know, soft roofing is laid on continuous sheathing from plywood or OSB. A hole is cut out in it, deepened to the heat-insulating layer. Its diameter must exactly correspond to the dimensions of the internal opening of the artificial ventilation gap channel. If the diameter is smaller, then dents will begin to appear on the surface of the roof covering, where moisture or dirt will accumulate; if it is larger, then an additional sealing gasket will be needed.

If for any reason the insulation in this place is too wet, then it must be completely or partially replaced. In this way, it will be possible to maintain the thermal conductivity of the heat insulator at the proper level.

To mark, the skirt is placed on the sheathing, the contours of the ventilation duct opening are traced using a pencil or nail, and a hole is cut out using a jigsaw along the resulting contour.
An aerator skirt is placed on top of it, which is fixed with at least 6 roofing nails or screws.

According to the recommendations of some manufacturers, to increase adhesion, in addition to fasteners, they additionally use bitumen mastic. With this approach, first sealant is applied to the back side of the base of the tube and firmly glued to the slope, after which fasteners are used.

A protective frame is put on the skirt and screwed with self-tapping screws. After that, a cap is installed that protects the roof pie from the penetration of precipitation, snapped into place and secured with self-tapping screws.
The joint is sealed and an additional layer of waterproofing is required.
The installation of the remaining point models (according to calculations) is carried out similarly, which form a single ventilation system.
The tiles are laid on top of the skirt, cutting the petals along the abutment line.

When installing aerators, the size and shape of the roof, the state of the vapor barrier, and the degree of air humidity are taken into account.
It is recommended to install aerators for flat roofs with a simple configuration at the rate of 1 fungus/100 sq. m of roofing surface. However, they should be no more than 12 m apart from each other.
If the roof structure has valleys or a clearly defined ridge, artificial ventilation ducts are located in watershed areas.
Calculation of ventilated installation systems for buildings with high level humidity is best left to construction design companies.
Professionals recommend completing aeration systems from the same supplier. This way you can reduce the risk of problems occurring when defective parts are replaced.

The most popular brands of aerator manufacturers

One of the first models of the family of solid devices is the ridge. Let's start with him.

Ridge Master Aerators(USA) (Plus and other modification of HipMaster). The profile shape design, it is patented) eliminates damage.

Ridge Master models can only be installed on strictly horizontal ridges. They are not recommended for use on inclined ridges. Hip Master is suitable for these cases. Let us note some advantages of ventilation aerators from this manufacturer.

A special patented system for protection from precipitation and wind. She has special design internal partitions designed on a computer.
The protective frame is ultrasonically welded.
Built-in interlocking edges allow you to quickly and much more securely connect structural parts, increase resistance to weather influences, and ensure an accurate fit to the slopes.
The aerator successfully resists crushing. It features support for fasteners and specially designed ribs to keep the roof line level and smooth.
The structure does not form dents, for example, from branches or cracks when sharp changes temperature, it is resistant to hammer blows.
Manufacturer's warranty – 40 years.

TOawning aerator for soft roofing TechnoNIKOL– completely similar to Ridge Master, but differs in length. Ventilation efficiency: approximately 1 element/25 sq.m.

TechnoNIKOL company also offers various options point models. Here are some of them.

KTV pitched. Used exclusively on roofing coverings of their bituminous shingles. They are attached to the roof through a passage element during installation. soft tiles. The device is difficult to notice on the roof. Ventilation efficiency: approximately 1 element/5-10 sq.m.
KTV-alpha. This is an economical version of the pitched model of the KTV aerator for flexible tiles. Protected from weather influences and insects by a polyurethane (reticulated) filter. Ventilation efficiency: approximately 1 element/20 sq.m.
Pilot pitched. Used on roofs covered bitumen shingles. It is attached to the roof through the passage element directly during the process of laying the roofing material. The lower sliding element allows it to be fixed strictly vertically at any roof slope. Ventilation efficiency: approximately 1 element/5 sq.m.

Finnish manufacturer SK Toute offers a wide range of purpose aerators. Vilpe Vent models fundamentally different from products from other manufacturers:

Exclusively high quality materials used, which ensures excellent characteristics of such systems: exceptional resistance to aggressive environmental influences and ultraviolet radiation.
They are reliably protected from corrosion.
They are universal, that is, they can be installed on any roofing system.
High degree soundproofing.

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