The valve for a soft roof. Ventilated ridge for soft roofing: principles of arrangement and installation. Standard valves mounted together with a flexible roof

Like any other type of roofing, soft roofing requires high-quality under-roof ventilation for a long and reliable service life. And the best solution to this problem will be the installation of the Vilpe AIRIDGE FELT ridge valve.

The Vilpe AIRIDGE FELT ridge valve was specially developed taking into account all the features of a soft roof and allows you to provide reliable under-roof ventilation and protection of the roof from mold and fungi. The device has a simple and convenient design, it is easy and simple to install on an already finished roofing. The Vilpe AIRIDGE FELT ridge valve is made of reliable material, in a classic black color, which makes it almost invisible on the roof of the house. Another indisputable advantage of the Vilpe AIRIDGE FELT ridge valve is its cost, which is significantly lower than the cost of similar valves from other manufacturers.

In our online store, anyone can order the Vilpe AIRIDGE FELT Ridge Valve with home delivery. Also in the assortment of our store there are other Vilpe materials, as well as roof ventilation from other well-known manufacturers. The full range is presented in the corresponding section of our electronic catalog.

Valve size: 590 x 325 x 30 mm.

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When installing a soft roof, you should take care of its ventilation. That is, about the elements that start the circulation of air masses and continuous ventilation of all components of the roof, including insulation and rafters.

If the roof is pitched, then a ventilated ridge for a soft roof can solve the ventilation problem. It is equipped from ready-made ridge elements (aerators) or they are made with their own hands from improvised building materials.

A ventilated (breathing) ridge is equipped on the upper horizontal edge of the roof, along the line connecting the slopes. It differs from the usual ridge by the presence of through holes for the exit of warm air from the under-roof space.

A necessary component of this solution is the ventilation gap, which is cut along the roof ridge. A ridge element (usually triangular in shape) with perforations along the side walls is mounted on top of this gap. Its task is to close the ventilation gap, ensuring the tightness of the roof in terms of infiltration of atmospheric moisture and insects into the holes, and, at the same time, allow warm air from the interior to freely go outside. This ridge element, as well as the structure it completes, is called a ventilated ridge.

The principle of operation of ridge ventilation

Ridge ventilation operates on the principle of convection (mixing) of air masses. Warm, moisture-saturated air coming from the interior of the house rises up towards the roof ridge. There he seeks to find a way out. And it finds it if there are holes in the ridge (that is, if there is a ventilated ridge).

However, simply by providing perforation in the ridge, it is impossible to achieve ventilation of the under-roof space. Any ventilation system starts only if there is an extract and air supply. If a ventilated ridge is responsible for the hood, then the gaps left in the area of ​​the cornice overhangs are used for the influx of cold air.

To do this, perforated spotlights or ventilation grilles are used in the filing of overhangs. Now everything is put in its place. Cold air enters through the vents in the overhangs, heats up and is saturated with moist steam. Then it gradually rises up in the direction of the ridge and goes out. A draft is created and a new portion of cold air is drawn in through the vents. Thus, a continuous circulation of air masses and ventilation of the under-roof space is ensured.

And why is it necessary to ventilate the under-roof space at all? Maybe you can do without it? Let the warm moist air rise up and stay there ... Unfortunately, this option threatens with many troubles: roof leaks, deterioration of the thermal insulation properties of the insulation, rotting of wooden elements (rafters, battens), damage to bituminous tiles.

The fact is that warm, moist vapors that rise up and do not find a way out, condense in the under-roof space with a temperature difference between the street and the room. Steam forms many microscopic droplets of water that settle on the crate, rafters, and insulation. As a result, the rafter system begins to rot, the insulation is destroyed.

In winter, the accumulation of warm air in the under-roof space leads to a large temperature difference on the inner and outer surfaces of the roof. Snow on such a roof periodically thaws, forming ice and icicles. This causes the bituminous tiles to leak, damp and crack.

It should be noted that the construction of a ventilated ridge (and a forced ventilation system in general) is more relevant for warm attics and residential attics, that is, where insulation is laid in the under-roof space. Cold attics are perfectly ventilated through dormer windows.

Thus, a ventilation system for a soft roof with a warm attic or residential attic is a must. And the most effective way to equip it is to build a ventilated ridge, which allows you to ventilate the under-roof space along its entire length.

Ventilated skate options

A ventilated ridge is constructed in two ways:

1. A special ridge aerator is installed along the upper edge of the roof. It is a plastic element with a solid top and perforations on the sides. Inside the valve there is a filter that prevents precipitation, insects, dust from entering the under-roof space. The aerator can have a length of 0.5-1.22 m. For laying along the entire length of the ridge, the aerators are fastened together, obtaining a continuous ventilated element. So that at the end of the installation it is invisible on the roof, its plastic surface is covered from above with shingles of bituminous tiles.
2. A ridge with gaps is formed, which is a direct continuation of the roof structure. Bars are installed on the upper parts of the slopes (like a crate), from above they are covered with a triangular element made of plywood or OSB. Thus, gaps are formed on the sides of the ridge (between the bars), through which the exit of warm air is ensured. From above, the surface of the ridge, as in the first case, is covered with roofing material.

In any case, regardless of the version, the ventilated ridge must have the following properties:

• Let air vapor through. To do this, a ventilation gap of the required width (usually 40-50 mm) is cut on the roof structure along the ridge, through which free air exit is ensured. From above, the ventilation gap is blocked by a ridge element (aerator or home-made design) with air vents in the side parts.
• Protect the under-roof space from precipitation, melting snow. The design of the ridge should prevent the seepage of melt and rain water through it.
• Protect the roof space from dust, insects, small rodents.
• Allow excess moisture to evaporate from the room.

Consider how a ventilated skate can be arranged.

Installing a finished ridge aerator

This version of the ventilation ridge device is the simplest. It is a fastening (overlapping) of a ridge aerator along the entire length of the roof ridge, over the ventilation gap.

In this case, more than half of the success depends on the correct choice of aerator. In order not to get into a mess, you should focus on the designs of well-known manufacturers, for example, the Ridge Master and Ventline ridge aerators have proven themselves to be excellent.

The aerator installation technology usually looks like this. In the ridge, they initially form (leave free space) or cut out a ventilation hole, 40-50 mm wide. If a ridge beam is installed on the ridge, then two cuts of 20 (25) mm each are made - on both sides of the beam. In any case, the ventilation slot should not reach the edges of the slopes (gables) by 150 mm on both sides, so as not to disturb the cornice crate.

For roofs of complex shapes, slightly different clearance rules apply. On the hip roof, two gaps of 20 mm are cut on both sides of the ridge board. The total slot width is 40 mm. Two gaps of 150 mm are left uncut at both ends of the ridge.

On T and L-shaped roofs, the ventilation slot of the long ridge is made according to the above instructions. The slot of the short ridge ends 300 mm before the long ridge and 150 mm before the eaves.

In the presence of a chimney, the ventilation gap is cut, not reaching it 300 mm. Although the aerator is subsequently mounted to the pipe itself.

The width and allowable length of the vents may vary slightly depending on the design and manufacturer of the ridge aerator. But the principle of their device remains the same.

After that, the cut gap is cleaned of sawing waste. And the aerator is installed in the center of the gap and fixed with galvanized roofing nails through special holes provided for fasteners. The length of the nails should allow fastening to the lower roof lathing.

Usually, the aerator begins to be fixed from one end of the ridge, flush with the edge of the gable cornice. And they finish the fastening - from the other end of the skate. That is, regardless of the fact that the ventilation slot begins at a distance of 15-30 cm from the edges of the ridge, the aerator is mounted along its entire length. This approach increases the decorativeness of the ridge, allows it not to stand out from the general structure of the roof. At the same time, the installation of an aerator only above the ventilation slot works just as well. The only thing is that the aerator on such a roof will be more noticeable.

If necessary, a ventilated ridge is assembled from several aerators, connecting them together. If the installation of the ridge is carried out in the cold season, small gaps of 3 mm must be left between the elements to compensate for thermal expansion.

Then, on top of the ridge aerator, a row of ridge tiles is laid out, the color of which matches or is combined with the color of ordinary tiles. Ridge tile petals are obtained by dividing the shingles of ridge and cornice tiles along the perforation lines.

The resulting petals are folded in half, put on a ridge and nailed - 4 pieces for each tile. Installation is carried out with an overlap. Each subsequent petal is superimposed on the previous one with an overlap of 50% to completely cover the nail heads.

The aerator, covered with flexible tiles, is practically invisible on the roof and looks like a single whole with it.

The process of installing a ridge aerator with its subsequent coating with bituminous tiles is recorded on video:

Buying and installing a finished aerator is not the only way to install a ventilated ridge. With proper skill, it can be made completely independently, without buying any specialized elements. The optimal width of such a ridge is 50 cm, the width of the ventilation gap is 50 mm.

Materials used:

• galvanized plaster mesh;
• bars 50x50 mm (will provide a ventilation gap of 50 mm);
• OSB or moisture resistant plywood;
• plank eaves/end;
• lining carpet, flexible tiles.

For the ridge device, proceed as follows:

1. In the ridge, a ventilation gap is cut in a straight line, 30-50 mm wide, not reaching at least 150 mm to the edge of the ridge.
2. On both sides of the gap (on the slopes), strips of galvanized mesh are fixed, which will later be tucked behind the bars and serve as protection against dust and insects entering the under-roof space. To make the filtration system more reliable, the mesh web is also fixed over the ventilation gap.
3. From above, through the ridge, on both sides of the roof, bars of 50x50 mm are stuffed - they will form ventilation side vents (gaps) and, at the same time, will play the role of a crate for the surface of the ventilation ridge.
4. The mesh strips are thrown over the bars, sheets of OSB or plywood are stuffed on top, 450-500 mm wide.
5. On the sides, sheets of OSB or plywood are covered with an end / cornice strip. After that, the ridge is almost ready, the final touch is the overlapping of a solid surface with petals of a flexible tile.
6. A lining carpet is stuffed onto a continuous crate, and tiles of ridge-cornice tiles are placed on it. Fastening is carried out with the help of roofing nails, in the usual way for flexible tiles.

Many practicing builders believe that making a ventilated ridge with the method described above is a better ventilation option than installing a factory aerator. Often it lasts longer, is less susceptible to mechanical damage and the harmful effects of temperature changes.

After watching a short video story, the device of such a ventilated skate will become clear:

In conclusion, I would like to note that a not always ventilated ridge is able to fully circulate air masses and ventilate the under-roof space. With large slopes, a ventilated skate is not enough. The extraction process will work poorly. In such cases, it is additionally necessary to install pitched point aerators, which can strengthen the hood and, accordingly, improve the quality of ventilation.

Roof-Point Valve (KTV), or as it is also called: a point aerator, is used on roof slopes with a slope of 30 ° or more. For flexible tiles, ridge-point valves with an even salary are used.

On gentle slopes with a slope of less than 30 degrees, the aerator may be ineffective due to the small difference in height between the ridge and the roof eaves. Also, in winter, it can simply be covered with snow, which can lead to the loss of the ventilation process in the under-roof space of the roof and the formation of destructive processes. For sloping roofs on skates, instead of a KVentil, they use (ridge pipes).

Roof aerators on bituminous tiles

All parts of the valve are made of high quality plastic. There are different colors of roofing aerators that can be matched to the color of the roof. The black color of spot aerators is considered standard and compatible with all colors of shingles.

If the roof has a required slope of more than 30 degrees, then point valves will be appropriate in this case.

How to count the number of ridge point valves

One standard KTV-cabinet is designed to serve 50-60 m² of roof (depending on the manufacturer's company). It is calculated according to the area of ​​​​the slope.

As an example, a roof valve from a popular manufacturer VILPE designed to service 50 sq.m. roofs.

By the same principle, the number of point aerators of other sizes and types is calculated. The capacity of one point valve is taken as a basis (for example, 1 valve per 50 sq.m., 60 sq.m.; 25 sq.m., etc.) and the area of ​​​​individual slopes or the entire roof.

Types of point aerators

Ridge Spot Valves for Finished Roofing

Mounted over finished roof.

Consists of a salary, a protective grid and a cap. A rubber gasket is installed on the underside of the salary, which is responsible for sealing with the roof.

They are mounted using hexagonal ones (as for metal tiles).

Standard valves mounted together with a flexible roof

The most reliable point valves. The salary of the valve is covered with flexible tiles.

Consists of a salary, a protective grid and a cover. The design of the point valve is easily disassembled.

One standard valve is designed to serve 60 m² of finished roofing.

There are similar (same type) aerators with a smaller area of ​​the ventilation slot, designed for 50 sq.m. roofs.

For installation, roofing bituminous glue is required, which gives reliability in sealing.

Simple ridge point valve

There are simpler and cheaper Ridge Point Valves.

KVentil from TechnoNikol and Aquasystem is designed to service 25-30 sq.m. roofs:

On such valves, the covers can only be removed from the inside of the salary, so they cannot be disassembled after installation. The lid of this point valve is disposable, with plastic latches. If force is applied to the valve cover, the latches break off, and the cover needs to be replaced.

Video about roof valves:

Ridge deflectors (pipes)

For roofs with small slopes (from 35 ° and less), ridge ventilation pipes (deflectors) are used for under-roof ventilation.

Ridge roofing pipes, located at the top of the roof ridge, increase the height between the ridge and the eaves (at the points of entry / exit of air masses to / from the under-roof ventilation space), thereby increasing the force of natural air draft in the under-roof space.

One ridge deflector is designed to serve 50 m² of finished roof.

The salary of the ridge pipe has a bending rib - a regular place for fixing the pipe in the roof ridge. Thanks to the regular bend, the deflector is easily mounted, taking the outlines of the roof slopes.

Variety of roofing valves for shingles

Depending on the manufacturer, you can find a wide variety of roof valves, which have both external differences and different characteristics for servicing the roof area.