Inserting skylights into the finished roof. Roof window installation: the most complete installation instructions. Installation procedure

It is believed that the arrangement of a residential attic is more complicated and more expensive than the construction of a conventional non-insulated roof with a cold attic. There are reasons for this:

• It is necessary to qualitatively insulate the attic.
• It is necessary to correctly mount the vapor barrier and the superdiffusion moisture and windproof membrane.
• It is required to install skylights, as required by the manufacturer.

The last point is often problematic. Errors in the installation of windows on the attic floor negate all the advantages of this room. As a result of jambs of illiterate builders, skylights leak in the rain, and condensate drips from the ceiling, damaging the finish. It is not surprising that many developers are distrustful of attics, believing that it is better to build a cottage in the old fashioned way. To avoid the most common mistakes when inserting a roof window into a roofing pie with flexible tiles, our video and photo instructions will help you, which tells you:

• How to calculate the size of a roof window depending on the area of ​​\u200b\u200bthe room.
• How to choose a place in the attic roof for window installation.
• How to prepare a window opening for installing a skylight.
• How to install a roof window box and salary.
• How to install a condensate drain.
• How to make waterproofing at the junction.
• How to install the salary of a roof window and make heat and vapor barrier.

Roof window installation: planning

It is possible to mount a roof window both at the construction stage of the attic, and on a finished insulated roof with an already laid topcoat and layers of vapor barrier and hydro and wind protection. In the first variant, work is carried out sequentially, step by step, and usually does not cause difficulties. In the second case, you need to rack your brains on how to cut a window in accordance with the manufacturer's recommendations, going through the entire attic roof pie with flexible tiles.

The main difficulties of installing a roof window left “for later” will have to be carefully dismantled or cut through, moving from inside to outside:

• inner crate for finishing the attic;
• vapor barrier;
• insulation;
• superdiffusion membrane (moisture and wind protection);
• crate and counter-crate;
• sawing OSB boards under the opening;
• partially remove flexible tiles around the opening under the window.

The width of the roof window is set by the pitch of the rafters. If the builder does not want to install a narrow window, fitting it under rafters mounted at a distance of, for example, 60 cm from each other, then one rafter leg will have to be cut, strengthen the structure, etc. This increases the likelihood of errors by installers, the timing and cost estimates for the work. From here:

The installation of skylights should be planned at the stage of designing a house and calculating the truss system.

For reference, we are guided by the following figures:

• Skylights are recommended to be cut into roofs with a slope angle of 15 degrees or more.
• The window area is selected according to the formula: per 10 sq. m of the attic floor should account for 1 sq. m glazing.
• The upper part of the roof window (from the floor) is located at a height of about 2 m, and the lower part is about 1.2 m.
• The opening under the roof window should be at least 4 cm wider than it, optimally 6 cm.
• The length of the opening is approximately 4.5-5 cm longer than the length of the roof window.

Stages of installation of a roof window

alexnrg FORUMHOUSE Member

I decided to install a roof window in the house myself. Roof pie: rafters - a board with a section of 15x5 cm, a vapor-permeable moisture-windproof membrane, horizontal and vertical lathing, OSB, lining carpet, flexible tiles. Questions arose:

• How to properly install a skylight?
• How to prepare an opening?
• How to fix a window in the attic?
• How to remove condensate?
• What is a salary and how to set it?

Salary (metal frame) is a system of gutters for hermetic connection of a roof window with a roof covering. The flashing removes rainwater and moisture from the roof window when snow melts.

All work on installing windows in the attic is divided into a number of successive steps:

1. Opening preparation.
2. Assembly and installation of a heat-insulating contour.
3. Installation of a roof window frame in a thermal frame.
4. Installation of a shutter (double-glazed window).
5. Adjustment of the side clearance and window rebate.
6. Installing a condensate drain.
7. Installation of a waterproofing apron.
8. Salary setting.
9. Insulation of slopes around the window and restoration of the vapor barrier circuit from the inside of the room.

Let's talk about the key stages of installing a roof window and how to avoid mistakes.

Preparing a window opening for installing a roof window

In the video instruction, the specialist tells how to prepare a window opening for installing a roof window if a roof has been built and roofing has been laid.

When driving vapor and waterproofing, the films are cut in an envelope (crosswise) and wrapped inside the room (vapor barrier) and out (wind protection).

The upper and lower parts of the opening are reinforced with lintels (between the rafters).

And batten bars, so that the edge of the OSB sheet does not hang in the air.

The lower support bar of the crate must be leveled in order to accurately set the roof window box and avoid, noticeable by eye, a height difference on the side slope.

Important! If OSB has not yet been laid on the roof- base for flexible tiles, then from above the opening is framed, made from striped OSB or plywood.

Assembly of thermal insulation and installation of a roof window box

The heat-insulating contour is mounted on a steel frame, which is easily assembled with latches.

The thermal insulation circuit is installed in the prepared opening.

Then disconnect the turnable part of the sash with double-glazed windows from the frame of the roof window.

Mount the mounting plates and install the box in the opening.

Important! Mounting plates(4 things.) are installed at the corners of the roof window, in the places prepared at the factory in the frame, into holes pre-drilled by the manufacturer for self-tapping screws.

With a large length of the roof window (more than 1.4 m), additional intermediate mounting plates (corners) are placed in the place of the pivot mechanism (hinges).

The roof window frame is installed in the finished opening. How to do it correctly, as well as adjust the side gaps and the rebate, is shown in the video.

Secrets of installing a condensate drain

The most important element of the roof window waterproofing system is a metal trough for condensate drainage.

The gutter is installed at a distance of up to 50 cm (optimally 20-30 cm) above the window in the same plane with a hydro- and windproof membrane.

In order for the condensate to flow down the chute, it is installed at an angle ( slope at least 3 degrees). Then the moisture will be removed to one of the sides (ventilation channel formed by the crate).

Difficulties with installing the gutter arise if it needs to be mounted on a finished roof. In this case, you will have to manually cut the openings in the crate, and do it carefully so as not to damage the wind protection film.

The easiest way to install a gutter is if the crate has not yet been installed on the roof, there is no base for flexible tiles and a soft roof has not been laid.

Preparing the site for the installation of the gutter consists of the following steps:

• In the middle of the rafter leg (on both sides of the prepared opening), a vertical cut is made on the film of the superdiffusion membrane.

• A chute is laid on the seat.

I will lower the gutters, using it as a ruler, a horizontal cut of the film is made, so as to combine the vertical cuts.

The result is a windshield valve that slides into the gutter and catches all the condensate.

Steam and waterproofing at the junction of the roof window

At the end of the work, a waterproofing apron is installed, which protects the junction from moisture.

The waterproofing apron is glued to the frame going from bottom to top. Installation is simple - the protective film is removed from the adhesive layer (strip) and the apron material is gently smoothed over the top of the frame. Then the waterproofing apron is fixed around the window with staples.

Important! The upper part of the apron is wound under a gutter that drains condensate, and a valve cut from the windshield is wound onto a waterproofing apron. To prevent moisture from getting into places where they are made vertical cuts in rafters, them waterproofed with butyl sealant.

Installation of skylights in a roof made of metal tiles is a rather important stage of roofing work. Improper installation of window structures and waterproofing can lead not only to the penetration of rainwater into the attic space, but also to the formation of wet spots on the ceilings of the lower floor of the building. Therefore, it is not recommended to engage in the installation of roof windows on your own without certain knowledge and practical skills. It is better to use professional craftsmen!

If you have some experience in roofing and want to install a window structure in the roof with your own hands, the installation instructions below will help you do this job correctly. .

In this article

Necessary building materials and tools

Before starting roofing work, it is necessary to prepare building materials, tools:

• metal tile;
• window construction;
• lumber: wooden beams, boards;
• materials for the implementation of hydro-, thermal insulation of the structure;
• construction level;
• stapler with staples;
• nails, screws;
• hammer, screwdriver;
• hacksaw;
• metal scissors.

Today the metal tile is the most demanded roofing material. This coverage is affordable. Sheets of metal tiles have a small mass; under them it is not necessary to equip a reinforced frame, which is very important when arranging a roof window in the roof.

Worth remembering! For this roofing, reinforced heat and waterproofing is provided, since the metal sheets of the tile are quite thin. This will avoid the formation of condensate, increase the noise insulation properties of the roof.

The place of installation of the window structure for the attic, its parameters

The width of the product is 8–12 cm less than the rafter opening (the distance between two rafter legs). In the event that the rafters are installed with a fairly small step, several windows can be mounted by placing them in adjacent niches.

The installation height of the roof window will depend on the angle of inclination of the roof slope and the technology of opening / closing the window. On very steep roof slopes, it is better to equip windows from below, on gentle surfaces - from above. Window structures must also be installed at a height of 120–130 cm from the edge of the slope, if the fittings are from below, 100–110 cm are fittings from above.

Installation procedure

Installation of skylights in a metal roof must begin after the arrangement of the roofing pie, before finishing the room.

Opening preparation

• Initially, on the waterproofing coating, the contour of the window is outlined with a marker. In this case, it is necessary to take into account the indents from the rafter legs. Further, from the indicated contours, you still need to step back inward on each side by 20 cm. You can make a cutout (the remaining 20 cm of material are bent inside the attic).
• The next step is to cut an opening for a window in the roofing with a grinder.

Mounting bar installation

For the manufacture of timber, they take a similar board from which the rafters are made. The product is fastened under the window opening between the rafters, a gap of 8–10 cm is left between the crate and timber.

Important! The mounting bar is located strictly horizontally.

Frame assembly

The frame is installed without salary, sash. Mineral wool insulation is nailed on top of the frame. The heat-insulating material of the lower part of the frame is attached to the mounting bar. After that, the frame is inserted into the prepared window opening.

Sash installation

Installation / dismantling of the window sash is carried out according to the instructions of the manufacturer of the product.

After installing the sash from the opening on both sides, the structure is insulated, excess materials are removed.

Arrangement of external waterproofing

A drainage gutter is installed on top of the window structure, under which the upper part of the waterproofing apron is inserted (included in the product kit). The edges of the apron are brought into the room, attached to the crate, rafters, mounting beam.

The final stage of installation - under the roof window, the roofing is restored.

Salary setting

The final chord of arranging the window structure for the attic is the installation of a salary. It is fixed in the following sequence: from below, from above, from the sides. After that, install the pads.

Important! To seal the gaps of the roof window structure, you can only use a sealant specially designed for this!

In a private house, the attic is another room. To turn the attic into a full-fledged residential, it is necessary to install windows. It is better to do this immediately at the stage of roof construction.

Installing a roof window in a finished soft roof is more difficult: for installation, you will have to cut out a large section of the coating, lining plywood, roofing cake and even rafters, if they are installed with a small step.

The technology for installing a roof window in a soft roof depends primarily on the design of the windows themselves. Manufacturers have different installation requirements. For example, Velux models can only be attached to rafter legs, while FAKRO and ROTO are often attached to the batten.

Consider the general rules of installation.

Scheme and choice of model for installing a roof window in a soft roof

When choosing a model and determining the required number of windows, they proceed from the calculation of 1 square meter of a translucent structure per ten squares of the attic area. It is recommended to draw up a window layout in advance.

• for steep roofs, the window is set so that its lower cut is located at a height of from one meter to 1.4;

• if the slope is within twenty degrees, you can place the window higher - the illumination will be better;

• the minimum installation height is 80 centimeters, the maximum is ninety meters.

The height is also affected by the design of the block itself. More precisely, the location of the handle:

• if the handle is on top, the window is placed no more than 1.1 m from the floor;
• if in the middle - 1.2-1.4 meters;
• at the lower position of the handle, if there are children in the house, you can not put the window low. Not less than 1.3 meters.

The window is installed between the rafter legs. The width of the model is selected so that about two centimeters remain between the frame and the rafters on both sides. A heater will be located along the perimeter of the frame, the width of the gaps between the box and the rafters depends on its thickness.

Our work

Mounting order

1. If the roof is already ready, you need to cut an opening for the window box in it. The opening is made along the cut of the rafters: the same gap is left between the edge and the box as between the box and the rafters. This is how all materials are cut with the exception of the waterproofing layer: you need to leave an extra 20-25 centimeters of overlapping film.

2. If the ceiling is lined with drywall or clapboard from the inside, it will be difficult to determine the location of the opening. It is recommended to have a rafter layout on hand, otherwise you will have to dismantle some of the panels. Before cutting the entire opening in drywall along the contour, several through holes should be made to relieve stress.

3. Above and below the opening, transverse bars are nailed to the rafter legs. Their installation is mandatory if it was necessary to remove a section of the rafter to install the window. If not, it is still recommended to nail the bars: this way the window will hold on tighter.

4. A drain pipe / gutter is placed on top of the finished opening under a slight slope to drain condensate, and attached to the crate. The length of the gutter is equal to the width of the opening. The slope is necessary so that the water does not stagnate, but spontaneously flows into the roof ventilation gap.

5. Remove the sash from the window. If the window is deaf, take out the double-glazed window.

6. Attach the box to the rafters and cross bars with corner brackets. One shelf is screwed to the wooden element with self-tapping screws, the second - to the window frame. The bottom edge is fastened tightly, on the top the screws are not fully tightened.

7. Adjust the design according to the level. Serious distortions are corrected with plastic corners. It is recommended to put the sash back in place to make sure it fits correctly. After adjustment, the sash is removed again and the fasteners are tightened.

8. Lay waterproofing and insulation around the window. The edges of the waterproofing apron are led on one side under the waterproofing layer of the roof itself, on the other - under the condensate gutter. The edges of the roof waterproofing are fixed to the frame. Fastening - galvanized nails.

9. Close the mounting seams with flashing strips from the window kit. First put the bottom part, then the rest. All strips must be brought under an elastic seal.

10. From the inside, the gaps along the perimeter of the frame are sealed with heat-insulating or sealing material, vapor barrier is laid and the slopes are processed. The bottom slope should be horizontal, the top - vertical.

11. Return the sash to its place.

You can slightly change the installation sequence: first sheathe the opening with heat-insulating material, and then install the frame. Strips of insulation are attached to the rafters and bars with a stapler.

Installing skylights on a soft roof is an energy-intensive business and requires high precision.

Poor installation of an inclined window on the roof will lead to the fact that the attic will be constantly flooded with rain, condensate, rain and snow moisture will begin to accumulate under the roofing. All this will accelerate the wear of the roof and the whole house.

Contact us at STM-Stroy: our roofing experience is more than fifteen years, we will install skylights for you quickly, inexpensively and in full compliance with the technology.

Installing a roof window in a finished roof is the most common type of work if you want to turn the attic floor into a residential one. When designing such a floor, it is far from always that future windows are laid, so we have prepared material on how to install them in an already finished roof.

How to install a window block?

Installation in the finished roof is quite possible, and it is not as difficult as it might seem. An important aspect is the consideration of which roofing material is chosen. Quite often, metal tiles are used, in which case the main task will be to choose a place , where the window block will be above the whole sheet. Cut pieces should be avoided. Otherwise, the installation of a roof window in a finished metal roof is practically the same as installation with any other type of roofing material.

If the materials are profiled, then it is advisable to retreat at least 45 cm from the upper edge of the structure. It is important that the row located above the window is also not assembled from separate parts, a whole product is required. If necessary, it is better to replace the pieces with a single sheet of metal tiles.

Before installing in the finished roof, you need to correctly calculate the distance at which the roof covering will be located from the window unit. The gap on top should be about 6-15 cm, on the side you need to put a gap of at least 4 and no more than 6 cm, from below - no more than 4 cm.

It is worth noting that for a flat roofing, the indentation is much smaller: about 4 cm on each side, but 10 cm recede down from the box. If the profile has a large height, the indentation should be about 12 cm.

truss system

Before installation in the finished roof , it is necessary to carefully study its structure and find the rafters. When installing a window, the supporting structure of the roof must not be affected. The frame is positioned so that it fits between the rafters. Ideally, a window block should enter between them, and a gap of 3-5 cm should remain on the sides. It is worth paying attention to the fact that standard frames are not always suitable due to the fact that the distance of the rafters in different houses can be different, especially if building codes were not followed. In this case, you will have to order the window individually so that it fits in size. If the width is too large and you need a narrow window, you can mount additional support systems.

Before installing, you need to find out how the installation is carried out in the finished roof, the video for the guide can greatly help, make the future task easier. When working, you must strictly follow the instructions. You need to start with measurements, first of all you need to measure the opening for the future window. To do this, measure the distance between the inner parts of the rafters with a tape measure. If the width is suitable, you can start making an opening for the future window. The choice of fasteners and other mounting materials depends on what the frame will be made of.

Regardless of which roof windows you choose, installation in the finished roof must be accompanied by structural insulation, otherwise they will fog up and freeze; You can use any insulation that is not afraid of moisture. The insulation must be in the cavity between the frame and the truss system.

Please note that the frame is first mounted, then inserted. This will not only make the task easier, as it will make the mass of the structure much smaller, but it will also allow you to properly adjust the window, getting rid of distortions.

The second stage of installing skylights in the finished roof includes the arrangement of waterproofing, since without it, moisture will enter the room due to the sloping design of the windows. For roof windows, special insulation is produced, which is put on the frame and fixed to the crate using a construction stapler. In order to prevent moisture from accumulating on the surface, it will be necessary to create a drainage gutter, it should be located above the window, but not higher than 50 cm from it.

Installation of waterproofing

After that, you can begin the installation of the salary, it consists of several elements. Each part must be fixed in series, otherwise it will not work correctly to put the dormer window into the finished roof. To make things easier, manufacturers sell items with instructions, so you can follow the manufacturer's advice.

In addition to waterproofing, you will need a vapor barrier, which should also be around the window frame. To do this, use a special tape. It is needed in order to connect the insulation of the window with the vapor barrier of the building and make it a single whole. If you use a clamping bar, you will need to overlap the insulation. After completion of all installation work, slopes are installed. They should not be neglected, as they provide isolation of the room from the external environment, help make the windows look more decorative, do not allow warm air to go outside, and do not let cold air in from the street.

How to install windows protruding above the roof surface?

How to put skylights in the roof and create a protruding structure at the same time? This question occupies many, since it is believed that such windows look more attractive, through them you can equip access to the roof for its maintenance.

Such windows are especially relevant if the building is higher than one floor and it is quite difficult to get to the roof from the ground. That is why you can equip a protruding window or a large glazed area. It will not only facilitate maintenance of the roof, which may eventually be required, but also provide good lighting inside the attic floor. In this case, the installation of a roof window in the finished roof should begin with the preparation of drawings for the future project. It is convenient to use, for example, a hatch window through which it is easy to get out onto the roof. To create a quality design, the following must be observed:

• Draw a plan for the future structure, do not forget to indicate the dimensions of the roof structure and facade.
• Find out the proportions of the future structure, choose a window block so that it fits between the rafters.
• The place of the window opening must be strengthened with a support beam: this will help to make not only a more durable structure, but also facilitate the installation of the frame.

Making in finished roof , do not forget about the joints: in winter, they can begin to freeze if they are not sufficiently insulated. In warm weather, moisture can get into the roofing cake through them, so the joints must be thoroughly sealed and sealed.

Dormer windows in the finished roof are mounted in such a way that the sash opens to the side of the street, in the direction of water flow. By installing the window in this way, you can protect it as much as possible from leakage, and it will be possible to open the sash in the rain.

For central Russia and more northern regions, it is better to use two or three-chamber glazing of hatches. This will help to avoid freezing of the structure. This type of glazing is also suitable for noisy places, as it not only isolates heat well, but also helps to reduce noise from the street. The installation of skylights on the finished roof must be carried out in accordance with the instructions, and the profile itself and the double-glazed window must be selected suitable for the climatic conditions of the place where the building is located. The angle of inclination of the structure depends mainly on how sloped the roof slopes are.

Installation of which on the finished roof takes place in compliance with all the rules, will last for a long time, will become a convenient operational exit to the roof, in addition, they will provide enough lighting to use the floor as a residential one. A sunroof is much easier to install than a regular window, so you can not be afraid to try, even if you have little experience. Before installation in the finished roof, the dormer window must be correctly marked out, a hole under it must be cut in such a way as not only to spoil the roofing material, but also not to damage the truss system.

The roof window can be installed in the finished roof without any problems. It is important to choose the right place, choose the right frame size, or order one if your truss system is wider or narrower than the standard one. If you follow the instructions, the procedure will not seem complicated, you can install a window yourself that will last for many years.

In recent years, the installation of skylights has become widespread. This is due to the benefits that people receive by deciding to reconstruct the attic space and make it a place of comfortable rest.

A roof window is a structure that is installed directly into the roof. As a result of this, the attic turns from a dark and dusty room into a room filled with light, where you can retire from the hustle and bustle and relax.

Installation of skylights is possible with a roof slope of 12 to 90 degrees. Modern manufacturers in the manufacture of their products took into account such conditions as strong winds, high humidity, the possibility of use, regardless of the complexity of the configuration of the roofing system.

Installing a window requires a lot of responsibility, because compared to ordinary windows, it is exposed to strong atmospheric precipitation, as it is located on the roof of the house. Therefore, the installed structures must be strong, airtight and durable.

Roof window installation price

We strive to make the cost of window installation for our customers as affordable as possible. We care about quality and guarantee that the structure we install will reliably protect you from rain, snow, wind and low temperatures. You can order turnkey work of any complexity from us!

The products of these companies have slight differences. For example, for Fakro, the opening handle is located at the bottom, while for Velux, it is at the top. Choose Fakro when you want to place a window opening at the top, and Velux for a lower location.

On average, the price of the products of these two manufacturers is the same. Delivery is quite fast with no delays.