How to install a roof window in a finished roof. Dormer windows: rules for installation in a roof under construction and in a finished roof. Features of Velux brand windows

Currently, construction has become widespread attic floors. This allows you to effectively use attic spaces, adding to the building usable area. In the attics there are living rooms, bedrooms, offices and even rooms for children, so such rooms need access natural light. Attic occupying large area, often poorly lit by a pediment window. In this case it is necessary to finished roof buildings. According to experts, a roof window, due to its inclined design, provides 30-40% more illumination than a conventional vertical one . Installation is a very important issue. After all, no one wants leaks or cracks in their home that are blown in by cold air. Maintaining tightness is the primary task when constructing window openings in the roof. Best option use the services of specialists. But if the desire to do everything prevails on our own, then try to follow the recommendations and strictly adhere to the technology.

A constructive decision on the installation of translucent structures should be made at the stage of creating a project and constructing a building. If we do not take into account, which, rather, serve for ventilation, roof windows can be divided into:

The material from which translucent structures are made may vary. It can be wood, aluminum, or plastic (PVC). Wooden ones are recommended for offices, living rooms, and bedrooms. And plastic would be better suited for rooms with high humidity - bathrooms and toilets.

There is also a classification based on the shape and design features of roof windows:

Advice! When choosing the design of roof windows, you need to start from design features roof, ease of use and attic size. So the installation height of the window system depends on the slope of the roof and the height of the attic space.

Installation of roof windows in metal tiles has its own characteristics.

Window design

The standard design of a roof window is a set of elements consisting of a frame, one or two sashes, including double-glazed windows and fittings. It is the fittings that ensure the opening and closing of the window, as well as its fixation in in the right position. In addition, the delivery package should include:

apron hydro- and vapor barriers;
gutter for water drainage;
flashing protecting the frame;
thermal insulation;
slopes installed indoors.

Installation Basics

The installation of translucent structures in the attic must be carried out strictly according to the instructions, maintaining quality at every stage. Otherwise, you may end up with leaks and cracks. As a rule, windows are installed in roofs with a slope of at least 15 degrees and no more than 90. Withstanding building codes and taking into account the need to illuminate the attic, the lower edge is mounted at a height of at least 170 cm from the floor. The installation height is affected by the slope of the roof slopes, as well as the size of the window opening.

First important rule– you cannot attach the roof window structure to the roof sheathing. The place of fixation should be exclusively the rafters.
The support for the lower part of the frame should be cross beam, in case of absence, it is possible to rely on the sheathing slats or install an additional beam.
A gap of three centimeters should be maintained on all sides between window frame and roof rafters. This will allow the window frame to be leveled after installation.
The window frame is installed above the tiles, and in cases with high-profile roofing, the recommended distance between the roof and the lower end of the window structure is maintained.
To prevent condensation from forming, icing and fogging of the glass, it is recommended to install a heating device underneath.
If you want to achieve complete tightness, do not use foam; only sealants specially designed for this will help achieve the desired result.

Installation sequence

The delivery package for roof windows must include instructions for installing this product. These guidelines must be strictly followed as translucent structures vary. Differences may be in the mounting brackets, their shape, and location of attachment. For example, the installation of window structures from companies such as Velux, Fakro, Roto has general similarities, but at the same time has fundamental differences in details and elements. Thus, the Fakro company produces window systems with marks on the frame, by which you can determine the recommended installation depth of the structure. Installation of a roof window from the Fakro company https://www.youtube.com/watch?v=bF2g30u8Gu0 Installation of a roof window from the Velux company https://www.youtube.com/watch?v=0ZkylA7ejfc

Advice! Before installation begins, the window sashes must be removed. The technology is described in the installation instructions included with the kit. If a translucent structure is supplied with an installed flashing, it must also be dismantled.

Frame installation

The installation of roof windows begins with the installation of the flashing from the bottom edge of the opening to the top. First of all, the finished corrugated apron is installed in the lower part, followed by the side elements of the flashing and the upper part. The last to be installed are the overlays. window design.

We strictly maintain the gaps between the window frame and the roof covering. This will make it possible to level out all finished design after installation. Recommended clearances:

At the bottom of the window frame:

non-core roofing 1-4 centimeters;
low profile – 10 cm;
high profile – 12 cm;

Side gaps – 4-6 cm.
The upper gap is 7-15 cm.

Next, align the lower edge of the frame horizontally using a level and secure the mounting angles with screws. We do not tighten the screws all the way so that we can align the frame to the dimensions indicated above. We perform waterproofing - the material should be laid so that it overlaps the side of the frame. We start from the bottom and fit the waterproofing to the frame with an overlap. All overlapping joints of the insulator are secured with screws.

We set the salary

Installation of the flashing should also begin from the bottom; it is fixed to the roof with a window trim and self-tapping screws in the holes made. The side elements are fixed in the lower frame and attached to the window frame with nails. The top flashing is secured from the side with screws and secured with clamps to the roof sheathing. On soft or non-profile roofing, the side parts of the flashing are laid using bituminous materials. The profile covering of the roof should be placed on the sides of the flashing, retreating 5-10 cm. The joints of the flashing with the roof must be sealed with sealants or special tape. Installation of the salary https://www.youtube.com/watch?v=HG0XvblS16Y

Warming and insulation

If it does not have an opening function, then after fixing the box, a double-glazed window should be installed. If we are dealing with an opening window, then we hang the sash. Next, you should pay attention to insulation and thorough waterproofing and vapor barrier. We isolate the window with inside, tucking the insulation material along the entire length of the frame. The outside should be covered with foil or similar material to avoid condensation. We also lay the slopes with insulation.

On top insulation material a moisture-proof vapor barrier is laid, this design is attached directly to the window with latches. If the insulating apron does not fit tightly, it should be further reinforced with screws or glue. If the window design includes a water barrier, it is necessary to install a drainage gutter so that the water drains in the right place under the window.

Final stage

Once again we check the tight fit of all elements of the flashing and, if necessary, additionally fasten it to the frame and sheathing. Finally, special elements are attached to the top of the flashing, the roofing material is tightly laid, and the joints are checked. In general, the installation of the window system in the attic is complete, you can hang the sashes, check the opening and closing mechanism (if the window is not blind) and remove the protective film. In conclusion, we remind you of a practical recommendation from specialists - installation internal slopes. The upper horizontal and lower vertical slopes will help improve circulation warm air from heating devices which will protect the glass from fogging.

In this article we will look in detail at how to install a roof window with your own hands. This operation will require compliance with all recommendations and maximum accuracy. Even the slightest mistakes are unacceptable!

The design of roof windows has a number of features. This element is used in special conditions, because it will be affected by precipitation (rain, snow, hail). This requires a complete absence of cracks and seams, as well as high strength. The inclined arrangement puts an impressive load on the frames.

Almost all manufacturers of skylights use appropriate heavy-duty glass. It can easily withstand heavy loads. An ordinary one can simply burst when there is heavy snowfall or hail.

Important! Be sure to ask the manufacturer about the strength level of the glass unit - there must be an inert gas inside it.

This design consists of doors, frames and special fittings. A hydro- and vapor barrier apron is required. This element allows you to avoid leaks. The presence of additional thermal insulation is mandatory for the harsh Russian climate.

The cost of a roof window depends on several factors:

Glass thickness.
Profile materials.
Type of construction (we'll talk about this later).
Brand popularity. For products from recognized manufacturers you will have to pay a little extra.
Availability additional elements(roller blinds, roller shutters, etc.).

All known classifications

By type of materials used

There are three options:

Wooden. Despite the emergence of more advanced and practical materials, wood is still widely popular. Its main advantage is ecological cleanliness and more attractive appearance. The disadvantages include a low service life (due to temperature changes and high humidity, they dry out) and a fire hazard.

Advice: wood should be treated with antiseptics and protective compounds- this will prolong her life several times.

Plastic. The most common option today. The advantages of PVC are known to everyone - practicality, resistance to external factors, accessibility, etc. They are characterized by only one serious drawback - too strong tightness, due to which winter time the ventilation process is complicated (there is no natural ventilation).
Aluminum. They have the best technical characteristics. However, their price is significantly higher. Bye this material has not received wide acceptance, largely due to the high cost of the technology.

By design features

Extensions are the upper elements of the opening that create decorative outlines. They may have a non-standard shape (triangular, semicircular, etc.).
Additional lower elements. They are used in cases where the height of the room is small, and one opening is not enough for normal lighting.
Light tunnel. It does not contact the attic - a reflective tunnel goes from it into the room, and a lampshade is fixed in it, which diffuses the light. It is most often used in small attics.
Balcony elements. An addition that provides access to the balcony. They are often used when the roof has a strong slope.
Cornice elements. They are installed vertically under the main roof window. The need for them arises when the wall is too high.

According to the location of the opening axes

The design of dormer windows varies; the opening method differs. The following varieties are distinguished regarding the location of the axis:

Central. The most popular option, since this design allows the doors to be rotated in all directions.
Elated. They are used in the area of the upper boundaries of the opening.
Combined - the upper axis opens only outward, and the central part can be rotated (for example, to organize cleaning).
Side - these are hatches.
Lower (balcony).

There is another type that cannot be classified into any of the categories - the so-called “smart windows”. This is a system in which the doors are opened using a remote control. Such structures are used, as a rule, in two cases: if the height of the room is too high, or for aesthetic reasons.

Main scope of work

If you want to install it yourself, our instructions for installing roof windows will help you. Let's look at everything step by step.

Theoretical aspect - choosing a location

At the first stage, remember a few simple recommendations:

The ideal option is if the installation does not affect the rafters and they remain unchanged. When planning, you need to strive for this.
The size of the opening must be at least 10% of the area of the room - only in this case will favorable lighting be provided at any time of the year.
The width of the opening should be 5-7 cm less than the pitch between the rafters. If you have them too often, you can make, for example, two small windows next to each other.
It is better to choose the height of the location from the angle of the slope. The steeper the roof, the lower the opening should be located. Recommended height 90-120 cm from the floor.

Rules for organizing the opening

Installation of roof windows begins with preparing the opening. In this case, there are several rules that must be followed:

We subsequently laid insulation between the opening and the frame. Therefore, we leave an allowance of several centimeters along the entire perimeter (depending on the chosen thermal insulation material).
We leave a technological gap between the roof and the bottom line of the frames (within 10 cm).
We leave a gap of 4-8 cm between the roof and the top beam. This is necessary in order to prevent distortion of the structure as a result of wood shrinkage.
Frames must be mounted to the rafters, and not to the sheathing! Horizontal slats are also organized from timber, which is placed on the rafters.

Guided by these rules, you must cut the opening (it is better to use a chainsaw). This procedure is quite simple. However, if you already have roofing material installed and interior finishing done, then this will be much more difficult. You should know internal layout rafters It is ideal if you have a diagram at hand.

Remember that roofing material and rafters are cut with different tools. Wooden elements We cut with a simple saw, and slate or profiled sheets with a grinder with a special attachment. If you do not have the appropriate tools, or you do not know the location of the rafters, it is better to invite a specialist to organize the opening for you. Otherwise, you risk causing serious damage to your roof.

If the attic ceiling is finished with panels or similar material, then they can be dismantled first. This will allow us to know the location of the rafters, and will also make our life easier. We install the panels back only after completion of the work - in this case you will not damage them.

Specifics of box organization

Making a roof window with your own hands is not as difficult as it might seem at first glance. The main thing is to constantly check the accuracy and correctness of the installation. The level (ideally laser), tape measure and plumb line should be yours best friends at all stages of work.

So, you have cut an opening of the appropriate size, following the recommendations presented above. Next, you will need to create a box - an element that will support our structure.

We install a temporary support from below - any block can serve as it. The bottom of the window must be positioned strictly horizontally, so use a building level. Even a misalignment of 1 mm will jeopardize the success of the entire operation.
Secure the bottom of the box with screws. Then we fix the upper corner.

Important! Do not tighten the screws all the way so that you can make adjustments if necessary.

So, we have temporarily fixed the box and now we need to adjust it. Along the entire perimeter, estimate the distance to the roof, as well as horizontality (verticality) using a level or plumb line. The gap should be the same on all sides. For adjustment we use special plastic wedges
Having once again checked the correctness of fixation, we install thermal insulation - we put it in the gap between the frame and the roof, without leaving even the slightest gaps! Remember that a colossal load will be placed on the structure, so even minimal errors and gaps are not acceptable.
The insulating material should cover the window by a few centimeters - this will provide additional protection from wind and moisture. Therefore, we trim it with a margin.

How to insert salary correctly

The frame is the structure that connects the window to the frame. It also creates maximum tightness and strength. It is installed in the following sequence:

First we install the lower part of the flashing. After which the top cover is fixed. These elements are secured with screws.
Then the side sections are mounted on special nails.
Next, insert the side parts all the way down. The sections are mounted to the sheathing using clamps.
The top and side covers are attached with screws.
Now we bring the roofing material to the fold on the flashing.
We attach the upper section of the flashing to the sheathing with clamps. We press it to the box with screws.
If there is excess roofing, trim it, leaving 5-10 mm.

The simplest step is inserting the frame

The most labor-intensive operations are over. Now you need to insert the finished structure. If you are working alone, first pull out the frame so that it does not slam, as this may cause defects. If you have a partner, you don’t have to do this, since he will hold the sash with one hand.

We attach the set to the salary. It should match it perfectly. Otherwise, you need to contact the manufacturer, as this is a defect.
First of all, we fix the bottom part. The lower brackets must be tightened until they stop, and the upper ones must be left slightly loose. As a result, we will create a slight backlash needed for adjustment.
On at this stage final adjustment is carried out. You must fix the window perfectly - the distance from the frame to the opening must be identical on all sides.
After making sure correct location, “tightly” tighten all fasteners.

At the end we finish external slopes on the attic windows. In particular, you need to install a waterproofing apron around the perimeter of the frame (it will prevent leaks). We attach it to a construction stapler. If that doesn’t work, you can use small nails or special screws.

Owners who want to turn the attic above the bathhouse into a functional living space need to take care of the free flow of water fresh air And daylight. These problems can be solved by installing roof windows, the rules of which differ from the standard technology for installing façade analogues. If the owner of the bathhouse decides to equip the slopes with windows rather than the gables, the structure with a light-conducting element should become part of a multi-layer roofing system. The window must not only be reliably strengthened, but also ensure the preservation technical characteristics roof, which guarantees a competent installation.

Tasks of attic window structures

Constructed according to the rules, the complex “pie” of the roof retains heat, does not accumulate condensation on the surface, and serves for a long time thanks to perfectly functioning under-roof ventilation. Equivalent responsibilities are placed on the “fragile shoulders” of skylights, which, moreover, must open freely and not cause difficulty in closing. The windows are on par with roofing system will have to repel atmospheric attacks. Therefore, it is recommended to equip attics with special structures:

With tempered glass or triplex glass;
with an energy-saving light-transmitting element;
with hermetic seals and linings;
with a durable frame, protected from constant exposure to moisture and UV rays;
with devices providing shading, easy operation, ventilation in summer and winter mode, protection from insects and dust particles.

If you want to look at designs for bathhouses with an attic, we recommend that you read the article

It is desirable that using and caring for them should not be difficult, so that fogging and damp finishes do not irritate the owners. All requirements will be satisfied by the precise selection and impeccable installation of roof windows, carried out in strict accordance with the manufacturer’s instructions and generally accepted technological standards.

Preliminary planning and calculations

Installation without calculations is money down the drain. To avoid wasting money, you first need to calculate everything, select windows in accordance with the tasks being solved and the type of roofing material, and determine the location for their installation.

Calculation of glazing area

The formula is extremely simple, the result depends on the floor area. Every 10 m² must be illuminated by 1 m² of glazing, regardless of the window size. There is a nuance that slightly adjusts the amount of light coming through the attic window. The higher the window opening, the more daylight passes through it. However, a too high location will interfere with admiring the surrounding nature and such an installation is more suitable for flat roofs with slope angles of 15-20º.

Unwritten laws and architectural aesthetics force roofs with steep slopes to be equipped with windows, the lower line of which is at an average level of 1.00 to 1.40 m. The lower limit is considered to be 0.80 m, the upper limit is 1.90 m. However, the height of the location is practically does not affect the size of roof windows. In any case, the total area of elements transmitting light should be calculated using the above formula, and the owner will want one, four or two windows - a choice based on personal preferences.

Which window should I buy?

The buyer is now offered a lot of different designs with numerous functions, which are not worth listing in this article. The difference is not only in dimensions, but also in the mechanisms of action, in the location of the rotary axis and the window handle. The last characteristic affects the installation height of the window in the attic. The handle is too high - it’s inconvenient to open if a remote control is not attached to the window; too low - it’s dangerous if children are resting in the sauna attic. In addition to the handle, as a point of application of constant forces, the type of roofing material influences the choice of window. The higher its relief, the greater the height of the outer window frame should be. Products bearing the Fakro brand, for example, have special markings according to which windows are selected for attics with tiles, ondulin, metal profiles or smooth roll coverings.

Typically, the factory equipment includes fasteners, mounting angles, a waterproofing apron with a steam-removing effect, a special sealant and adhesive tape. Of course, it is better to purchase a complete kit with all the accessories necessary for installation. However, in the absence of insulation, waterproofing and a corrugated vapor barrier membrane, all this can be purchased separately or made from those offered construction stores materials.

Important! The installation of a drainage gutter above the top line of the attic window is a mandatory condition. If it is not included in the kit, you can make a gutter from a piece of waterproofing material folded in half.

It is difficult to say what the owner of a bathhouse who wants to install attic windows with his own hands needs to decide initially. Determination of the installation location should be carried out in parallel with the selection optimal design. More precisely, these issues are resolved together.

Choosing a place to install windows

Location is an important factor that determines the service life of the entire roof, interior decoration and aesthetic properties of the building. Before figuring out how to install a roof window, you should find optimal place for his device.

Valuable professional advice. There is no need to arrange window openings:
on the slopes of the valley, since in those formed by it internal corners precipitation will accumulate;
near ventilation outlets and chimneys, the operation of which will cause the formation of condensation;
near junctions with horizontal walls due to accumulation of precipitation and possible shading.

Professionals advise not to get carried away with the close proximity of any components of the roofing system.

The height limits of the opening for the attic window have already been mentioned. There are no clear technical instructions on this matter, so it is impossible to say for sure what has a greater impact on the choice.

Definitely the type of roofing material. Any soft rolled variety can be cut anywhere. Shingles are not allowed! It must be positioned so that the bottom line of the window structure is located above a row of “uncut” whole shingles.

Attention. If it is not possible to create an opening over a row of solid tiles, they will have to be disassembled, and after installation, cut or shaped elements should be laid on top of the window frame.

A significant criterion is the pitch of the rafters. It is advisable not to violate the integrity rafter system. It is recommended to buy windows the size of which allows them to be freely installed between two adjacent rafters with a margin of 7-10 cm. The margin is necessary for laying the thermal insulation layer. If the pitch of the rafter system is insufficient for the device large window, it is better to purchase and install two or three small ones nearby.

Please note. If it is necessary to remove part of the rafters to install a window to increase strength truss structure V window opening install a horizontal beam.

Top or bottom handle. Dormer windows with upper handles they are installed at a height of up to 1.10 m, with lower handles - at a height of up to 1.70 m.

The owner choosing a place for installation must take into account that a heating device must be installed under the glazed structure, because rational heating of roof windows will prevent the formation of condensation. This factor also affects the installation height. And one more thing: the buyer of windows with remote control needs to worry about cable routing.

Stages of installing a window in the attic

The entire process of installing a window in the attic can be divided into a number of technological stages:

preparing the opening for the window to be installed;
installation of a frame with a previously dismantled double-glazed window;
laying insulating material, waterproofing;
attaching a factory gutter above the top line of the window structure or constructing it from a piece of waterproofing;
installation and fastening of flashing parts;
returning the dismantled glass unit to its place in the reverse order;
interior finishing with installation of vapor barrier and construction of slopes.

The manufacturers' instructions describe in detail the installation of skylights: a bathhouse owner who has no experience in this field can carry out the installation with his own hands, strictly following the instructions. Let us only note key points that may be left unattended. But taking them into account is a guarantee of high-quality installation.

Opening rules

Since heat-insulating material is to be laid between the frame and the opening along the entire perimeter, an allowance of 2-3.5 cm should be left on each side of the rectangle, depending on the thickness and density of the insulation.
Between the bottom line of the window structure and roofing material you need to leave a technological gap, the size of which depends on the type of roofing. For an attic with tiles, for example, you need to leave 9 cm.
4-10 cm are left between the top mounting beam and the roofing material. They are necessary so that the window does not “warp” in the event of shrinkage of the wooden rafter structure.
The window frame will be attached to the rafters or to special slats fixed level in a strictly horizontal direction. The slats are made from timber with dimensions equal to the sheathing timber.
On the inside, an outline is drawn along the waterproofing or existing finishing according to the calculated distances.
Waterproofing is not cut along the contour of the window! You need to cut it with a kind of “envelope” so that there are overlaps of 20-25 cm. The overlaps are then turned outward, stapled to the frame or to the sheathing, and the excess is cut off. A waterproofing apron will be placed on top of them so that the insulating shell is completely sealed.

Specifics of window frame installation

Mounting brackets are attached to the frame as specified by the manufacturer. The window manufacturer Fakro recommends dismantling the double-glazed window before fixing the brackets; the manufacturer Velux recommends removing the double-glazed window after attaching the brackets and “attaching” the frame in the opening. Thermal insulation material It is more convenient to lay along the top and bottom lines of the window system and secure with a stapler before installing the frame in the prepared opening.

Advice. Thermal insulation can be laid in the opening before installing the frame and attached to the top and bottom mounting beam.

Frame installation and mandatory adjustments

The lower brackets are fastened firmly, but the screws of the upper brackets are not fully tightened. A slight play is necessary for adjustment.
It is during this period that the horizontal and vertical lines are verified and adjustments are made using plastic corners in case of detection of deviations. Experts advise temporarily putting the sash in place to check how it will fit against the frame. There is no need to be lazy; after fixing the salary, it will no longer be possible to correct shortcomings and serious mistakes.
The distances between the opening and the frame on the left and right should be equal.
After adjustment, all fasteners can be tightened tightly, a waterproofing apron can be laid around the frame, and thermal insulation can be stapled along the side lines of the frame.

To install a drainage gutter in the sheathing above the window, you need to cut two pieces, the size of which equal to height drainage device, and cut a piece of waterproofing to these dimensions. The gutter must be placed under the cut-out section of waterproofing and attached to the sheathing. Please note. The condensate drainage gutter is placed at an angle so that moisture does not linger, but spontaneously flows into the ventilation gap of the roof.

Completion of installation operations

The penultimate touch is that the installation of the salary must strictly comply with the manufacturer’s instructions. General rule: always start with fastening the lower element, and all the parts of the flashing are placed under the elastic seal. Then, in the reverse order of dismantling, they put the frame in place. A vapor barrier material is laid on the inside and the roof window is decorated by installing slopes.

Important. The plane of the lower slope must be installed strictly horizontally, that is, perpendicular to the floor surface. The top slope must be perfectly vertical.

This is not a complete, but rather “expanded” list of nuances according to which the installation of roof windows is carried out. More precisely, the article is a list general recommendations, which must be followed regardless of the specific features of window designs from a particular manufacturer. The strict rule is to comply with the installation technology supplied with the product. It will help the independent installer to eliminate errors, and will allow the service customer to competently control the process.

Installation of roof windows.

When installing the roof, there is an option to installation of roof windows. It must be remembered that the work of installing them will require no less professional approach than the roof itself, or even more.The first step is to measure the pitch of the roof.This parameter is very important, since the installation of roof windows is recommended with a roof slope of at least 10-12 degrees.

The placement of a dormer window in the roof, namely its height in relation to the viewing angle, is selected depending on the functionality and purpose of the room, its required lighting, or simply as a method of ventilation or access to the roof.In addition, technology mansard roof, for the installation of roof windows, requires placing the bottom edge level at least about 1500 mm from the floor.

Installation of roof windows

Depending on the type of roof, the installation of roof windows has its own characteristics and sequence:

1. Preparing the opening for the attic window.

When installing roof windows, the width of the opening is slightly larger than the width of the window itself: from 3 to 7 cm (depending on the manufacturer of the roof windows). The height limitation will depend on the shape of the opening slopes. For a slope with an “expanded” shape, the location of the transverse boards is determined using a level. For better illumination of the room and maximum ventilation (when opening), we recommend planning an “unfolded” slope.

2. Installation of frame (window frame), alignment.

The window frame (frame) is mounted using the brackets included in the kit on roofing sheathing or a solid base on which the roof is laid. For correct installation For a roof window, the window frame must be aligned in a plane. The main thing is to prevent the frame from bevelling in relation to the rectangular frame. To do this, you need to install the rotating part on it and align the window frame with it.

3. Insulation, waterproofing around the window frame.

When installing a window in an opening, it is necessary to correctly “remove the cold bridge” between the roof insulation and the window frame. When installing a roof window, it is optimal to insulate this place with the material included in the installation package. Waterproofing around the window frame is carried out according to the manufacturer’s instructions.

4. Setting the salary.

Performed according to the manufacturer's instructions, differs depending on the roofing covering.

5. Insulation, vapor barrier of slopes

After installing the roof window, it is important to lay insulation on the slopes. In the absence of insulation, condensation may occur on the windows (the window will “cry” and ice will form). When installing the frame under slopes, the vapor barrier must not be damaged. When installing branded slopes, a frame is not required, because the slope is held on the window frame in a special groove.

Installation of roof windows

This technology involves installation in accordance with the parameters given below (certain distances between window blocks and roofing):

So, the indentations from the window to the beam ( rafter leg) - ranges from 6 to 15 cm;
The distances on both sides (on the sides of the frame) are from 3 to 6 cm.
The bottom of the window should not exceed 4 cm in case of a flat roof covering ( flexible tiles or seam roofing), from 8 to 10 cm when installing windows on corrugated material with a normal profile (metal tiles and 20th corrugated sheet), and from 10 to 12 cm for materials with a high profile (corrugated sheet n-35, n-60).

A very popular room. The space, which was a dark, cold attic, thanks to alterations and insulation, becomes a full-fledged room; its lighting can be provided not only by windows on the gable, but also on the roof slopes. Installation of such a lighting source is quite complicated, but, wanting to save money, homeowners with little experience working with construction tools, strive to complete it themselves. The right choice and installing skylights with your own hands in compliance with technological standards will ensure high-quality thermal insulation and the absence of leaks.

Basic installation rules

The dormer window is fastened not to the roof sheathing, but to the rafters.
The distance from the window opening to the rafters should not be less than 3 cm.
It is preferable to place the lower part of the window on a horizontal beam.
The sash of the attic window is put on after installing its frame.
Insulation of the window structure is required.
Correct installation increases illumination by 40%.
The tightness of the window is of great importance, since it bears a high load from precipitation.
The window frame is selected in accordance with the type of roof.

Types of windows

A window in the attic can be placed vertically, with the obligatory installation of a separate roof, or obliquely - in the roof slope. As a material for window frames hardwood, plastic or aluminum can be used.

Rectangular windows for attics are available with a rotating frame; the blind structure is made to individual order.
The design of an inclined and vertical window allows you to open onto the balcony when both are opened.
Composite window: its upper part is movable, and the lower part is blind, it serves to increase the lighting area.

When the roof slopes are very steep and it is impossible to view the surroundings through the attic windows, vertical structures are installed under them.

What does the package include?

The installation of an attic window is more complex than a regular one; its design includes:

Roller shutters or awnings used to provide external shade.
A flashing that protects the window structure from the effects of precipitation.
Frame and glass unit filled with inert gas.
A sealant used for waterproofing.
Internal slopes.
Drainage gutter.

Choosing a location for a window structure

The specific location of the dormer window requires taking into account some nuances: the width of the structure should be less than the span between the rafters; if you want to get more light, then you need to install several windows. The installation height should provide the ability to control the sash using a handle, its average value is 80–130 cm.

Installing a window opening above the radiator will prevent ice from forming.

The angle of inclination of the slopes also affects the placement of windows; on a flat roof they are located higher.

Installation

Before installing a roof window, it is necessary to mark the space for it. It is done from inside the room. 3 cm are retreated from the rafters, the lower limit of the window is outlined, an additional 9 cm is set aside for a roof with a high profile and 6 cm for a flat one. Having marked the upper limit corresponding to the height of the model, we mark another 7 cm upward. The waterproofing sheet is cut with a margin of 20 cm and wrapped inward. If the roofing has already been installed, it must be cut off, and the sheathing must also be removed.

In some cases, installation can be done like this:

A beam oriented horizontally is nailed at the bottom of the opening, and a plank parallel to the sheathing is nailed at the top.

Over top bar A factory drainage gutter is attached to remove sediment; it is installed at a slight angle. If such an element is not included in the kit, its role can be played by a structure made from a strip of waterproofing.

To avoid damaging the glass and fittings during installation, it is recommended to remove the sash. Next, the frame is installed according to the manufacturer's instructions. IN drilled holes The brackets included in the kit are inserted. On top part the frame is fastened with a stapler strip mineral wool for insulation. A strip of insulation is also attached to the mounting beam at the bottom of the structure. The frame is installed in the opening and secured to the corners with self-tapping screws. The top fastener is not fully tightened, leaving room for alignment.

Now the sash is returned to its place and the uniformity of the gap is checked on all sides of the fit. After making sure correct installation shutters, securely fasten the screws in the upper part, and remove the glass again. The remaining parts of the waterproofing are attached under the window seal with brackets, a waterproofing apron is laid out around the window, the top of which is placed under the gutter.

Salary setting

Work on the installation of parts of the flashing begins with the installation of a corrugated apron under the window. After this, the side elements are fixed, which must be inserted into the lower part until they click. The top trim completes the process. All parts are attached to the frame with self-tapping screws and fit tightly together. Next, the roofing material is laid.

The time has come final installation the sashes are in place, the attic window is installed.

Video

Watch the instructional video on installing a Velux roof window: