Features of the design and installation of dormer windows for roofs. Roof dormer windows: considering the device Triangular roof dormer design

Most of those who saw dormer windows in the attic cannot tell exactly for what purposes they are needed, and only a few know whether it is possible to build roofs without using such structures. Civil engineers, experienced roofers and architects can justify why such a structure as a dormer window on the roof is needed, as well as how to correctly draw up a drawing of such windows. For future owners of private housing construction, it is important to know and understand why dormer roof windows are needed, especially if this knowledge is needed if you already have your own house.

Dormer window on the roof and its functionality

A dormer window is a special opening / hole, equipped in the roof of a house building. From the usual ordinary window opening, such a window differs in its smaller size and its functionality. The main purpose of the dormer window on the roof is to perform the following functions:

Roof window example

1. Providing access to natural light in the attic space.
2. Ventilation and air circulation in the under-roof space.
3. Auxiliary access to the roof - directly from the attic.

In addition to the listed functions, such a dormer window serves as a decorative detail of the exterior decoration of the house when it is equipped taking into account individual characteristics and tastes of the owner.

Also, such a dormer window on the roof, the design and drawing, which can be anything, brings the following advantages for individual housing construction:

• no matter how high quality the insulation is floors, heat loss in the attic is inevitable. In other words, heated air masses always tend upward to the roof surface, where they collide with colder roofing - tiles, steel, slates. Condensation forms on the under-roofing planes, and moisture destroys not only wood rafters;
• in a damp and unlit room, the formation and development of fungi and mold is significantly accelerated, and their spores, over time, will penetrate into the indoor premises;
• when there is no sunlight and normal circulation of air masses in the attic, the air becomes stale and even dangerous to human life: it is filled with black mold spores, which cause serious problems for people's health;
• dormer windows are also performed when strong wind function check valve. Such strong wind loads can break the roof or even simply tear it from its place, as the wind, blowing under its surface, forms rarefied flows that raise the edges of the roof. It is the dormer windows that are able to accept such effects of bad weather, and the winds will break them faster than completely tear off the roof from the housing construction;
• in addition, even when the house building is very large, with a massive heavy roof, and the risk that the wind will tear it from its place is minimal, dormer roof windows are still needed.

They act as a valve that prevents the occurrence of vibration that is not beneficial to housing construction.

Varieties of dormer windows

Dormer windows are often also called dormer windows, because they are located in the details of the truss structure that forms the roof of housing construction. Structurally, these window roof openings are typical - an opening / hole in the roofing planes. However, roof builders came up with different types these elements, on which the truss construction of the roof of housing construction directly depends:

• with side walls and arrangement of the roof above the window dormer opening;
• without walls and the formation of a roof on the auditory opening - this design is called a skylight;
• directly in the facade plane and with side walls.

Also, these window dormer openings differ from one another in their geometric shape:

1. In the form of a semicircle / arch.
2. In the form of a trapezoid.
3. In the shape of a triangle.
4. Rectangular shape in combination with a roof in the form of an arch.

According to the type of roof above the opening of the dormer window:

1. With two sloped planes.
2. Hip.
3. With one pitched plane.

Important: the window roof opening can be equipped directly in the roof of the building with going beyond or with glazing of the entire plane of the window roof opening.

Dormer window on the roof construction, drawing, design features

As with the independent design of any other roof structures, the design of windows in the roof of a house requires the implementation of SNiP, other building rules and regulations approved by various state authorities and taking into account all technological features arrangement of some parts of private housing construction. Given these standards, dormer windows will be reliable and durable, and will not reduce the overall performance of the building.

Experts present the following basic requirements for the design of window roof openings of this type:

1. The slope of the roof must be more than 35 degrees.
2. The superstructure above the roof opening must be removed from the external walls of the individual housing construction at a specified distance.
3. The sashes of the window roof opening must also be of a certain size:
   • minimum - 60 × 80 centimeters;
   • maximum - 120 × 80 centimeters.
4. A quadrangular opening with a hip roof should not be a continuation of the wall of the under-roof (attic) space.

Also, these requirements include advice on the choice of building materials for cladding, which are used to equip roof dormer windows. For these purposes, the following are best suited:

1. Copper sheets.
2. Sheet steel.
3. Cherepichins.

It is important to remember that during the drafting of the project, under any conditions, a drawing is made of each planned element of the roof of the building being erected. When it is difficult not to draw such a project on your own, you need to turn to highly qualified specialists for help.

The design of dormer roof windows

The design features of a window roof opening depend on its frame.

The main characteristics of the dormer window frame design:

• the width of the window roof opening must be more than 1/2 the width of the immediate attic space;
• the frame of this element is equipped simultaneously with the supporting structure of the roof, because it also has its own supporting system and crate (with gable-type openings and a ridge knot);
• installation of reliable rafters, the total load of the structure is distributed on them;
• details of the window structure can be cut according to the template, which will greatly facilitate the installation process;
• all components of the structure of the dormer roof window are fixed with steel fasteners;
• the side walls of such an opening in the under-roof space are sewn up with moisture-resistant building materials, and they do the same with joints (this will help prevent leaks).

1. membrane films.
2. Silicone sealants.
3. Clamping bars.

Dormer windows of almost any type can also be made in an already built roof. For these purposes, it is necessary to comply with the following rules for its arrangement:

• the window roof opening is located in the center of the roof slope / attic wall - between the supporting rafters;
• after cutting the opening, load-bearing rafters are installed, and a window frame is mounted on them (fixed tightly with self-tapping screws);
• the final stage is the sealing of the constructed dormer window.

In this case, sealing is carried out with a sealant with an acrylic / silicone base or a waterproof film.

Important: in standard projects for dormer windows on the roof, the design (drawing) almost completely repeats the general shape of the roof, but in a very reduced form.

Design drawing of a dormer window on the roof of a private house - video

Dormer windows on the roof not only provide daylight access to the attic and attic spaces, but also add attractiveness to the appearance of the building. Exist various options their designs and styles. We will talk about the most popular implementation schemes in this article.

Types of dormer windows

The requirements for windows are quite high. The design must have the necessary strength, provide a sufficient level of illumination and ventilation of the room under the roof, organically fit into the architectural appearance of the building, making it recognizable.

Dormer windows have been popular for centuries. The fashion for their appearance has constantly changed, and today dormer and dormer windows can differ significantly in their design features and design.

In addition to window structures mounted directly into the roof plane, windows with vertical glazing are popular:

• without side walls, with a pediment in the plane of the building;
• with side walls and a pediment in the plane of the building;
• with side walls and a pediment outside the plane of the building.

Small triangular, trapezoidal and arched openings with glazing of the entire vertical plane are actively used. Among structures with side walls, dormer windows on the roof differ in the type of their roof.:

• lean-to;
• gable;
• hip;
• arched (with a semicircular or bow arch);
• flat French.

The location and type of windows should be chosen taking into account the style of the building, the placement of ordinary windows. Otherwise, they will be perceived as a foreign element on the roof.

Window design

Design and installation of a dormer window should be carried out in accordance with the requirements of SNiP (SNiP II-26, SNiP 21-01). Regardless of the design features and style of the chosen design, it is necessary to comply with building rules and regulations. This makes it possible to provide the necessary reliability and durability of this structure without weakening the operational parameters of the roof of the building.

The key requirements of SNiP for dormer windows include:

• installation is permissible if the angle of inclination of the roof slope is 35 degrees or more;
• add-ons should be located at a regulated distance from the outer walls of the building;
• sashes that open and are located on the dormer window must have a minimum size of 0.6 × 0.8 m, which means that the allowable size of the roof window will be 1.2 × 0.8 m;
• if it is planned to equip a window with a hip roof and a quadrangular opening, its facade cannot be a continuation of the wall of the building.

GOST provides for the use of various materials for cladding. It could be copper sheet metal, tiles. According to their design features, skylights can differ in the absence or presence of a roof ledge, own roof, gutter. A large opening can have a balcony, which looks especially interesting and attractive. Lucarne windows are distinguished by the presence of side walls and a fully glazed facade.

triangular dormer window

If you plan to make a dormer window with your own hands, most often a triangular-shaped opening with steep roof slopes is mounted. This common design is characterized by the fact that the gable wall of the opening is installed without penetration into the roof - it must be located in the same plane with the corresponding outer wall.

Triangular openings in the roof should be placed in line with windows located lower in the walls of the building, so as not to disturb the architectural proportions of the structure.

The roof slopes of the triangular openings are located at a large angle (60-70 degrees), so there is practically no increase in the usable area of ​​the attic. The advantage of triangular windows is their aesthetic appeal, the ability to perform the original layout of the attic space.

If you intend to install a triangular dormer window with your own hands, you should take into account that its roof adjoins the roof of the building, descending to the place where the groove forms. Thus, during the arrangement, it is not necessary to perform waterproofing of the joints of the side walls and the roof, which greatly simplifies and speeds up the sealing and finishing of the opening and the main roofing of the building.

Structure frame

Before proceeding with the construction of the frame, it is necessary to complete the frame of the roof of the house - erect gables, mount truss system. Between the rafter legs, in the places where windows are installed, it is necessary to provide openings. The rafter system of the dormer window has its own characteristics: the rafter legs framing such openings must be made double or triple, since they will carry an increased load in the future.

According to SNiP, the gables of openings arranged in the roof must be supported by side walls, which are installed perpendicular to the outer wall deep into the building and have a height of 1.5 meters. The frames of the side walls rest on the beams of the ceiling.

The frame of the side walls is mounted after assembling the roof truss system of the building. After that, you should bind the horizontal beams and racks of the gable frames of the openings.

Further work is carried out in several stages:

1. Since the gables of the triangular window are located in the same plane as the walls of the building, the lower ends of the rafter legs adjacent to the walls should be cut flush with the wall sheathing.
2. Jumper beams are mounted between the double rafters of the opening frame. It is recommended to use metal overhead brackets.

It is not allowed to use cuts and tie-ins that weaken the rafter beams.

3. Openings need to be aligned for the verticality of the gable frame, including when installing a ridge beam on it.
4. The rafters for the window opening are cut according to the template and mounted to the ridge and the bottom of the frame.
5. Sheathing of gable frames should be carried out flush with the sheathing outer wall. Usually, construction waterproof plywood is used.

Valley device

The device of the dormer window on the roof, which has a triangular shape, outwardly may be similar to the arrangement of a multi-gable roof. But there is a noticeable difference in mounting technology. The slopes of a multi-gable roof most often have the same slope, while a triangular opening is equipped with a roof with slopes, the angle of inclination of which is 60-70 degrees. Thus, the connection of the roof slopes of the window with the roof slopes of the building is carried out with the formation of non-standard valleys (grooves).

To equip the dormer window, slanting rafters are used, against which (at an angle of 60-70 degrees) the sprigs rest - shortened rafter legs. For the installation of this design, it is required to calculate the length and cross section of the grooved truss beam, the angles of the side walls and the ridge beam. Each triangular rafter opening requires a pair of mirror-symmetrical beams of this type.

Shortened rafters are recommended to be performed using a universal template, this significantly speeds up the work.

The lower part of the skylight

Considering how to make a dormer window, you need to carefully consider the features of mounting its lower part. It must be designed in such a way that inner part soft roof hidden in it through the side walls, and was not visible from the inside. For this, a simplified method of mounting the groove is used.

The gutter beam is installed on top of the roof sheathing of the house. The lower ends of the rafter legs rest against this beam. gable roof window. At the final stage, the structure is sheathed with plywood sheets, on top of which the roofing material is attached. Sheathing with plywood starts from the ridge of the dormer window, the installation of the roofing is carried out in the direction from the bottom up.

If window openings are to be installed on your own, it is recommended to first familiarize yourself with the features of the installation of these structures. It is recommended to entrust the calculation and arrangement of windows of original shapes, the installation of complex roofing connections to professionals.

On the roofs of modern country houses can be found original designs, which outwardly resemble a birdhouse, a variety of shapes allows you to decorate the roof in an unusual and beautiful way. This design is called a dormer window.

Auditory are called window openings located on the roof of houses, in attic rooms. They first appeared at the beginning of the 19th century, already in the second half they were invented attic structures, which are somewhat different from auditory. These are the ones that are currently the most popular.

Attic structures are created in an inclined area, in connection with this, they provide more lighting, despite the fact that they occupy no more space on the roof than auditory ones. The device of dormer-windows is simpler.

Dormer windows of a triangular design are most widespread, their roof slopes are steeper. At the same time, the front wall of this design is located on the same plane with the outer walls, directly above the usual window opening. This allows you to create a harmonious facade, the design does not stand out, forming a single whole with the walls of the house itself.

Scope and functions

Dormer windows are most often created on pitched roofs. Inclined are used to create natural light interior spaces located directly under the roof. They are also called attic.

Initially, these elements were created in order to be able to ventilate the attic space.

Currently, when attic spaces are increasingly being used, their functions have expanded slightly:

1. On pitched roofs they allow you to get on the roof, ventilate the room and organize natural lighting in the attic.
2. In small attics, where the roof is located quite low, they allow you to increase the usable space. Especially when the walls start right from the floor of the attic or attic. At the same time, access to windows is facilitated.
3. Roof with dormers looks attractive and unusual. Their organization allows you to originally plan the room under the roof.

Design

There are 4 options for the design of auditory structures:

1. Antidormer- a structure that is located within the roof slope is built into the roof. Due to which there is a decrease in the useful area of ​​\u200b\u200bthe attic. This option is simple to implement, does not require additional costs for materials and increased waterproofing. However, it is not very popular.
2. Dormer- is located above the roof slope. There are many options for a similar design, it requires additional reinforcement of the roof elements and the creation of high-quality waterproofing. This design method is the most common.
3. In a gable wall. The window is organized in the same plane with the facade, the end wall is used, which has the shape of a triangle. At the same time, the device does not require the creation additional structures which makes it easier to install. Entrance to the attic through this window is free - outside the building, you can climb the ladder.
4. slanted window created in attic rooms, designs and shapes can be different: rectangular, round, triangular. They are located in the plane of the roof itself.
5. Clerestory- the window is completely made of glass, which allows you to create the most effective natural lighting of the internal under-roof space. Most often, such structures are used in industrial buildings.

SNiP

There are certain requirements for the design and installation of dormer windows, which are specified in SNiPs. Norms and rules allow us to ensure maximum reliability of the structure, its durability and safety.

Key points:

1. Installation can be done only if the slope of the roof slope has an angle of at least 35 degrees.
2. Their location must be created at a certain distance relatively outer wall the buildings.
3. Minimum leaf dimensions set within the following limits: 0.6 * 0.8 meters.
4. Facade hip roof , on which the opening is installed, should not be a continuation of the outer wall.

Facing, according to GOST, can be performed with the following materials:

• sheet metal;
• copper;
• tiles;

If the opening is larger established dimensions, the design of the balcony is allowed, which allows you to give the building a special elegance. Luncarna windows have side walls and are, as a rule, designed in a glazed façade.

Types of structures

Currently, building technologies are actively developing. Thanks to this, there are more and more design options for openings.

But the most common types are:

1. Constructions in a gable roof.
2. Inclined(attic).
3. Clerestory.
4. Dormer. Depending on the type of roof, there are subspecies of this type:
   
   • triangular and quadrangular;
   • single-sided and double-sided;
   • trapezoidal;
   • hip;
   • panoramic (from separate segments, created on a trapezoidal roof);
   • flat;
   • arched;
5. Antidormer.

Design

The frame is mounted according to this scheme.

Creating a project for the construction of a roof with dormers is a must. In the design process, it is necessary to take into account some mandatory nuances.

There are certain rules for the placement of structures, non-observance of which, as practice shows, leads to problems during the operation of the roof:

1. They can not be placed near the ridge, eaves, and also close to the gables.
2. If multiple openings are created, then the distance between them must be maintained at least 0.8 meters. This will allow you to freely carry out preventive inspections of the roof, prevents the accumulation of snow on the roof.

The location and shape of these elements is chosen according to the personal preference of the owner of the property, the choice may be fashion trends in the real estate market, as well as the main goal pursued when creating window openings on the roof - they will be used practically or only as decorative elements.

Advice! This architectural element complicates the construction of the roof. The level of complexity will depend on the type of window design chosen, the roofing material. It is better to entrust the construction of a roof with dormers to professional roofers.

An exact drawing of such an element must be reproduced on paper. To do this, all measurements are carefully made. The number and dimensions directly depend on the area of ​​\u200b\u200bthe under-roof space.

The basic rule to consider when calculating is the following:

If you sum up the width of all window openings that are created on the roof, the total amount should be greater than the length of the attic divided in half.

Windows can be in one or two rows. The lower edge can be at least 0.8 meters from the level of the attic floor, and the location of the upper edge depends on the height in the room.

DIY construction technology

The construction of a roof with these elements should be approached with all responsibility:

1. A sketch is created to scale. The width of the opening, equal to the distance between the rafters, will be ideal.
2. If such a roof is placed in a multi-storey building, permission is required.

For installation you will need:

• nails of different sizes;
• triangle and protractor;
• roulette;
• vise;
• hacksaw;
• chisel;
• film;
• timber (more often used material measuring 10 * 5 centimeters);
• window (it is better to buy one that does not require complex maintenance);

To create a standard dormer, you need to go through certain steps.

The work plan is as follows:

1. Plot where work is carried out should be protected.
2. Under working hole bridges are created.
3. Warning signs posted below, indicating that dangerous work is underway.
4. Frame is being built window opening.
5. Installation in progress window.

Hole creation:

1. Two beamers are cut out of the beam that are placed between the beams. They are fixed on both sides with nails.
2. Two more beams are cut off to create reinforcement, they are placed between the extreme beams, for this a vice is used. We also nail them.

Creation of a reinforced structure for corner risers:

1. A piece of timber is cut off for the lower support. Its length should be equal to the width of the hearing aid + 20 centimeters. Attach it from below, parallel to the sub-beam, directly to the floor. He must protrude to the limits of the beamer on both sides in equal parts.
2. Two more pieces (for one and the other side) are cut off a little longer than the distance between the roof and the floor. Marks are made on them at the locations of the reinforcing beams. At these marks, the beam is cut off.

Corner post installed:

1. Measure two beams, the size should slightly exceed the height of the future window. Each of them is nailed in two places - to the reinforcing beam and to the support located below.
2. Upper reinforcement structure is mounted on a reinforcing beam, at the same time, it is pressed close to the rack passing in the corner, then it is nailed to this rack. For strengthening, you need to use a vice. The lower structure is attached in the same way. Work is done on both sides in order.

Corner posts are aligned:

1. The beam is cut off width to the depth of the window, adding 25 centimeters. One end is applied to the bolster, the other - to corner structure. The horizontalness is checked, after which the beam is cut along the bottom of the segment at the point of contact with the rack and reinforcing beam.

The upper bar is installed and the ceiling of the structure is made out:

1. A bar is measured with a length equal to the distance between the ends of the outer corner posts. It is installed on the sections of the racks and fixed with nails. And the ceiling on the side becomes a bar, which was used to align the corner posts.

Creating a window sill:

1. Measure the clearance between the posts, a beam is taken 2 centimeters more than this distance. Grooves for the window sill are cut out in the corner posts, the depth is 1 centimeter. These areas need to be well cleaned.
2. Next, the window sill is inserted into the prepared grooves and fastened with nails. The window sill is fixed with two more segments, which are also nailed.
3. From the side of the roof, transverse ceiling beams are attached. There are only three of them, the length is equal to the distance along the inner edges of the beams on the sides. They are fastened in steps of 40 centimeters to the side ceilings. Then the side racks are nailed at the same interval. It remains only to sheathe the structure.

Roof installation:

1. The number of slats for the roof is calculated as follows: the width of the roof is divided into 30 centimeters. The bars of the obtained length are cut off. Departing from the ends by a centimeter, a line is drawn diagonally on each element. These lines are cut.
2. Tapered planks are installed flat side down, the wide end looks towards the house, and the narrow end is laid on the side ceiling. In turn, all the strips are attached, the distance between them is 2.5 centimeters. On top of this structure, plywood or chipboard is fixed.
3. It remains to nail the covering boards and turn the roof around the window, treat the cracks with a sealant from moisture, fix the drip bar. Then the window is installed.

When arranging an attic or attic, the installation of dormer windows has become popular. And it's not just about the design of the roof, which looks more elegant and transforms the appearance of the house. The functionality of such a structure consists in additional ventilation of the room, its natural lighting and expansion of space.

Whatever the size of the house, no one will refuse extra useful meters. Most roof structures are designed in such a way that the truss system significantly reduces the area, which affects comfort. Dormer windows on the roof make up for these shortcomings. The modernized room is bright and comfortable to use.

Types of designs of dormer windows

In the gable wall, the windows are located on the end side of the roof. They are built-in window frames with the function of ventilation and lighting. Useful area is not increased. Holes are not made in the roofing.

Dormer is frame structure protruding above the roof. By increasing the space, not only the configuration of the roof changes, but also the appearance of the house. For practicality, several windows are installed at once, which can be located on one or both sides of the roof slopes.

Antidormer reminds design features dormer, but the frame deepens into the plane of the roof, which reduces the useful area of ​​​​the attic. This type is used in large areas where hiding space will not create discomfort during operation.

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An inclined window, consisting of only a window frame, is mounted in the plane of the roof. Functionality comes down to lighting and ventilation of the attic.

Often used in the arrangement of the attic are dormer varieties, justified by great functionality:

- ventilation;

- increase in space;

- lighting;

- Improving the general appearance of the building.

The shape of the dormer window can repeat different geometric figures:

- square;

- rectangle;

- triangle;

Arched opening frame configurations are popular and greatly enhance the overall look of the home.

Rules for installing dormer windows in the roof

There are no clearly regulated rules for installing windows in the roofing surface. Basically adhere to the general building technologies and norms. Still, there are some nuances that you should pay attention to.

Installation of dormer windows is allowed only on a roof with a slope of 35 degrees.

The minimum parameters of the wings are 0.6 x 0.8 m.

It is unacceptable to place windows next to the ridge, gables, cornices.

Window structures are built between the rafters. Only sawing of a small part of the load-bearing beams is allowed, followed by redistribution of the load on adjacent rafters. It is forbidden to do a full saw cut, as the rigidity of the roof and the loss of its bearing capacity may be disturbed.

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Dormer windows should not protrude beyond the boundaries of the outer wall of the house.

When installing several windows in a row, an interval of at least 0.8 m must be observed.

When determining the number of windows and their parameters, they take into account the rules of proportionality: the sum of the width of all openings should correspond to half the length of the attic space.

The design of the window system is built according to all the rules of roofing structures. Includes: rafters, lathing, roofing, drainage system.

Stages of installation of a dormer window

Like any construction, the installation of a window structure begins with the development of a project that takes into account important factors:

- the choice of the type of window structure;

— determination of the number of windows and their parameters;

- calculation of the bearing capacity of the roof and the structure as a whole;

- mounting options and materials used.

Drawing up drawings will facilitate subsequent installation.

After completion of design and preparatory work start installation. The frame of the dormer window is assembled first, on which a crate is subsequently made in increments of 50-55 cm. Next, the ridge part is installed and the rafter system is mounted. If the installation is carried out during the construction of the roof, then the finished frame is fixed to the rafters of the main roof structure. When equipping an existing roof with windows, it is first sawn into roofing cake a place for a hearing object without damage to the load-bearing beams. Then the frame is installed and fixed to the rafters.

The roof structure consists of many elements that give it an attractive and finished appearance. Although more than 90% of its area is occupied by the slope surface, auxiliary components that affect functionality and service life are no less important. For example, dormer windows on the roof play not just a decorative role, they serve to ventilate the truss frame, help organize vertical lighting in the attic. Despite this, their device seems complicated at first glance, you can do the installation of windows yourself, guided by the video and our instructions.

Dormer windows are glazed openings located on the roof of a building. They are equipped with gable, hip, tent and. The device of dormer-windows is made during the assembly of the truss frame. Do-it-yourself installation of the cuckoo, as they are called differently, solves the following tasks:

1. Organization of attic ventilation. The main task of dormer windows is to open air access to the under-roof space. Their device allows you to constantly ventilate the truss frame, preventing wood decay.
2. Organization of vertical lighting. The attic device involves the organization of natural light, which comes through the dormer windows.
3. Providing access to the roof. Another function of dormer windows is to provide access to the roof surface in order to do repairs, installation or do-it-yourself maintenance.
4. Completion of the architectural appearance of the roof. The design of the hip, tent and half hip without dormer windows looks unfinished. Installation of these additional elements makes the appearance of the roof richer and more attractive.

Please note that "cuckoos" primarily serve practical purposes, and only then decorate roof structure. Therefore, the size, shape and finish of this architectural structure is chosen to provide maximum light, air and free access to the roof.

Kinds

The classic design of dormer windows is a superstructure protruding above the roof surface, which visually resembles a small house. You can do the installation of this architectural element with your own hands, if you make the right calculation, create a drawing, and then assemble the frame. The installation of dormer windows is allowed at an angle of inclination of the slopes of not more than 35 degrees. The dormer window device may look like this:

• With a pediment in the plane of the structure without side walls.
• With a pediment in the plane of the structure with side walls.
• With a pediment outside the plane of the building and with side walls.

Note! The device of the dormer window must comply with building codes, its dimensions must be at least 10% of the attic area, but not more than 0.5 of the width of the wall on which the installation is carried out.

The form

The design and location of the "cuckoo" is selected in accordance with appearance roofs and architectural style of the building. In addition, the finish of this item must match roofing material used to cover the roof. Installation of dormer windows is carried out in accordance with SNiP II-26, SNiP 21-01. Compliance with these standards guarantees the reliability and durability of the design. The roof dormer window can be triangular or rectangular according to the configuration of the opening. Typically one of the following will be installed:

1. Shed.
2. Gable.
3. Arched.
4. Hip.
5. Flat.

Please note installation hip design a dormer window is much more difficult than a single-slope or dual-slope. Proceed with the installation of an architectural element of high complexity, having in front of you detailed drawing, as well as necessary tools. To learn more about the installation process, you can watch the video instruction.

Frame device

Whatever the shape of the window, hip, gable or arched, the main design rule is that the design of its frame should not violate the roof truss system. "Cuckoo" is mounted as follows:

• First, frontal beams are installed between the rafter legs of the roof frame.
• Vertical racks are installed on the rafters that limit the structure in width.
• A run is laid on top of each row of vertical racks, connecting the supports to each other.
• Rafter legs are installed on the runs, which are connected on a ridge run.
• The frame is sheathed with siding or clapboard, and roofing is laid on the crate.

Important! It is not easy to install a hearing "birdhouse" on the roof without breaking the roof truss frame. To learn more about the process, you can watch the video tutorial or read our instructions.

Video instruction