Triangular Windows in a House (42 Exclusive Examples)

Home » Plastic windows » Triangular windows - a stylish solution for a country house

Triangular windows are primarily installed under the roof, in the attic part of the building. And this is not surprising. An attic room in a private house is a huge field for the design fantasies of its owners.

Here you can arrange any room, from the bedroom to the bathroom or mini-workshop. In any case, the space under the roof of the house should be sufficiently illuminated to make being in the room comfortable and cozy.

And since attics most often have a triangular shape, the best solution in this case would be triangular windows.

Purpose of a triangular window on the top floor of a house

The practicality of a triangular window on the top floor of a building is obvious - the rafters have a triangular shape after being connected at the ridge, and to create lighting in the attic of the house, dormers are used, which take on a triangular shape on the corner structure of the roof of the erected building.

However, if earlier such windows were often made blank and made it possible to simply obtain a little technical illumination in the structure, then with the development of attic rooms in cottage construction, triangular windows became a permanent element of the design of such structures.

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Alexey Belogolovtsev

Leading technical specialist at Windows-Life

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In order to competently and efficiently design the cottage construction of a private house, it is advisable to contact specialists and get advice on the construction of such a house, design and connection to the location of the project.

In such a project, triangular window openings can be used, which will add freshness and unusualness to the appearance of a cottage or private house in an urban area. The same triangular windows can also be used for specific landscape design structures of a personal plot.

Installation of the frame on the roof

Dormer windows (if several are planned) do not have to be placed exactly in a row. They can be placed in several rows.

In this case, the lower edge of the windows is located at a height of 90 cm from the floor of the attic. The top edge can be located at a height of 2 meters or higher. The higher the skylight is, the more light and air enters the attic.

By and large, it is a real roof. Only small size. When installing the rafter system in those places where windows are to be installed, openings are left, which are enclosed with rafter legs.

Such rafters are reinforced, since they have to bear the entire load from the window. Then transverse beams are installed on the reinforced rafter legs. The lower beam is at the level of the external wall. The top beam is the size of the window.

Vertical posts are installed on the lower beam, which are connected along the top to a transverse beam. The resulting frame is fastened to the upper beam, which lies on reinforced rafter legs, with longitudinal beams.

This is how a dormer window frame is obtained without its rafter system. The rafter system is made in the same way as the main rafter system of the building. But there are some subtleties.

The frame should be checked horizontally and vertically. If everything is in order, then install the ridge beam and small rafters. To significantly simplify installation, you should make a template for the rafters and then cut them according to the template.

The speed will increase by an order of magnitude. Moisture-resistant materials are used to cover the side walls of the frame. The roof of the window is installed simultaneously with the installation of the roof of the house.

It is very important that high-quality waterproofing of the joints is carried out between the main surface of the roof and the window. Otherwise, leaks in these places cannot be avoided.

To perform waterproofing, specialized materials are used: membranes, pressure strips, special silicone-based sealants.

Advantages of triangular glazing

First, it’s worth looking at the pros and cons of triangular window structures. This will help you understand whether it is worth installing this particular option in your attic, or whether it is better to choose a classic rectangular shape.

Advantages of triangular windows:

original and aesthetic appearance

let in a lot of light

a full-wall model will give the illusion of panoramic glazing

this shape fits perfectly under the roof of the house

You can choose many window decoration options

If previously the windows under the roof were small and hardly illuminated the room, and therefore the attic was used only as an attic, now the situation has changed dramatically. Most often, in house construction projects, large roof windows of unusual shapes are initially installed.

By purchasing custom-made attic windows, you can choose exactly the shape and size that will fit not only into the exterior of the house, but also into its interior design.

Insulation of the gable

Finishing the gable roof with siding begins directly with its insulation. Insulation is necessary to ensure that the temperature on the roof in summer and winter is acceptable.

For this purpose, you can select any material - according to financial capabilities or any other choice:

Advice. Most often, mineral wool or polystyrene foam is used. The easiest way is to use polystyrene foam - it is more suitable in terms of pricing and is convenient to use.

Such insulation can be carried out both from the outside of the pediment and from the inside. Each sheet of foam plastic is straightened with special nails.
It is necessary to put a mesh over the foam and plaster it in order to protect such a rather delicate material from various damages.

Once the plaster has dried thoroughly, you can proceed directly to the sheathing of the gable.

Like any other types of non-standard windows, triangular plastic windows are produced by profile bending. However, there are certain limitations that must be taken into account when designing:

You can order professional glazing of any complexity. We create both standard and unusual window systems based on individual designs. Manufacturing custom windows takes 7 working days, regardless of the complexity of the technology used. Non-standard plastic windows are purchased for country houses, apartments, offices, industrial facilities, buildings with an original facade.

Our designs are based on the best domestic and German profiles. We supplement them with optional double-glazed windows: energy-saving, sun-protective, impact-resistant, sound-proof, multifunctional. We use various glasses: stained glass, triplex, frosted. Plastic frames can be colored, with one-sided or double-sided lamination in any color or with the texture of natural wood. Plastic frames can be given any bend. They order windows of different shapes from us: round, oval, in the form of arches, triangles, trapezoids. Our specialists can install a combined structure from different modules.

Disadvantages of triangular designs

Disadvantages of such designs:

it is important to take into account the load-bearing capacity of the floors of the house, since large solid windows can cause them to collapse

Most often, windows need to be made to order - with measurements of dimensions, roof angle, etc.

triangular windows are more expensive than standard ones

for them you need to use special cornices, window sills, fittings and other elements

the maximum number of chambers in a double-glazed window for such windows is three, since a larger number is problematic for manufacturing

The main problem is the high price of custom designs. Therefore, even at the stage of building a house, it is important to include their cost in the estimate. When repairing and replacing old windows with new ones, simply calculate your available budget in advance.

In general, triangular windows have many more advantages than disadvantages.
If you decide to create a truly cozy place on the top floor, this type of glazing will definitely help in this matter. Related articles:

Wooden triangular windows

Triangular colored windows

Triangular laminated windows

Options for opening triangular window sashes

In order for the attic project to be completed correctly, and the end result not to disappoint you with poor quality, the introduction of a triangular window into it must be thought out to the smallest detail. The dimensions of the room, the features of the roof, the thickness of the wall - each parameter is taken into account when designing the window itself.

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Structural features divide triangular windows into:

Deaf (auditory windows). Such windows are used to give the interior and exterior a more attractive look, as well as to illuminate attic spaces. They are not equipped with an opening system. As a rule, the size of such windows is not too large, and therefore they will not be able to sufficiently illuminate a large living room;
Triangular windows. They are small windows with an opening mechanism. The catch is that the sash can only be opened to a certain angle - up to 39°, which imposes some restrictions on the use of such a window. This is a good option for small spaces in the attic, such as a bathroom or dressing room;
With fully opening sashes - a window option suitable for placement on the entire wall under the roof or only part of it. The design feature of such windows is that they are divided into several blocks (for example, one rectangle with opening sashes and several blind triangles on the sides). This solution allows you to increase the functionality of the triangular window and reduce the load on the load-bearing wall.

Options for opening triangular window sashes:

Window with two blind (non-opening) sashes

System with one blind leaf

Design with vertical blind sash

Single opening sash system (tilt and turn)

Design with two opening doors. On the left there is a swivel and tilt position, on the right there is only a swivel position

A window with a complex triangular shape, with the sash opening in a rotary or tilting position

At the corners of the system the doors are blind, in the center - opening to the side and in a folding position

Of course, the last option looks the most impressive, and it provides maximum room lighting. But when choosing a particular design, it is worth taking into account the load on the wall and ceilings, as well as the level of insulation of the room. A large window on the entire wall will somehow let more cold into the room, and therefore it is worth thinking about three-chamber double-glazed windows and enhanced thermal insulation of the wall located near the window if the room is used as a living room.

Please note that large window structures are always recommended to be divided into several parts to avoid wall collapse. The classic option is a trapezoidal window at the bottom of the wall, and a triangular one at the top.

Installation of window top grooves

At first glance, it seems that the structural solution and method of installing a dormer triangular window is similar to creating a multi-gable roof, but in reality there is a significant difference. So the slopes on a multi-gable roof have a standard slope. As for the triangular-type dormer windows, the roof slopes above them, which have a slope of 64 degrees, are connected to the roof slopes of the entire house, for which this angle is 40 degrees. In this case, the grooves are non-standard: the lower and upper parts are made differently.

In the upper part of the roof for the window (from the attic it looks like the vault of a cathedral), a design with slanted rafters is used - they support the support of the flanges (shortened rafters), located at an angle of 64 degrees. To carry out installation, you need to know the parameters of the valley rafter beam and the angles of contact with the ridge beam and the side wall.

Further work on how to make a dormer window yourself is carried out in the following order:

Using a long level or plumb line, transfer the position of the center to the floor where the groove intersects with the beam of the ridge of the window on the roof.
Using a ruler, draw a line from the resulting point to the corner of the side wall. Next, draw the line of the ridge beam. Both of these segments are nothing more than a projection of the valley and the rafter beams of the ridge beam onto a horizontal plane.
Using a square, measure the resulting angle on the floor. Using the data obtained, the lower end of the valley rafter beam is sawed down, thereby ensuring the accuracy of the connection with the side wall of the opening.
A cord is pulled between the corner of the side wall and the ridge beam and the cut angle of the upper end of the rafter beam is measured using a square. The distance between these points is measured and thus the length of the rafter beam of the valley is determined.
Next, the projection line of the beam is transferred to the upper beam (it is located on the side wall) and the size of its lower supporting cut is measured.
Then the workpiece is marked - it is cut to length and the end edges are cut, observing angles of 18 and 72 degrees - and installed in place.

For each window, it is necessary to make 2 exactly the same mirror-symmetrical beams. The required number of shortened rafter blanks can be made using a universal template made independently.

Types of windows with three corners

Another interesting nuance associated with triangular windows is restrictions on the degree of their corners. The most successful project from an aesthetic point of view includes a roof window, the side edges of which are parallel to the roof slopes. But is it possible to achieve such a result in all cases?

First, let's define what triangles are:

rectangular - one of the angles has a value of 90°. Such windows are located in the wall so that a right angle serves as the base. To create symmetry, two mirrored windows are installed at right angles to each other;
isosceles - two angles have the same size. In this version, the base is the side that connects the same corners. The design looks symmetrical in any case, but it is for it that there are restrictions on the size of the base angles;
equilateral - all angles are equal to 60°. In this case, the window already meets the requirement for the size of the angles.

So, after choosing a window design, you should consider the size of its corners in such a way that this is feasible in the project, and so that the window fits well under the roof slope.

Non-standard forms - difficult solutions

A triangle is a figure consisting of three angles whose sum is 180 degrees. Therefore, at least two of them will be acute . These are not the outlines we are used to seeing when contemplating classic window openings.

This is the essence of all the difficulties associated with ordering, installing and operating triangular windows. I'll start in order:

Problem No. 1: choosing the size of the angles

The window opening is made during the construction of the attic facade even before ordering the double-glazed windows themselves. And, of course, from a visual point of view, it would be ideal for me to follow the contours of the gable roof. But first, I decided to ask if there were any restrictions on the size of the corners of the triangular window being created, and, as it turned out, for good reason.

Minimum angle degree of triangular frame

The corners of a triangular window should be:

in the case of a fixed window - at least 30°;
in the case of an openable one - at least 45°.

If these values are not taken into account, the window may collapse either during installation into the wall or during operation. At the same time, for different profiles and different numbers of chambers in double-glazed windows, these values may deviate, so the exact data must be obtained from the manufacturer.

Expert commentary

Alexey Belogolovtsev

Leading technical specialist at Windows-Life

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The most successful and problem-free option is to think through the design of the window when drawing up the attic construction project.

But if you are installing a window in an already finished room, most likely there will be no problems, since most houses have standard roofs with certain angles, at which specialists will be able to select a safe window model.

Wooden houses with plastic windows

Plastic windows on a wooden house look very original. Especially if they are painted in a suitable color. Another thing is that installing windows in this case requires considerable experience and certain skills. There are very significant nuances, and if you don’t know them, then in a couple of years you may encounter a situation where you will have to replace the windows again. And this will happen because every wooden house tends to dry out. And as a result, the geometry of the entire building and its individual parts changes. In particular, window openings may become skewed and cracks will appear in them, which, of course, will not add joy to you or the comfort of your home.

The main feature of installing plastic windows in a wooden house is that you will first need to make the so-called casing or frame.

Video: Features of installing windows in wooden houses

The importance of casing

The main task when installing plastic windows in a wooden house is to firmly secure the window structure in the opening and maintain the window’s independence from the loads that load-bearing walls can transmit. That is why, when installing windows in log houses, a structure such as casing or frame is used.

What is a pigtail?

This is a structure that will take on any loads of load-bearing walls when the house shrinks. Essentially, this is an additional “box” that will not allow the window opening to deform.

The pigtail is usually made from wooden beams measuring 150x100 millimeters. Using various tools, a tenon is cut out on it, that is, they give it the appearance of the letter “T”. Then this tenon will be inserted into the window opening, on which the corresponding groove is first cut.

There is another option, more complex - the window opening itself is given the shape of a ridge, and then a board with a pre-cut groove is put on it. By the way, this type of socket is more reliable, as it results in a more rigid fixation.

Step-by-step instructions for making a pigtail look like this:

the window opening is cut to the planned length and width using a saw;
With the same saw, grooves of the same width are cut on each side of the opening;
a tenon is cut on the beam; the timber is wrapped in felt and hammered into the groove of the window opening;
At the edges, each of the four bars is additionally fixed with screws;
Now you can install plastic windows on the finished pigtail.

What are triangular profiles made of?

There are only two materials from which modern manufacturers make profiles for triangular windows - wood and plastic.

Tree

The option is considered classic; it fits perfectly into the design of wooden houses in style and has a number of other advantages.

Advantages of wooden windows:

Wood is an environmentally friendly material

These windows are quite durable

If they are deformed or damaged, in many cases it is not necessary to completely replace the profile, but to repair one or another part of the frame

They retain heat well in the room, while creating a comfortable microclimate

Wooden frames have high decorative properties

The only downside to such windows is their high price. High-quality material in combination with multi-chamber double-glazed windows will cost a considerable amount, but will last for many years.

Many people are confused by the flammability of wood, despite the use of various protective impregnations.
But this nuance is difficult to attribute to the specific disadvantages of such windows, since most often they are installed in wooden houses, which means that the issue of fire safety completely depends on the literacy of the project and the consciousness of the owners of the house. Related articles:

Round windows

Triangular windows to the kitchen

Bay windows

Plastic (PVC)

Advantages and disadvantages of plastic profile:

Affordable cost

Plastic windows can be laminated to a specific coating or any color suitable for the interior

Such frames do not require additional processing or special care - just keep them clean

Plastic multi-chamber windows have high tightness

PVC windows are much more popular than wooden ones. But they have several more disadvantages, for example:

Polyvinyl chloride is an artificial material

It may release harmful substances when heated for a long time (for example, under constant sunlight or during a fire)

The service life of such windows is shorter than that of wooden ones.

Scratches and chips on the surface are difficult to repair and mask

One way or another, plastic windows are an excellent option in terms of price and quality.

Vertical blinds

Despite the fact that vertical blinds have existed on the design market for a very long time, they are not becoming less popular.

They are not often used in residential premises, but they are still very relevant for offices and public spaces.

Currently, vertical blind designs can also be used for inclined windows.

When the window is opened, the lower slats move towards the higher ones. The range of fabrics for vertical blinds is wide enough to satisfy any client.

How to improve the functionality of triangular plastic windows?

The selection of the main elements for the manufacture of triangular-shaped products is carried out on a general basis. Window blocks are traditionally made from PVC profiles with different numbers of internal chambers or euro-beams if the structures are wooden.

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To complete them you can use:

double-glazed windows (energy efficient and shockproof);
laminated or body-painted profiles;
Mosquito nets;
supply ventilation valves.

When it comes to blinds for triangular windows, it is best to use pleated blinds, although other shading methods are available. For example, you can install reflective double-glazed windows or a more economical option - sun protection films.

Stage-by-stage construction of a valley (groove) ↑

1. Using a plumb line or a long level, the intersection point of the valley and the ridge beam of the lucarne is first transferred to the floor. 2. Construct a horizontal projection of such frame elements as the ridge and valley rafters. The valley projection is obtained by connecting the resulting point and the corner of the wall in a straight line, the ridge beam, as a horizontal segment in the projection, will be the same segment. 3. Determine the angle formed by the projections and file the end of the valley beam under it in the lower part. This operation will ensure its clear connection to the side wall of the opening. 4. The corner of this wall and the ridge beam are connected with a cord, pulling it tightly. Now you can accurately determine two values: the length of the valley beam and the required cut angle at the lower end. 5. Then the rafter projection line is transferred to the side wall, to its upper beam, which allows you to find out what the length of the supporting rafter should be in the lower section. 6. Having completed the measurements, they begin to mark the workpiece directly at the installation site of the rafter beam: it is cut to length, cuts are made from the transverse edges at calculated angles and laid in place.

Triangular dormer windows

Many dormers rising above the main roof have a triangular shape. These gable structures can be part of residential under-roof spaces, and therefore should allow the maximum possible amount of light to pass through.

However, even when a triangular dormer window leads to the attic, it is recommended to glaze it over the entire area so as not to spoil the appearance of the roof. Depending on the dimensions of the opening and the operating conditions, different models can be used for these purposes.

Installation of dormer windows: technology for installing window structures for the roof

The lucarnes on the roof certainly add beauty to the roof. But still, first of all, they are needed to provide natural lighting and ventilation to the attic space, cold and residential. They amaze with their diversity, not to mention the unique designs that give the structure an individuality and flavor that is unique to them.

The installation of dormer windows begins with the installation of its frame, but first, let’s define what the design of a dormer window is.

The SNIP for the installation of lucarens states that

the area of the dormer windows is equal to 1/300 of the horizontal projection of the roof; ceiling beams, which act as supports for the roof and its frame, are laid immediately above the hatch; in the attic the roof slope is at least 35˚; the number of dormer windows on the roof is calculated based on the mandatory condition that their total width should not be less than half the width of the attic.

The frame is carried out simultaneously with the installation of the rafter system. Depending on the design, it may include sheathing, ridge and rafters. In other words, this is the same roof, only in miniature.

The importance of harmony of windows with the facade of the building

The design of triangular windows is a separate conversation in the construction or reconstruction of a house. Typically, triangular windows are located, as we have already said, in attic rooms. Such rooms, as a rule, are multifunctional and can be used both for bedrooms and for organizing a recreation area, and even for a full-fledged living room. Therefore, the triangular window should not “fall out” from the overall design of the room.

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Curtains covering window openings and their elements must be matched to the style of the window openings. And here three design options can be applied:

façade window highlighting;
facade highlighting of the window using an internal design of a similar shape;
masking the triangular shape inside the room design.

Facade highlighting of a window is used when inside the rooms it is not highlighted separately in the design, but the triangular window is very expressively emphasized against the background of the entire facade of the building. This can be applied especially well when planning a building with a gable roof. Such a window can play the role of the center of gravity of the design, the epicenter of the visual perception of the facade.

In such an emphasis, a special color finishing of the window is used, framing it with additional elements, structuring such a window with several components with complex shapes: trapezoid, oblique triangle, flat isosceles corners of triangular ridge windows. In such a window you can arrange cornices with window shapes and install beautiful lambrequins.

The best examples of window design in a country house, photo

For a compact opening, use short curtain rods as curtain mounts

There are a great many options for designing non-standard windows in houses and cottages. Their appearance depends on the desire of the homeowner, his financial capabilities and ideas about beauty.

French curtain looks great on a triangular window

The best way to choose how to drape non-standard windows is to look at the color photos posted on the websites.

Curtains for triangular windows

Some of the most popular questions related to triangular windows in the attic are how to properly design the space around them, what curtains to choose, what to do with the cornice? The answers to them are much easier to find than it seems.

First, you need to decide on the cornice. There are two design options:

if the attic has its own ceiling, it is quite possible to attach an ordinary horizontal curtain to the wall with a window. The curtains on it, if necessary, will completely cover the window and its geometry, but if desired, you can install grips on the sides of the window to open it in a triangle shape;
if the wall with the window has the same triangular shape, you should choose two curtains located along the upper edges of the window. It will help to hang the curtains at the angle of the roof to further emphasize the shape of the window.

Expert commentary

Alexey Belogolovtsev

Leading technical specialist at Windows-Life

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Please note that inclined cornices must be equipped with special hooks fixed to the rail.

This technique will prevent the curtains from rolling down the cornice to its lower part. The curtains are opened using a cord attached to the back of the structure - in which direction the cord is pulled, in that direction the curtain opens.

Another interesting option for attaching curtains to a triangular window is point hangings. The holders are installed in equal numbers along the upper edges of the window, and curtains are attached to them. It looks minimalistic and original.

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In addition to classic curtains on cornices for a triangular window, you can choose the following options:

Roman blinds are installed on the window in such a way that they cover the upper part of the triangle. When the canvas is rolled up, the upper part of the window remains closed, but in this way you can regulate the degree of illumination in the room;
Blinds – There are models of horizontal blinds specifically for triangular windows. They can be made to order according to the dimensions of your specific window, which provides wide functionality;
Vertical blinds are another good option that looks a little better in appearance than horizontal models. They are hung on beveled curtains and regulate the illumination of the room. In this option, you can choose an unusual pattern or color of fabric for the stripes.

A good option is to combine several types of curtains near a triangular window. For example, if the wall with a window is in a separate niche, you can zone the room with an arch of beveled curtains, organize a soft corner for relaxation near the wall, and hang blinds or canvas on the window itself.

The use of various accessories, for example, elegant hooks in the wall and curtain tiebacks will help not only make the window opening more beautiful, but also increase its functionality.

Roof window frame ↑

Dormer windows are installed on a frame. In areas where the lucarens are located, openings are made between the rafters of the installed system. The framing is made from doubled or tripled rafters, since they experience a significant load that exceeds the impact on any other part of the system.

In the transverse direction, beams are mounted on the rafters in two sections: the first from below at the level of the outer wall, and the last from above - in accordance with the existing design for the rafters, and reinforced ones. Vertical posts are installed on the first one and, tying them along the top with a transverse bar, a frame is obtained. The latter must be attached to the upper beam. This is done using longitudinal bars. In this way, a lucarne frame is obtained, but so far without a rafter system.

The rafter system of the dormer window is arranged in the same way as the structure of the main roof. The frame elements are secured using metal parts.

Next, they begin laying the ridge beams of the window roof and rafters. The latter for the window opening are cut out according to a template and fixed with one end to the ridge and the other to the lower part of the frame structure.

The gables are sheathed with moisture-resistant materials, for example, plywood of this type. In this case, the sheathing should be located at the same level as the sheathing of the outer wall.

What to consider when installing windows in a triangle

The triangular design has three corners. The angles add up to 180 degrees. If divided into equal parts, you will get two acute-angled shapes.

This is where problems with ordering, manufacturing, installation, and operation begin.

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The size of the angles

When installing the roof, you need to take care of organizing the window opening. Better repetition of the roof shape. There are restrictions on the size of the corners.

Rectangular . They follow the contour of the roof and are divided into two equal parts.
Isosceles or equilateral triangle . A structure with equal sides - a plane lying at the base, segments extending from the edges, converging at the vertex of the triangle.

What type to choose for glazing the attic space is up to the owners to decide; an equilateral triangle does not have sashes.

Options:

Blind , without the possibility of opening the valves, angles of at least 30°, otherwise there is a danger of collapse during installation and operation.
The opening system is at least 45°. The angle guarantees uninterrupted operation of the shutters.

The values are not constant, they change depending on the profile.

Construction cost

A triangular product costs more than a rectangular one:

It is necessary to cut glass with an acute angle; the process becomes more complicated. Glass often breaks during cutting.
Cutting glass involves wasting material. The canvas is rectangular, even after economical layout on the canvas it is not possible to reduce consumption.
Products are rare, the order will be individual, the cost increases.
If there are opening doors, the product costs more. Reason: more material will be required, production is more complex.

Sash opening method

According to the opening method they are divided into:

Deaf . It does not have an opening mechanism, there are no doors. Looks good on the attic floor.
Swing . The triangular product is equipped with a vertical mechanism for opening the doors. Possible ventilation. Installation of the mechanism is possible in two design options. It has the shape of a right triangle; in the middle of the structure there is a vertical crossbar for attaching the mechanism for opening the doors.
Transom . Rarely used. The mechanism is installed on the lower part of the base. It is possible to open the sash completely, but it is not advisable. Unlike the vertical mechanism, when opening using the transom method, a large load falls on the open part of the sash.
Turn-and-tilt fanlight . Differs in complexity, opening in vertical, horizontal planes is possible. Expensive, contains parts subject to increased wear.

Interior design

It is impossible to use a horizontal cornice for landscaping a triangular-shaped window structure. Triangular windows are often installed under the roof in the attic; a common type of roof is gable.

Attic decoration:

Curtains . You can make a homemade structure from wooden blocks and install it along the edge of the roof, repeating its outline. We attach Velcro tape to the mounted frame. You need to secure the response tape to the curtain. Fabric curtains appear securely hung.
Vertical blinds . Horizontal ones cannot be mounted. The material is practical.

Valley structure at the top of the hatch ↑

At first glance, the installation of a triangle-shaped lucarne is quite similar to the installation of a multi-gable roof. However, in reality there are significant differences between these technologies. In particular, unlike roof slopes, which usually have the same slope, a triangular opening has a roof with a slope of 60–70⁰. That is, at the junction of the roof slopes of the main roof and the lucarne slopes, non-standard valleys are formed.

The design of the dormer window rafter system involves the installation of diagonal rafters, which serve as support for the shortened rafter legs. To install such a structure, it is necessary to calculate the following parameters:

a valley rafter beam, that is, its length and cross-section, and it must be taken into account that in each of the openings there are supposed to be two beams of this type, which are mirror symmetrical; articulation angles formed between the side walls and the ridge beam.