The better to finish the window slopes inside - options, photo + Video

The better to finish the window slopes inside - options, photo + Video How to trim the slopes on the windows inside the room: description, features, instructions. It is difficult to overestimate the function of the window system slopes during installation. After the windows are installed, the view of the opening is extremely unsightly, and therefore it must be repaired and decorated with something. Slopes should be installed around the entire perimeter of the window so that the damaged section of the wall is hidden (or finish), remove the mounting foam further, fix the material for insulation.

All elements will be covered with slopes, which will also play the role of sound and thermal insulation, and will also give the structure an aesthetic and complete look.

For this reason, we propose to consider how to trim the slopes of plastic windows inside.


The slope is the space between the window frame and the load-bearing wall inside the room. It is so called because it is most often done at an obtuse angle relative to the window frame. Such a turn helps to maximize the penetration of daylight into the room. Finishing rules will depend on what material you choose to create the slope, and also so that it does not differ from any other finishing work using the material.

But there are specific subtleties that you should pay attention to, as well as installation methods that will make it possible to reduce the time spent on work. The methodology will be selected individually, depending on the preferences of the apartment owner and his capabilities.

Earlier, back in ancient times, there was a wooden box as a slope, which was covered with a casing. In modern times, glass packages are used for the manufacture of windows, which help to improve light penetration and increase the width of the slope, since only one window frame will be used instead of a box. It can be made of plastic, wood, or metal.

The homogeneity of the material used in the manufacture of the slope and frame helps to give the structure a holistic look, so most often metal will go to metal, wood to wood, and plastic to plastic.

Note, that on the other side, the room with a window opening can be brick, concrete, iron or wooden. This factor must be taken into account when selecting the material from which the slope will be made, since it can become a continuation of the wall itself, and not the window frame.

The better to finish the window slopes inside - options, photo + Video Modern window systems are made to minimize heat leakage from the room. In order for this function to be successfully performed, the windows are insulated from the walls with a layer of mounting foam, which is afraid of exposure to moisture, ultraviolet rays and mechanical damage.

Internal slopes are needed in order to maintain the integrity of this layer. The amount of work during the installation of slopes will depend (not always, but most often) on the window measurer.During the dismantling of old boxes, hidden defects of the opening often become visible, which previously could not be detected.

Walls can have cavities with air or even be in a terrible state, which can lead to partial destruction. Plaster on old slopes can seem very sturdy, especially if the walls are filled with concrete.

In wooden houses, the presence and condition of the deck becomes difficult. When starting work and ordering a window, a measurer must have excellent work experience and think for the future, even about slopes. The main feature of finishing interior slopes is that it can be done as simply as possible, and this will reduce installation time.

Subject to the necessary technological process of the material selected for work, it is almost impossible to make a slope in less than 3 hours. Installation time is reduced only when several slopes are installed at once at the same time, for example, to the entire apartment or throughout the house.

Basically, they are made in the form of a single-color plane and are not subject to mechanical loads.

Pay attention, that it should be noted that in the overwhelming majority of cases the slopes are hidden from the eyes with the help of curtains or curtains, and you remember them only when washing the windows 1-2 times in year. For this reason, preference should be given to a plain material that can be easily washed.


Before we consider how to finish the window slopes inside the apartment, we should consider all the existing types of finishes. The classification of types implies the material used, as well as the execution technique that depends on it, while the final decorative appearance of the structure will very often not coincide with the materials of execution.

For example, the design of a window opening can be presented in the form of brickwork, natural stone, ceramic tiles, marble surfaces, gypsum stucco moldings or a rough texture from stone chips. Also, slopes can be finished with wallpaper, paints and varnishes, paint. But under any layer of decorative material, the slopes will consist of several materials most often used in modern construction. For this reason, we have compiled a slope classification.


Plaster is a traditional material for finishing a window opening.

In its original version, the method of use to save money and in conditions of a shortage of materials for decoration. The process consists in leveling part of the wall with a primer, applying plaster and then painting the slopes. Thus, the slopes could become a full-fledged continuation of the walls, but at the same time they did not differ in tight adhesion to the window frame. Because of this, after some time, gaps formed, and the thermal insulation was practically zero. Windows needed to be insulated from the outside, and not always by aesthetic methods - cotton wool, moss and even plasticine.

At the moment, the technology for applying plaster has changed a lot, and now this type of slope is considered the best and most stylish option.

Plasterboard slopes

This method is quite economical, and still modern for facing a window opening. Drywall perfectly retains heat, is inexpensive in itself, and its texture will be an excellent basis for applying any kind of decor. Pieces of drywall often remain after modern renovation of the premises has been carried out, and to save money they can be used as materials for slopes. Among the shortcomings, it is worth noting that this type of finish is not resistant to dampness (if you use the usual option), and also has a tendency to deformation at the junction of the wall and window.

Plastic slopes

This type of cladding is the most popular today. The plastic used for the slopes can have different textures and modifications, and can also be used as decoration, or stylized for any other material. Plastic panels are practical and durable, easy to install. With the help of thin sheets, you can hide all the ugly "insides" of the window opening - insulation, foam and missing pieces of the wall.

In addition, plastic can be easily washed with household products that are in any home, and the material is also not afraid of moisture and prevents drafts.

Of the shortcomings, it is worth highlighting that it is expensive, as well as fragile at low temperatures in an unheated room. In the construction market with materials, plastic panels are presented in a variety and different shades. It will not be difficult for you to choose any shade of beige, white, milky to match the frame, as well as any other pattern or color to the wall, wallpaper or accent in home design.

Wooden slopes

What is even better to finish the slopes of plastic windows inside? It is not for nothing that wood is considered an elite type for slopes, and also has a high cost and requires high-quality care. As a rule, wood panels are left in their original natural color, and then they are simply covered with a varnish.

It makes sense to install wooden slopes as an extension of a frame made of wood material, which in themselves will be indicators of respectability, or as an extension of a brightly accentuated log wall. For example, this is a great option if the interior is made in chalet, country or rustic style.

The main advantage of wood is its environmental friendliness, beautiful appearance, which is often called "warm", as well as durability. Among the shortcomings, it is worth noting the high cost, and also the requirement to comply with special rules for caring for wood.

Cork slopes

Cork as a facing material has a number of advantages in the form of a high level of thermal and noise insulation, and it is also presented in various natural shades and very pleasant to the touch.

But the high price of cork panels in terms of not very good strength, simple appearance and difficulty in maintenance is a huge disadvantage. Due to such circumstances, cork slopes are not so popular, therefore, they are extremely rare. But they can be taken on a pencil to develop various style directions indoors.


In addition to what external data of the wall or frame material is, the choice of the facing coating will largely depend on the thickness and condition of the window opening. Sometimes, after the dismantling of old windows has been completed, it is necessary to replace a pre-selected solution using certain materials.

When planning, it is advisable that you consult with a specialist who can analyze the state of the surface, and then advise with arguments the choice of the variety and, in fact, the material for future slopes.

Please note that for installation work, the amount of material used should be calculated, as well as all the required tools should be prepared in advance. It is also worth considering in more detail all the most popular options for finishing slopes.

PVC panels

The sheets of plastic that are used for cladding are called clapboard. On sale they are presented as a standard shape of an elongated rectangle with different widths.

As a rule, these are long panels that can be easily cut and fastened to vertical and horizontal surfaces. Due to the fact that the material is thin, the plastic will not take up much space and will perform decorative and other useful functions, for example, will protect the inner layers of the window opening from the cold.

The best option for installing slopes made of plastic are sandwich panels, which are named for their resemblance to a closed-type sandwich. And it looks like this - between two sheets of lining is placed a layer of thick foam polystyrene, which is the material for insulation, and also makes it possible to simplify the installation of slopes. The number of panels required for installation will be calculated according to the width and height of the slopes, and the thickness of the walls will also be taken into account.

To the footage that you get, you should add from 15 to 20% of the material reserve. If you plan to finish the slopes of the windows indoors on your own, then you should carefully read the theoretical information, and then select the appropriate tool (strictly professional).

Also, in the complete set with panels, you should buy the following materials:

  • The better to finish the window slopes inside - options, photo + Video F-shaped or U-shaped profile, as well as material for the inner corner.
  • Thermal insulation material, if you will be using lining rather than sandwich panels.
  • Timber slats and self-tapping screws of the required length.

  • Colorless or white silicone for sealing joints.
  • Polyurethane foam.

Why is the second option better?

Gypsum board

Gypsum board is a durable and convenient material that is widely used for sheathing pipe boxes, multilevel ceiling and is also ideal for creating window slopes. Among the varieties of material for slopes, it is GKLV (green) should be chosen, since it is this type of drywall that has an increased level of strength and resistance to moisture, and this is of fundamental importance for the opening.

Installation of a plasterboard structure can be done by frame and glue method.

Accordingly, in addition to the main material for finishing, you will also need to buy either drywall glue, or special profiles from which the frame will be made. The profiles should be attached to each other using screws or dowels, and then fix the cut out cladding sheets on them. Before starting work, you should clean out the old layer of cladding, remove the plaster that is crumbling or insulation that has become unusable. Since the adhesive methods require a flat surface, the base should be leveled by applying a conventional putty mortar. it is desirable that the prepared area be treated with an antifungal solution, this is especially important when it comes to a room with a high level of humidity.

Note, that it often happens this way when it is impossible to provide a completely flat surface, which means that the calculations of the material may have errors. In this regard, materials should be prepared with a margin, and then during the installation process, cut off excess parts. slopes made of wood or cork cover are made according to the principle of plasterboard.

Decorative plaster

Decorative plaster has gained incredible popularity due to its aesthetic appearance, resistance to wear and tear and practicality. The material will serve as a finish and can be applied to absolutely any surface.

It will work great on leveled drywall surfaces and can also be applied to concrete, wood or brick. The decorative plaster will contain elements that make it possible to obtain different types of textures on the surfaces to be coated. Plaster can hide small irregularities and defects, enhance thermal insulation and sound insulation qualities.


Correct installation of the slopes will depend on whether the window unit turns out to be airtight and reliable. Slopes help to provide not only the beauty of the appearance, but also additional protection from drafts and moisture.

With certain skills in construction, slopes can be made with your own hands, the main thing is that the technology and installation rules are strictly followed.

For PVC panels, the installation process will look like this:

  • First, clean the surface, remove excess cured polyurethane foam with a construction knife.The cleaned surface must be leveled with a putty, cracks and crevices must be covered.
  • When the surface is ready, set out the wooden battens to serve as a frame for attaching the panels. The profile should be fixed on it, and the space of the slope itself should be insulated with foam, polyurethane foam or mineral wool.

  • Insert sandwich panels or lining into the profile, which will be fixed in several places. The joints should be treated with silicone.

What is the best way to finish the window slopes inside, or rather, by what method? The frame method is much better and more reliable, but you need to correctly set the holding base so that the dimensions on each side of the window are the same.

The process is performed like this:

  1. The better to finish the window slopes inside - options, photo + Video Measure the distance from wall to window, use lines to indicate the installation boundary. The guide profile should be fixed with the outside on the line.

  2. After the frame is ready, it is necessary to insulate the slope inside in the same way as when installing PVC panels.
  3. Cut drywall according to the size of the frame, fasten its parts with self-tapping screws in the prescribed places, and seal the joints themselves with a mixture of non-woven fabric.

Interestingly, that the glue method makes it possible to finish the window block much easier, since the panels cut out of drywall should be fixed to the surface using construction glue or polyurethane foam.

Stages of finishing slopes with plaster differ in their specificity. Before starting work, it is required to seal the window sill, as well as the glass with a protective film, if it was torn off during the installation of the window structure.

Further, the process must be carried out in accordance with all the rules for applying a decorative layer of plaster to any type of surface. For slopes, it is better to choose a mixture that has small granules of the same size. The larger they are, the more difficult it will be to apply the mixture in an even layer. The composition of the mixture with small inclusions is usually more liquid and made on a lime base, so it will be easy to apply.

The first step is to apply an acrylic primer to the prepared surface.

Next, prepare the plaster mixture, on a small area, check the specifics of the texture and shade.

Plaster application is carried out using different methods depending on the desired result:

  • Using a trowel or steel float.
  • Using a sponge or roller.
  • Spray from a broom, brush or brush.

And at the end we have prepared tips for you from the professionals.

Recommendations and useful tips

To get a good result, pay attention to such nuances that can help you with the correct design of the opening:

  1. The better to finish the window slopes inside - options, photo + Video For maximum sunlight penetration, it is better to make a flat corner.To do this, on small windows, the best option would be to create slopes and a frame of a light shade. In addition to the standard white color, you can choose beige, pastel shades, coffee and milk.
  2. For kitchens and baths, it is better to choose materials that can be washed, that is, they are resistant to moisture. PVC panels will come in handy, but there is also acrylic plaster, which does not absorb and does not allow moisture to pass through.

  3. Plaster will play the role of an excellent material for finishing a window opening in the form of a trapezoid, an arch or any unusual shape that is difficult to decorate in other ways. For roof windows, silicone plaster is suitable, since it is not sensitive to ultraviolet rays and the coating will not lose its color, even while on the surface of a hot roof.

If the windows have curtains or curtains that hide the slopes, then there is no point in spending money on expensive finishes. But for windows that are covered with blinds, decorated slopes will serve as a decoration for the window opening.