Installing a PVC window sill with your own hands: subtleties and nuances of installation. How to install a window sill on plastic windows How to install a window sill in an apartment

PVC windows have proven themselves well and are very popular, while their installation is mainly included in the cost of the product, which cannot be said about the window sill slab. Therefore, let's look at how to install it correctly plastic window sill yourself.

In fact, the choice of window sills is quite large. They are made from wood, natural or, as mentioned above, from plastic. So why should you give preference to the latter option? Of course, you can purchase any other, but it is PVC that will have perfect combination pricing policy and quality.

Thus, although wooden ones are considered environmentally friendly and natural, they nevertheless have quite serious disadvantages, which has led to a decrease in their popularity. For example, they are very picky about care, afraid of various chemicals and abrasive materials, and paint coating must be updated at least once every three years. Besides, they are afraid high humidity, fire, and most quality products have very high cost. What about stone window sills, their price is also not affordable for everyone. And the installation is quite complicated, so it’s very difficult to do it on your own.

Deprived of all these features modern type PVC window sills. Let's take a closer look at all their advantages, and, of course, their disadvantages. The first is ease of operation. In principle, to return it to its original appearance, you just need to wash it clean water, but in the case of more serious pollution plastic is not afraid of exposure to chemicals. In addition, the installation of plastic window sills is very simple.

It is also impossible not to note the excellent strength characteristics of these products, their resistance to moisture, temperature changes, and fire. There is no need to worry about the fact that they may turn yellow when exposed to sunlight, this will not happen. Despite the fact that white specimens are mainly in demand, you can order a PVC window sill of absolutely any color. The only inconvenience is that you will need to wait a little until this product arrives in your city. And, by the way, their price is significantly lower than that of analogues made from natural stone or expensive wood, while modern plastic is also considered environmentally friendly.

The disadvantage is the likelihood that after just a few years various small cracks, creases and other defects may appear on the surface; however, with proper use, such problems arise many years later. You can still hear a theory about the dangers of plastic, however, this has not been confirmed by anything.

Before considering installation, it is worth making a choice, and for this you should know the entire range of such products. Products differ in the type of coating. The most common are window sill slabs covered with PVC film. They are characterized by not very good resistance to mechanical damage and thermal effects. In addition, over time they lose their appearance as they absorb dirt, dust and dyes, so they require careful care. But their main advantage is their low price.

The next type of material is laminated paper, which has excellent characteristics. This CPL coating, obtained by pressing paper sheets impregnated with melamine resins, is resistant to various mechanical influences, high temperatures, humidity, chemicals. Its only serious drawback is the impossibility of restoration.

But the option that has EPL coating can rightfully be classified as a premium class. This product not only has excellent strength characteristics (the surface is almost impossible to scratch), but it even has antistatic properties, so dust will have to be wiped off much less frequently than with its analogues. Also the window sill has the most different options designer execution, and it is also very pleasant to the touch. It will be velvety and warm, even if the room is quite cool.

How to install a plastic window sill - let's act

Having understood the types and features, you should pay attention to how to install a plastic window sill yourself.

How to install a plastic window sill - step by step diagram

Step 1: Measurements

So that the work goes easily and quickly, and the PVC plate fits harmoniously on seat, measurements must be taken correctly. First, we measure the depth of the window opening, or rather, its lower part, which our window sill will subsequently decorate. To this value you should add 12–17 cm, since the element itself should protrude by about 10 centimeters, and by about 2 cm it will go under window frame. We add 10 cm to the total length, so that in the future it will go under the side slopes of 50 mm on each side.

Step 2: Surface Preparation

This stage is practically no different from others. preparatory work, so we take a brush and a vacuum cleaner in our hands and clean the surface from various debris, dirt, etc. Then we treat it with a primer and let it dry thoroughly. However, there are some individual points, for example, you should check how tightly the window itself is inserted. If there are gaps between the frame and the window opening, they should be eliminated immediately, otherwise heat loss in winter cannot be avoided.

Step 4: Direct installation

It's time to figure out how to attach a plastic window sill, and what we need for this. Basically, nothing special: wooden wedges or special pads that can be found in any hardware store, low-expansion foam and a construction gun. First, we do a fitting to adjust the height of the wedges. The fact is that you need a slight slope (no more than one centimeter) from the frame, then condensation and moisture will not flow into the junction of the window and the window sill, which could lead to the formation of fungus. We also check the level so that the slab does not have differences in length.

Then, having installed the window sill and finally checked all the slopes, we blow out the space between it and the surface of the opening with foam. Why should it have a low expansion coefficient? Yes, everything is very simple, otherwise she will simply lift the product. Next, we place a weight on the surface, a weight of 15 kg will be quite enough, and wait until everything dries. Now you can admire the result, because the installation of the plastic window sill with your own hands is completed.

Usually window sills are fixed in place by professionals, the same team that installs them, but this work You can also make it yourself. This task is quite within the capabilities of the owner of the house, who has a grinder, a jigsaw, and a few simple construction tools and knows how to use polyurethane foam.

How to install a plastic window sill?

Determine the length of the future window sill. This size is made up of several quantities. It is necessary to sum up the width of the window opening and the size of the allowances on both sides, which usually range from 10 cm to 30 cm, depending on the customer’s wishes.

Using a corner, we draw a line on the slopes to determine which part of the wall to remove.

We make a notch with a grinder, cutting a corner, if there is one, and then remove excess brick and concrete with a chisel or hammer drill.

We clean the surface of debris with a brush, removing all dirt, concrete fragments and dust.

There are several ways to properly install a plastic window sill at home with your own hands. Much depends on the material used, because it can be glue, mortar or polyurethane foam. In our case, we took foam for this work, so work surface need to be well moistened. It is best to treat the installation site of the window sill with impregnation.

To level the plane, we will have to use substrates made of plastic, plasterboard, wood or other material and a level. You can mount the window sill not strictly horizontally, but with a slight slope of up to 1 cm from the window, so that condensation or spilled water flows out.

We place the window sill into the groove with one edge, shift it to the right and gradually put it in place.

The product stands completely in the groove of the window frame.

Next, we align the edges so that the releases on both sides are the same.

In the question of how to install a plastic window sill in an apartment with high quality, we have reached the last stage. We install the balloon in the gun, shake it, and carefully blow foam into all the voids and grooves under our beautiful window sill.

We place a weight on the windowsill so that it does not move upward.

We cut off the foam protruding beyond the edges with a knife, and then the wall can be puttied and decorated with wallpaper.

You see that installing a plastic window sill in your apartment or private house with your own hands is not difficult; our instructions will help you understand how to do it quickly and correctly. Good luck to you!

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Modern construction trends involve the use of the most ergonomic materials. The requirements of the average buyer are as follows: the material must be light, durable and inexpensive. Previously, wood was used almost everywhere, but now it is considered a premium material. It was replaced by plastic - it is more durable, cheaper and has almost unlimited decorating properties.
Most often, plastic is used in metal-plastic windows, which are now installed almost everywhere. In addition to them, it is necessary to install a window sill and slopes. Each element plays an important role in everyday life, and their selection and installation must be approached with particular care.

Installation technology

Most often it turns out that the main technical purpose these products are completely forgotten. They are usually used as flower stands, especially large and durable options can be designed as a continuation and expansion of the workspace or in the office, you can even place a comfortable sofa there for reading books.

In addition to all this, the window sills with their protrusion delay the rising from the radiators warm air at a low level, which allows you to warm up the living space much better.

Immediately after installation, you need to let it sit for a couple of days, after which the installation of the window sill begins. You need to prepare the tools:

sharp construction knife;
hacksaw for metal;
sandpaper;
hammer and chisel (if available - impact drill or hammer drill);
wooden or plastic pads for leveling the surface;
building level.

According to the established rule, the window sill must extend into the side walls by at least 3 cm. Using a tool, it is necessary to make special recesses at the level where the surface will be located.
If a new one is being installed, the window sill can be ordered from the same manufacturer. If they are installed separately after a long period of time or it was decided to replace old version for a new one, then you will have to look for it in specialized stores or make to order. To measure the product, it is best to invite a specialist - he will precisely set the parameters of the product and will be responsible for this.

It is important to ensure that after installation metal-plastic window the putty, mounting solution and foam are completely dry. After this, you can begin preparing the working surface - it should be clean, free of foreign protrusions, dust and construction debris, and as smooth as possible. All hard protrusions are carefully knocked down with a chisel or drill, dust is removed with a broom or construction vacuum cleaner, the polyurethane foam is removed with a sharp knife.
Even if the finished window sill was made exactly according to given parameters, situations may arise when in some place it does not become as it should. To solve this problem, sandpaper and a hacksaw are useful - in the right places, the finished blade is adjusted to the place to be installed. If it is possible to start fitting the window sill from the side of the wall, it is better to start there, using a hammer and chisel or a strong screwdriver. As a result, the window sill should confidently fit into its intended place, not hang out in the grooves of the side walls, but also not rub in too much.

You need to spray the prepared work surface with plain water using a broom or mechanical sprayer - the foam will stick much easier to the moisture, which will make working with it much easier. This stage is very important, because It is the polyurethane foam that is the main fixing material.
There are three holes for installation in place - two side grooves and a recess in the window itself. The last hole should accept the window sill as clearly as possible - the unsuccessful gap will be visible during the operation of the living space.
The most important part of installation is setting the surface according to the level. To measure indicators, a mounting level is used. To adjust the angles of inclination, plastic or wooden plates are placed under it. The slope should be set slightly towards the room so that moisture does not linger in the groove between horizontal surface and there was no mold or dampness in the window either.

After correct level exposed, you need to press down the new surface with something heavy; bricks wrapped in rags are ideal. They will hold the window sill when the polyurethane foam swells.
All empty space underneath is carefully and carefully filled with polyurethane foam. The structures are allowed to stand for at least a day.
After the foam has dried, its remains are cut off with a knife - and the window sill is ready for use.

Slopes

An ideal complement to the window sill would be slopes made of a similar material.
This option has a number of undeniable advantages:

relatively cheap materials;
easy installation, which does not require the help of specialists;
reliability and wear resistance;
ease of care.

The procedure for installing slopes

The slopes consist of the following elements - sandwich panel, F-profile, wooden planks and self-tapping screws. All the irregularities of the unprepared wall are hidden under the panel.
Wooden strips are placed on the edges of the slopes to cover the entire height and width of the window opening. An F-profile is screwed on top of them with self-tapping screws, which has special grooves for installation plastic panel.
The profile and plastic panel are refined using metal scissors. The main task is to prevent unsightly gaps.
Directly under the panel on the wall you can put mineral wool or fill the space with foam plastic - this will eliminate drafts and significantly insulate the walls.

Conclusion

Plastic windows are perfectly equipped with ergonomic window sills and slopes made of similar material. Their installation does not require the involvement of specialists; they will last for decades. Maintenance is very simple and immediately covers all installation costs.

Detailed video instructions can be viewed on the video.

How to take the dimensions of a window sill and how to cut a PVC window sill? Competent, step by step installation window sill. Read in this article.

The classic installation of a PVC window sill is the installation of a window sill, which includes the basic operations performed in most cases. Of course, there are always exceptions, which we will also talk about, for example VIP installation!

Window sills for plastic windows

On plastic windows, PVC window sills are most often installed. Wooden window sills are installed less frequently. And very rarely, stone window sills are installed. The latter have their own installation specifics. We will not talk about them in this article.

How to install a wooden window sill on plastic windows? The technology for installing plastic and wooden window sills is not fundamentally different. Therefore, further, we will only talk about methods for installing PVC window sills.

For those who first decided to install a window sill with their own hands, it is important to know that the quality of the window sill plastic affects the installation process. If you intend to work with an economy class window sill (for example, from the ECO company), then you need to treat it with care. For example, when cutting such a window sill with a jigsaw, large chips may appear.

Where can you buy a PVC window sill in St. Petersburg at an affordable price? — Below, for comparison, I give approximate window sill prices for plastic windows, having dimensions 250 x 2000 mm:

Inexpensive and not high quality - “Eco” - 350 rubles.
Inexpensive, but high quality - “Stained glass” - 450 rubles.
Expensive and high quality - “Stained glass VPL” - 1250 rubles.
Very expensive and very high quality - “Danke”, “Moeller”, 2200 rubles each.

PVC window sill markings

Following the technology for installing a turnkey plastic window, the plastic window sill should be installed after the plastic window has already been installed. In the previous article, I already said that the ebb and window sill are installed simultaneously.

In order to understand how to install a window sill on plastic windows, you need to understand that the most important operation in this process is marking the PVC window sill. Next, step-by-step verified instructions with photos, and my video is at the end of the article.

First, take a sheet of paper and a pencil. We draw a window in a section along the width, in a simple way, in the form of an elongated rectangle. Top view. And enter the value of the window width into our rectangle.

Secondly, we find the starting point of the marking. This is done as follows. We measure the length of the window sill. We write the value above the rectangle. We get two numerical values in a column that need to be subtracted. Like at school, in first grade))).

We divide the resulting difference in half. And we get the main number, which determines the starting point for marking the PVC window sill. This figure is equal to the distance from the edge of the window sill to the edge of the frame on each side.

Thus, after installing the window sill and slopes, we will have the same:

The side projections of the window sill are the “ears” and
Dawn angles of slopes

Thirdly, continuing the marking, we take two bench squares (90 degrees) with a scale of 30 cm and 50 cm. Next, we place the first large square with one side against the window sill profile, and with the other side, perpendicular, we press it against the wall, leaving a small gap. The main thing is to understand that the position of the square is the future position of the cut-off window sill. All that remains is to take the first measurement along the length of the window sill, and write down this size on our sheet of paper, on which the starting point of measurement has already been determined.

Fourthly, using a second square, pressing it against the inner wall of the room, we fix the second size along the width of the window sill. After which, the last cutting line of the side protrusion is automatically obtained.

Dimensions are taken similarly on the right side of the window sill.

After which the markings are applied to the window sill itself.

This markup that we looked at is the simplest. It is made in a flat perpendicular opening.

It happens that the opening has the configuration of a step, then it is necessary to take several measurements. But the principle of marking does not change.

Fifthly, if the opening has an angle, then the marking of the PVC window sill is carried out at an angle. To do this, just as in the first case, we press one side of the large square against the window sill profile, and direct the other perpendicular side at an angle. Let's imagine that this will be the corner cutting line. And we place the second square against the inner wall of the room. The point where the squares intersect is the end point. Let's fix its value. Next, leaving the second small square in a stationary position, we again attach the large square to the window sill profile at 90 degrees. We fix the second value at the intersection of the squares.

Thus, the PVC window sill is marked. It should also be said that the cutting line of the side protrusion can be flush with internal wall premises, and is buried in this wall. This depends on whether the customer will make repairs after installing the window.

How to cut a PVC window sill?

After marking, the PVC window sill must be cut off. For this you can use four tools:

1. Hacksaw for metal. Yes, the cheapest instrument, but it requires good physical training.

2. Electric jigsaw. The most acceptable option. You can use an inexpensive one. For example, I have recently been using the company Interskol. Such a jigsaw costs from 1700 to 2500 rubles.

The main thing when working with a jigsaw is to set the pendulum stroke to the number “0” and use a metal file with a fine tooth.

3. Grinder (“UShM” - corner grinding machine). Most effective tool. Allows you to cut PVC window sills most accurately. But, at the same time, the grinder is very noisy and creates a lot of dust.

4. Cordless saw “Makita HS300DWE” and “Bosch GKS 10.8 V-LI”. Lightweight, convenient, cordless tool, but very expensive. The cost of such a saw is about 10,000 rubles.

By the way, we don’t throw away the trimmings from the window sill. They will be useful to us during installation. Read about it below.

We made the markings. The window sill was cut off. Now we will learn how to install it. Before that, we need to prepare some materials:

Well, and some tools:

Construction knife
Hammer
Bench angle 90 degrees (also used for marking, see above)
Level 40 and 60 cm
Gun for polyurethane foam with a cylinder
Sprayer with water
Cargo in the form of improvised means

The most important thing in installing a window sill- these are its supporting points, or rather their number. The classic installation is carried out by most window installers, and consists of minimizing these supporting elements. In this case, the window sill will look quite durable. You can stand on it and you can walk on it. In this case, a slight deflection is possible. As they say, price equals quality.

The gap between the window sill and its base does not matter in the classical method. There are many tricks and subtleties that allow you to achieve a certain strength of the window sill when large gap, for example, from 5 to 15 cm. It is clear that the client who paid for classic window installation is enough low price, has no idea that he is literate and correct installation has a completely different cost. And having recognized her, he would have begun to doubt and run to another company, where he would have been offered the original price, having gone over his ears. And the end result would most likely be the same.

This revelation is necessary so that a client who wants truly super quality must understand that he will have to pay a lot of money for this quality. But this is not enough. Also, you need to thoroughly study the process for which he pays. For example, the process we are talking about in this article is how to install a window sill on plastic windows? Otherwise, he will simply be cheated. So there are two options:

Classic PVC window sill installation
VIP installation of PVC window sill

I consider myself not to have the right to condemn the first installation method, since it has the right to life, if only because we live in Russia. And in our country there is such a thing as Russian reality. But even this installation method must be competent and verified.

Classic PVC window sill installation

So we already have installed window and a PVC window sill cut to size. As I said above, we need to create support points in two or three rows parallel to the window. The first row runs directly along the window. The second row runs along the edge of the inner wall. The third row is the middle one and is necessary if the window sill width is more than 400 mm.

In the classical method, the optimal number of support points in each row is calculated as follows:

Single-leaf window (width 1000 - 1200 mm) - two supports
Double-leaf window (width 1400 - 1600 mm) - three supports
Three-leaf window (width 1700 - 2700) - four or five supports, depending on the width of the window

Further, the support in a classic PVC window sill installation is usually wooden. And these wooden linings, the installers saw from old, dismantled, wooden windows, which is not so scary. After all, the tree is dry.

First, we set up the first row. To do this, take the largest trim from the window sill. With its help, we select the height of the support so that the window sill is pressed tightly against the window frame.

Also, instead of wooden pads, you can use brackets to press the window sill to the window frame, costing 8 rubles apiece. A little expensive, but the installation speed is increased and simplified. The number of staples is the same as the number of supports. The disadvantage is that the bracket only serves as a temporary support for the window sill. Under the weight of a person, the bracket bends slightly, unlike wooden linings. To avoid this, after foaming the window sill (foaming occurs at the very end), you need to wait for the foam to dry completely, about one hour, before standing on the windowsill.

When the first support row is set, you can proceed to the second - outermost row. It is also installed using the same trim from the window sill, and using a level or square. I prefer a square, and set the window sill at 90 degrees relative to the window frame at each reference point. After all, I know that my In this case, the subsequent installation of the slope is facilitated. There is practically no gap between the slope and the window sill. And the slope does not need to be cut at an angle (extra work). And the horizontal level of the window sill does not need to be checked. It will be the same as the window level.

Here, let's make a small digression. A question arises. How to properly install a window sill on plastic windows? Strictly at a horizontal level or at an angle of 2 - 3 degrees (with a slight inclination into the room)? Why is it so strongly recommended to do this tilt? No matter what site you go to, everywhere an inclination angle of 2-3 degrees is required and that’s it.

So, the slope is needed to drain water inside the room, which appears on the windowsill from slanting rain, from condensation during incorrect installation windows, from overwatering flowers, from glass washing.

Now, imagine where the water will go when horizontal installation window sill. Firstly, The amount of water on the windowsill is minimal under any circumstances. I personally have not heard of floods on windowsills. Secondly, The seam between the window sill and the window frame is always sealed. Thirdly, in order for the water to quickly leave the window sill, a much greater slope is needed, and with a slight slope, water will still accumulate on the window sill.

Yes, installing a window sill with a reverse angle is unacceptable, as this actually creates the possibility of water accumulation. But, again, don’t forget about the sealant. In short, the window sill must be level.

I believe that when, while watering a pot of flowers that stands on the windowsill, and water accidentally spills, it should spill on your windowsill evenly in different directions, and not pour onto the floor. Also, I believe that, for example, a writing pen should not roll off the windowsill, as well as any round object. Especially considering the fact that some wide window sills used as tables.

Well, in general this is my opinion about the slope of the window sill. Let's move on. If a third - middle row is required, it is done very simply. In the middle of the window sill trim, linings are selected according to height.

Since, in my example, a double-hung window, I use three supports in each row. Accordingly, we display them in the same way.

After all the supports have been selected, you can take our pre-cut window sill (see above) and insert it under the window frame for fitting. At the same time, once again check the perpendicularity of the installation with a square. Next, remove the window sill, wet the first row along the frame and all support points with a sprayer. And we begin the foaming stage.

We apply a strip of foam along the first row of support points along the window frame, so that half of the window sill profile is covered with foam.

If there is a middle support row, then you need to foam it not completely, but only the support points. The second, outermost row is foamed at the end. Next, we insert the window sill so that the right and left starting points of the markings coincide with the edges of the window frame.

We measure the width of the protrusions. If necessary, we adjust these values by slightly extending or deepening the window sill on each side. We make a control measurement with a square or level in the plane of inclination. After that, all that remains is to foam the second support row completely. Advice: if this gap is more than 5 cm, you need to foam in two layers. Apply the first layer 2.3 cm. Wait for it to dry (20 - 30 minutes). Then, foam the second layer to the end. Also, do not forget to foam the gaps where the window sill is cut, and do not forget to put a weight weighing from 1 kg to 10 kg, depending on the width of the gap. Since I have a gap of about 2 cm, a load like the one in the picture (tray with tool) is enough.

And here is what should happen after installing the slopes. Despite the fact that when marking, the protrusions, the so-called ears, were different, now, as can be seen in the photo, these protrusions are the same. At the same time, the angles of dawn of the slopes are also the same.

This is the classic installation of a window sill, which is done by professionals. But anyone can do such an installation with their own hands.

VIP installation of PVC window sill

Most main principle The VIP of installing a PVC window sill is that the size of the gap between the base of the platform and the window sill should be 10 - 20 mm. Accordingly, if in a classic installation, this distance is not filled with anything. That is, voids remain, because the installers have neither time nor money, which the client does not want to part with. That VIP installation involves filling this space with cement mortar.

One more digression or advice. Very often this filling method is used for large-scale repairs. But builders and finishers, understanding little about the window business, pour the screed under the window sill tightly to the frame or to the window sill profile. And sometimes the foam is picked out right under the window sill profile. So, you can’t do that. The screed should not reach the window block by about 5 cm. There should be foam there.

Further, why don’t window installers make such a screed? That's right, you have to wait for it to dry. And for the money they work for, it is not profitable to wait. In addition, you need to buy the solution. Some craftsmen install the window sill directly on the screed. It's faster that way.

But, if we talk about the highest level of installation - VIP, then, as I said above, you need to fill the screed with a gap of 10 - 20 mm, wait until it stands up. Then, foam the area evenly with a snake. The foam layer is about 30 mm. Carefully place the window sill on this layer without moving it. Align with a level or square and press down with a light weight. The supports for this installation method are, of course, plastic. And they are displayed only in the second outer row. In all other places the window sill will have sufficient rigidity. This is achieved due to a small gap, which is filled with mounting foam in the form of a snake.

After the foam has completely dried, its remains under the window sill are cut off and the seam under the window sill is sealed. This operation is done both on a VIP installation and on a classic PVC window sill installation.

Pay attention! Installing a plastic threshold on a balcony has its own technology. The classic threshold setting is not suitable. Read about it

I hope that the reader of my blog will understand not only the principle of DIY installation, but also the principle of the approach from a professional point of view. Payment for the services of a PVC window installer must correspond to the work done!!! And of course, my video.

Before installing a window sill to plastic windows, you need to determine the material you will use. Most best choice- This is an acrylic window sill. Unlike conventional polyvinyl chloride coating, acrylic film is protected from cigarette burns, sand abrasions and other mechanical influences. At the end there is a complete list of types of window sills; let’s focus on the plastic window sill.

It is more difficult to install a window sill with your own hands, but it is also cheaper, and you will gain experience. After the installers complete the work of installing the windows, you can immediately begin attaching the window sills. Tools you will need to complete the job: construction foam, wooden blocks, either plastic inserts, a level, or an angle, an angle grinder, a hammer drill or a hammer.

The first stage is knocking out protrusions in the slope for attaching the window sill. IN PVC windows There are grooves at the bottom where the window sill should fit, but no one foresaw such a slot in the walls. If you have big house, then by shortening the distance of the protrusions you can save an entire window sill.

When you decide on the size of the protrusion (a few cm is enough), outline the place where you plan to make them with a pencil. Next, depending on the material, walk the grinder along the lines drawn on the slopes. If the material is not very strong, then a hammer is enough to knock off the protrusions later, if you have concrete walls, then you will need a hammer drill with a set of chisels.

Why does it blow after installing the window sill?

Do-it-yourself installation does not always go well - everyone has different skills and experience. Remember that before installing the window sill in the opening, you need to make sure that the installers did not leave you a surprise - holes between the window and the wall, small holes, etc. If you quickly install the window sill without checking this nuance, you will never guess why It’s cold in your apartment, so be careful.

When you have blown out the holes, start cleaning the grooves and the place where the window sill will be installed. Any small pebble can become a major obstacle during installation. After you remove the “large” obstacles, start cleaning the rest of the area - sweep the future location of the window sill with a brush.

Before using foam, it is important not only to clean the area, but also to moisten it - construction foam works in places where there is moisture. We recommend that you use primer for these purposes, just keep in mind that the thickness of the applied layer directly depends on the number of pores in the material. For example, more soil can be applied to aerated concrete than to ordinary concrete- otherwise the place for the window sill will be too wet.

You will need the wooden blocks or plastic inserts that we talked about at the beginning to level the level of the window sill. It should be placed exactly 90 degrees relative to the window. Determine the level of the window sill, and then insert your blanks into the voids between the wall and the object being installed. You can determine the degree either using a level or with your own hands using a corner.

When you're done with your measurements, start blowing with foam. It is very important that the foam is spread around the entire perimeter. Please note that after some time it will increase in size and will need to be cut off. This will need to be done taking into account the fact that putty and plaster will need to be applied under the window sill.

To prevent the window sill from rising due to the increasing foam, it is necessary to place a weight on it. Great solution There will be installation of 5-liter water bottles on the windowsill. Three pieces is enough.

Once installation is complete, seal the joints with sealant.

Price of materials

There is no point in buying expensive foam; it will do for 250 rubles. If you raise the window sill, you can do without a foam gun, but with it the process will be simplified. Its cost is about 1000 rubles. The primer, in theory, should be available in the room where the renovation is being done, but just in case: its cost is 100 rubles. The price of a window sill is from 50 to 1200 rubles per meter, depending on the manufacturer and the quality of the material.