PVC window sill installation technology. How to install a window sill on plastic windows. Organization of outdoor work

Window installation companies often don't get the job done. And the customer is left with a bare window opening that needs finishing. But it also happens that in order to save money, a person himself undertakes the installation of a window sill. Then the question arises - how to install a window sill so that it holds firmly and does not freeze. It also depends on the correct installation whether there will be condensation on the windows, and therefore mold. Please read the following manual carefully before starting work!

PVC panels for window sills occupy a leading position in terms of sales. And for good reason! After all, their technical characteristics provide a large number of advantages during installation.

The panel has stiffeners

TOP 5 advantages of a plastic window sill

Do-it-yourself installation of a plastic window sill has the following advantages:

Panel size can be customized. If acrylic or stone models have a strictly specified size, then PVC window sills can be easily cut. For this, a jigsaw or a saw for plastic is suitable.
The material is characterized by vapor and moisture resistance (absolute impermeability). It will not be saturated with moisture from possible condensation or raindrops, like a wooden counterpart. An additional advantage is that the design is not sensitive to ventilation disturbances, which are often found in modern apartments.
Ease of installation. Do-it-yourself window sill installation is quite a feasible task for a beginner.
Thermal insulating properties. Due to the special structure, the panel additionally prevents heat loss.
The absence of pores, in which dirt and harmful microorganisms usually accumulate.

Video: How to install a window sill with your own hands

How to choose quality material

Before you buy and install a PVC window sill, carefully study its certificate. What you should pay attention to:

for PVC content (it should be at least 50%, better - 60%);
on the percentage of chalk content (permissible no more than 5%);
the thickness of the stiffeners must be at least 1.2 cm and not more than 3.5 cm;
the thickness of the panel itself is from 2 cm.

PVC panel "under the tree"

The most durable panels are produced by Germany. The second place is shared by Russia.

True in size - choose the optimal parameters

Do-it-yourself installation of a plastic window sill should begin with careful measurement. How to choose the optimal parameters? Based on the following conditions:

Depth. On average, this figure ranges from 20 to 50 cm. There is only one pattern here: the narrower the panel, the more reliable and stronger it is. And, the greater the weight is able to withstand when pressed.
Width. To paraphrase a classic, even a window sill has ears. This is the name of the protrusions on the sides of the window. They are necessary, firstly, to fix the slopes. Secondly, to compensate for the thermal expansion inherent in plastic. And thirdly, for a more finished and aesthetic appearance of the window.

Measurements should be taken from the concrete base.

Advice! When measuring the depth, add 15 mm to go under the frame and 50 mm to reach. These are the optimal dimensions of the window sill.

Window sill dimensions

Correct location:

install at least 10 cm from the radiator (battery);
the panel overhang should not overlap the heating source by more than ⅔;
the window sill should not be at an angle of 90 ° to the window - an inclination into the room of at least 1 ° is required.

Installation process - step by step guide

The correct sequence of work and compliance with technical nuances is a guarantee of the quality of the window sill. The process of attaching to a plastic window is not complicated and does not take much time.

Sequence of work - how to avoid mistakes

At what stage of the repair is the installation of a plastic window sill most appropriate? The correct answer is immediately after the installation of windows, before finishing the internal slopes.

If you install it later, the slopes will have to be partially or completely redone. After all, for installation you will need to choose the grooves in the slopes. It is not recommended to remove the protective film from the plastic board until all repairs are completed.

Advice! When installing the window sill, the protective coating must not be completely removed. But only in those places where the panel enters the grooves (near the frame and on the sides). If this is not done immediately, the film will be difficult to remove completely.

Groove for mounting in slopes

Preparatory stage - creating a strong support

How to install a window sill on plastic windows:

If the window is installed by hand, form a mounting seam of foam under the frame. A seam of more than 8 cm should be foamed in several passes with an interval of 7 minutes. And after hardening (after 20 minutes) - install a vapor barrier tape on top. If the installation of the window is carried out by masters, they must complete this stage.
How to install a window sill if the window is already up? Select the grooves on the sides of the window opening (from 10 to 60 mm, depending on the size of the "ears"). If this requires a grinder, it is better to close the double-glazed windows with cardboard sheets for the duration of the work. Since flying sparks can damage windows (melt plastic).
Screw 51 mm self-tapping screws into the support profile under the frame. They should be located at a distance of 17-19 mm from its lower edge. This technique will increase the maximum pressure that the structure can withstand.
If the window sill distance exceeds 40 mm, it should be increased with plaster. Indeed, with this size, the foam will not completely polymerize. Which will lead to a decrease in its supporting and thermal insulation characteristics.
Next, you need to thoroughly clean the window sill with a construction vacuum cleaner or brush. And also - primed the rough surface. The point here is in the features of the mounting foam. To adhere to the surface, the latter must be wet. Also, the primer further increases adhesion.
Measure the surface and, if necessary, adjust the plastic board to size. Do not place the end butt against the wall. You need to leave 1 cm for thermal expansion.
Lay anchor points in increments of 50–60 cm. To do this, fold the plastic wedges with a “jack” and rewind with electrical tape or masking tape. For reliability, you can grab the anchor points with self-tapping screws, since during installation it is necessary to ensure that they do not move.

Advice! If during priming part of the liquid gets on the glass, you need to wipe it off immediately. Since, when solidified, the composition forms a film that is difficult to remove.

Stand profile - 16

We fix the window sill - the secrets of competent installation

How to put a window sill to a plastic window:

Check the window sill for voids in the mounting foam. If gaps are found in the wall, foam them to prevent windows from freezing.
With an effort to install the window sill in profile. Align it in the center so that it has a 2-3 mm slope from the level into the room for every 20 cm of depth. This is necessary to drain moisture.
Foam the space under the window. From above, place a load (for example, 5-liter bottles) around the entire perimeter. The foam tends to expand, squeezing out the board. To prevent this from happening, a load is needed.
Install end caps.
Apply a layer of sealant to all cracks.
After the foam has completely hardened (about 12 hours), remove the load.

How to prevent foam squeezing

Pro tips - how to get the perfect result

How to install window sills on plastic windows - the secrets of craftsmanship:

If the window sill covers the battery, it is necessary to cut a hole in it across the entire width. And then - drown it with a grate.
To overcome the fogging of windows, you need to use the principle of directional airflow. To do this, round holes should be cut in the plastic (in the center of each double-glazed window). This can be done using a special crown. Then install round gratings in the places of cuts. Thus, airflow is normalized and condensation will not collect on the windows.
If you need a deep window sill (for example, for a sofa on the window), you will need to install additional support. In this case, it is better not to use brackets, since the plastic is brittle in bending. The best option is to imitate a fireplace portal by laying out the walls on the sides of the radiator.
The window sill must withstand a load of at least 30 kg per 1 sq. m. But fastening the window sill to a plastic window must withstand point loads of up to 100 kg. After all, wiping the window, the owners rely on the plastic with all their weight. To do this, you need to lay reference points under the board. These can be pieces of wood treated with an antiseptic, plastic wedges, etc.

Attention! The back of the window sill is the most vulnerable. It is she who has all the load during window cleaning. Therefore, tight clamping is necessary to increase the strength of the structure.

Directional glass blowing

Window sill on the loggia - Spanish installation method

The classic way to install a plastic window sill on a loggia is based on the following rule. The window sill should be mounted last. As a result, to do this qualitatively, a lot of measurements and adjustments are required. This results in a huge waste of time and effort.

The Spanish method allows you to reduce installation time by 4 times! And the strength of the structure to make 2 times higher. What is its essence? The fact that the window sill should be installed at the very beginning. And already from it to fasten the guides. This significantly reduces the number of measurements.

The installation process step by step looks like this.

Screw 51 mm self-tapping screws into the plastic frame at a distance of 3 mm from the lower edge of the special support profile.

Screwing in clamping screws

Install a window sill between the screws and the frame. How to attach a window sill to a plastic window? Fix it to the frame with 71 mm self-tapping screws at an angle in several places. The depth of the self-tapping screws is 1–2 mm. This is necessary to prevent the structure from falling out.

Fixing the window sill to the frame

Attach the upper guide from a 40 mm wide beam to the bottom of the plastic board. Fix it with 51 mm self-tapping screws. The distance from the “nose” of the window sill to the top rail is 8 mm. This distance is necessary for the installation of sheathing panels.

Top rail installation

Using a plumb bob, install the bottom rail. Grab it with self-tapping screws to the floor along the edges. Align the lower guide with a level and fix it with self-tapping screws to the floor in 50 cm increments.

Mounting the bottom rail

Attach vertical guides (slats) to the top and bottom rails.

Fixing vertical rails

Align the board with a square (at 90° or tilted inwards by 2-3 mm from the level). Screw in 71 mm self-tapping screws to the end.

Leveling the window sill with a square

Fasten the middle guide to the vertical slats.

Fixing the middle frame

Skillful hands - two ways to do it yourself

It is quite real to save on the purchase of a plastic panel! To do this, you can go the following ways:

Install concrete window sill. To do this, make a fixed formwork and pour the first layer of concrete. Next, install the upper removable formwork. Lay a mesh of wire 1.5–2.0 mm with a cell of 50x50 mm. This will help strengthen the structure. Then - pour concrete and sand it after drying. On top, you can lay tiles or mosaics.
The second way to make a window sill yourself is to glue it from a floorboard. To strengthen the structure, dowels will be needed. The board must first be sanded and primed, and then varnished in several layers. It is better to install such a window sill on liquid nails.

Advice! For growing flowers on a wooden structure, it is better to use special overlays. They can be glued to wood.

Making a window with your own hands is both simple and difficult at the same time. On the one hand, it does not require serious skills and special tools. On the other hand, it will be quite difficult to correct the mistakes made. Therefore, it is still better to entrust the installation of window sills to professionals!

Replacing a window sill or installing a new one with your own hands is the most important moment in installing any type of window. The fact is that it is designed to play not only an aesthetic role in the interior, but also a protective one. It is on him that all kinds of temperature changes and mechanical loads are constantly affected. It is he who suffers from constant exposure to moisture and the rays of the sun. And it is all these moments that largely determine the features of its installation.

The materials used for the manufacture of window sills can be very diverse - wood, PVC, marble, etc. And, of course, all the nuances of the installation will depend on them to some extent. However, for this action, there is still a general list of recommendations that allow you to navigate the work algorithm itself.

The window sill is fixed inside the room and below the window opening;
Below, on the windowsill, at a maximum of 60 mm from its edge, there is a gutter - a teardrop up to 20 mm deep, necessary for draining water;
The final stage of installation begins only after the preparation of the lower plugs;
The lower part of the solution of the side slopes is cut down to the wall. Then the wall is cleaned of debris, dust, dirt, etc.:

The window sill is placed like this:

So that the board is in a strictly horizontal position (measured using a level), and the transverse slope of the window sill inward from the window box is approximately 3 0;
The wedges, which are the basis for the installation, should not extend beyond the wall. Therefore, with their correct installation, they will require additional fixation with plaster.
After that, they proceed to the removal of the window sill, wetting the wall with water and covering it with a lime-gypsum mortar, so that the level of the solution exceeds the level of the wedges by 15 mm;
The window sill is placed in the solution and pressed against the wedges with force until it stops;
At the last stage, the excess mortar is leveled and pressed flush with the wall plaster, followed by its rubbing. At the same time, the window sill itself enters the groove made on the bar at the bottom of the box. In relation to the side slopes located in the lower part, the same actions are performed - smearing with a solution and subsequent mashing.

It is possible to correctly install the window sill, so as to exclude its subsequent bending and breaking, by placing metal strips under it and inserting the ends of the latter into the lower plug. However, most often you have to deal with plastic and wooden window sills, during the installation of which strength and reliability can be achieved in your own way for each option.

Algorithm for installing the main types of window sills

Plastic

Installing a plastic window sill is very simple. Any special skills and abilities are not required here. It is extremely important to be extremely careful in the process of sawing PVC, when you should do without strong pressure so that scratches and chips do not appear at the cut site.

First, a cleanup is carried out;
Then, using the horizon level, they expose the window sill using beacons. By the way, when installing a window sill, it is tilted down by 5 mm so that the moisture accumulated from condensate does not linger, but flows down;
The free space is filled with mounting foam, the excess of which is subsequently carefully cut off with a construction knife;
In conclusion, the ends of the window sill are protected with plugs, and the window sill itself is cleaned of the protective film.

Such a window sill is fixed with a special mortar or glue, but you can also use screws on mechanical supports. In order for warm air to freely rise from the battery to the top, thereby drying the inside of the slopes and double-glazed windows when heating the room, the installation of a PVC window sill requires leaving a protrusion of up to 60 mm. In length, the plastic window sill should not exceed the width of the window opening by 15–20 cm. Inside the room, the protrusion of the window sill should be at least 5–7 cm wide. When installing a window sill of this type above a steam heating battery, as a rule, a slight gap is left.

Wooden

Installing a wooden window sill is more difficult, so they have already begun to forget about well-fitted wooden boards, although they are not only no less aesthetic and beautiful than plastic, but also more environmentally friendly. To properly install this type of window sill, you will need to pay attention, first of all, to the source material. The window sill board must be free from defects (such as knots and other defects), and, in addition, well dried.

The board is carefully cut off on each side,
After that, it is given the desired look and, of course, a selection of teardrops and moulds is made. Under the teardrops are meant gutters 7-9 mm wide and 5-6 mm deep, located at the bottom of the window sill board at a distance of 2-3 cm from its front side;
At the end of processing, the board is cut to the desired length, and it is given the desired shape. It is important to place all window boxes horizontally at the same level. By the way, it is also possible to create composite window sills connected with dowels, dowels and glue. The optimal length of the window sill is 10 - 15 cm more than the width of the window opening. And the optimal protrusion inward should be 5-8 cm less than the width of the window opening.

Do-it-yourself window sill installation in this case is done as follows:

Work begins with the lower section of the board, which is placed on the wall. It is on it that the felt treated with antiseptics is attached, which, with the help of a shred, is attached to a board nailed;
The prepared board is put on a quarter of the bottom beam of the box and fastened to the box with long nails, thereby fixing it even more reliably. At the same time, the nail heads are cut off and the cut off ends are driven into the lower part of the box bar, and then the window sill is planted on the ends of the protruding nails. If you have to deal with brick or stone walls, the window sill will have to be fixed using a lime-gypsum mortar. The window sill should deviate into the room by no more than 2 0. If its ends must be embedded in concrete or plaster, they must be treated with antiseptics.

The installation of the window sill is carried out by the masters of the Window Repair service company on windows, thresholds of balcony doors, inside balconies and loggias.

There are several types of window sills. For example: wooden, standard PVC window sills pasted over with a film with a certain texture, window sills made of natural materials.

Standard PVC window sills have a wide palette of colors and a smooth surface. You can choose the color according to the RAL table or according to the samples of our craftsmen.

The main advantage is considered to be low cost and resistance to mechanical damage. Their disadvantage is that over time, these products tend to change color under the influence of sunlight and ultraviolet rays.

Submit an application, and our specialist will arrive at the appointed time to complete the work.

A few more common types of window sills made of various materials.

Wooden. Made from solid wood. Wood can be used, both ordinary species and more expensive ones (oak, ash, larch, mahogany, chestnut). Depending on the selected wood, the window sill will have its characteristic characteristics and appearance. It is possible to install such a window sill on the balcony.
Available in MDF or PVC. Cheaper compared to natural wood products, but having good moisture and heat resistance characteristics. They can be made with a variety of patterns that imitate the fibers of oak, ash, birch, American walnut, as well as the structure of marble, granite.
The most expensive option is the installation of a window sill, the price of which is significantly higher than PVC, and it is made natural or artificial stone. The high cost is explained by the fact that the process of manufacturing products from natural stone is quite complex and time-consuming.

Almost all window sills have their own individual size (length, depth). The thickness of the window sill will depend on the material from which it is made and on the manufacturer. There are window sills with a thickness of 18 to 50 mm.

Depending on the brand of manufacturers (for example: RBC, Danke, Moeller), the prices for their products will vary significantly. The maximum allowable load on the window sill, for example from flowers or decorative elements, is not a constant value and depends on many factors. For example, the material of manufacture, the installation technique, the quality of fastening.

Installation scheme

The scheme by which the installation of the window sill and slopes is standard, and may differ only in the details used as fasteners. There are three most common ways to attach a window sill. The first way, fastening the window sill to the window profile using self-tapping screws. With this method, the window sill slides under the profile of the window frame and is screwed to it with self-tapping screws, the gap between the window sill and the window opening is foamed with mounting foam. The second way, installation with the use of a special clamping bar, which is mounted to the window profile and then the window sill snaps into it, while being securely pressed against the window frame. And the last third method, installation using plastic linings, which are installed under the window sill. The use of special clamping strips as fasteners is not very common, mainly the installation is carried out on wooden or plastic linings, and the distance between the window opening and the window sill is filled with mounting foam, which, after polymerization, will keep the window sill from moving in a horizontal plane. To seal the place of contact with the window frame, a special adhesive COSMOFEN PLUS for plastic is used.

Window sills are successfully used for facing and giving an aesthetic appearance to the thresholds of balcony doors. The material from which the window sill is made, used as a threshold, must have sufficient density and wear resistance. Installation of a plastic window sill is carried out by the masters of the Window Repair service company on windows, thresholds of balcony doors, inside balconies and loggias. Installation of slopes and window sills at an affordable price, a task that only experienced specialists can handle.

Work procedure
The standard procedure by which the application is processed and the window sill is installed is as follows:

Receiving an application takes no more than 10 minutes. In the process of accepting the application, the manager will ask all the questions of interest and specify a convenient time for the measurement.
Measurement is performed by a specialist within half an hour. The master will determine the length, depth and help determine the choice of material for the manufacture of the window sill.
The conclusion of the contract.
If the master has with him the necessary volume of the profile for window sills and ebbs, with the necessary characteristics, then it is possible to manufacture and install immediately after measurements.
If the manufacture of a window sill is required, it takes about one day.
Delivery to the site, dismantling, installation of a PVC window sill and delivery of work also takes place within one day, if the number of installed products allows it.

Company "window repair" practices an integrated approach. That is why, contacting the company, the customer does not have to wait long. All work on replacing and installing a window sill, or installing window sill boards on the threshold of a balcony door, takes no more than 2-3 days from the date of application.

When installing a window sill, a very important point is how many centimeters its protruding part overlaps the heating device. The window sill should not cover the battery completely, or do it no more than half. This is necessary for normal convection, warm air and to prevent condensation and fogging on the windows. At the ends of the window sill, plugs must be installed without fail. They are not attached with COSMOFEN PLUS plastic glue.

Order installation in the company "Window Repair"
If you need a service for installing a plastic window sill in an apartment, house, cottage, townhouse or office, all current prices are listed on the company's website in the "prices" section. To call the master and measurer right now, please call the number listed on the site. Experienced managers will be happy to provide you with support in choosing the necessary products and will consult on the price of installing slopes and PVC window sills.

Our main advantages:

We carry out the installation of window sills on the day of treatment;
Works with well-known manufacturers of window profiles and fittings;
We have been installing plastic windows since 2006;
Thousands of satisfied customers;
Guarantee for the performed works from 1 year;
Experienced highly qualified specialists;
Flexible payment system;

When ordering, it is worth remembering that saving on the quality of the window sill profile and components can lead to additional costs for premature repairs, due to the loss of the appearance of the product. Remember, saving on the involvement of professional installers to install the window sill on plastic windows will definitely affect its appearance, quality and, accordingly, shorten the life of the product. Contact the service company "Window Repair", you will not regret it!

The window sill is an interior detail that hides the visually unpleasant view of the bare wall of the building at the window. Also, this part is constantly used in everyday life - as a shelf or even a seat.

The location of the window sill at the window implies that it has certain properties - the material of the object should not melt in the sun, it must have a high resistance to mechanical damage.

Most often used window sills:

Wooden- environmentally friendly, but over time they begin to succumb to both physical and mechanical damage. Especially when the active properties of the protective coating are lost. The operation of such a part is difficult, and the price is quite high.
PVC- window sills made of this material are more suitable for modern buildings. They are highly resistant to scratches, sun and water. Over time, they do not rot, and modern PVC does not change color even after many years of operation.

The classic installation of PVC window sills with your own hands is carried out in several stages and does not take much time. When carrying out work, care must be taken not to spoil the working material.

Planning and layout

PVC window sills of the modern type are available in various sizes, the most common samples are 60 cm wide. This size allows you to install the window sill on almost any wall of modern buildings, even in brick houses with a wall width of 680 mm.

Before you install the PVC window sill in its place, you need to mark up according to the following method:

The width is measured from the frame of the double-glazed window to the edge of the window opening.
The window sill is cut to the measured width, plus a couple of centimeters. The outlet can be chosen independently, but a large canopy can prevent the normal distribution of heat coming from the radiator.

If the width of the installed part does not really play a role, it is better not to make large outlets - a violation of the circulation of warm air can cause condensation on the windows. Pay attention to the protrusion of the window sill in the photo for this article.

At this stage, it is necessary to plan at what height the structure will be installed, and decide on the ledge - at the next stage, trimming is carried out, after which nothing can be returned.

pruning

Giving the window sill the desired shape using trimming is done using a jigsaw or saw with fine teeth. If the cut is made with a power tool, do not forget to use safety glasses.

The detail is cut in three places or in one place, but then you have to hammer the sloping walls. Let's take the method of cutting from three sides as the first method, and working with walls as the second.

The classic instruction for performing work according to the first method:

The required width is marked from the front edge of the window sill.
According to the intended dimensions, a flat bar is applied and an incision line is made. The excess part is trimmed.
The width of the window opening is measured. The part is cut to the measured width, plus 10 cm.
On both end edges, cutouts are made for sloping walls. Parts of 5 cm are removed along the length on each side, the width of the cutout is equal to the width from the window frame to the edge of the window opening.

Therefore, the most profitable option is the second method:

Trimming in width is carried out similarly to the first method.
From the bottom of the sloping walls, using a perforator, recesses are made 2 cm high and 5 cm deep.

After that, parts do not need to be cut out in the window sill in order to go around the walls, it is simply inserted into the recesses made, which are then sealed with putty.

Advice!
In order not to engage in trimming at the stage of installing windows, it is possible in the process of constructing the walls of the building to foresee recesses in the sloping walls.

Gasket device

As a gasket, ordinary wooden blocks are used.

Such a substrate is used to make the window sill structure more rigid - PVC itself is thin and can bend under strong impact.

Planks are cut to a width equal to the size from the window frame to the edge of the window opening, minus 1-2 cm.
The bars are laid at a distance of 20-30 cm from each other and fastened with screws or cement-sand mortar.

If the wood spacer is fastened with screws, the heads must not protrude.

Window sill installation

Sequential installation - how to properly install a PVC window sill

Most of the work is occupied by the preparation, calculations and arrangement of the substrate. When everything is prepared, the direct installation of the window sill takes just a couple of minutes, plus half an hour to fix it.

Installation and fixation are carried out according to the following technology:

The window sill is inserted into the window opening and slowly moves in the window frame.
When the edge of the part to be installed approaches the place of insertion into the frame, starting from one edge, it is necessary to knock the window sill to the junction with deaf precise blows.
Coal-shaped metal plastics are used as fasteners. One edge is attached to the part protruding beyond the boundaries of the window opening, the other to the wall under the window. This step can be safely skipped if the window sill is not used as a seat.
The gap between the window opening and the window sill is blown with mounting foam to a depth of 5-10 cm. (See also the article

Note!
If you decide to blow out the entire space between the window sill and the window opening with foam, do not forget to firmly fix the installed part - it can be lifted from the pressure of the foam.

In the future, the gap, blown out with mounting foam, is sealed with putty. The same happens with the recesses in the walls, if they were performed.

A visual installation process can be viewed in the video in this article and illustrations.

Glue mounting

The installation described above, although durable, but the mounting foam loses its properties over time. Therefore, some owners prefer to install window sills on a rigid base.

This technology has several advantages:

Materials that will soon lose their working properties are not used.
Installation is carried out on a rigid base, the installed product withstands very strong mechanical loads - you can sit and stand freely on the window.

The installation process is carried out according to the technology:

Marking, cuttings are carried out according to the classical scheme.
The wall on which the installation will be carried out is cleaned, all debris and dust are removed.
On it, using a cement-sand mortar or glue, a screed is made. The height is adjusted so that the window sill fits into the installation point in the frame.
The window sill is attached to any silicone adhesive, you can use liquid plastic to repair plastic windows or hermetic compounds, tile adhesive. You can also simply drown the part in the screed.

When using any of the proposed installation options, remember that the replacement and repair of plastic windows is carried out together with the lower part, so try not to damage the window frame during the work. Happy repair!

The internal window sill is an integral part of any plastic window. Such a design is needed in a dwelling for additional insulation of the junction of the window frame and the wall, as well as for the window to have a finished look. It has the following advantages over other materials:

wooden structures need constant care, and are also damaged quite quickly;
stone window sills are distinguished by rather heavy installation, which is unrealistic to implement;
plastic structures are reliable, durable, beautiful;
have a long service life;
are easy to install;
plastic sheet is resistant to moisture;
the material has an affordable price;
plastic is resistant to chemicals;
the material is plastic and light in weight, it is easy to cut and install it with your own hands;
the canvas has high thermal insulation;
For installation, you do not need special tools, you can get by with improvised tools.

In this article, we will talk about how to properly install a plastic window sill on a window, since such designs have recently been very popular.

Preparatory stage of work

Before proceeding directly to the installation, it is necessary to prepare the workplace. To do this, you will need the following materials and tools:

level;
jigsaw;
roulette;
hacksaw;
pencil;
mounting foam;
foam gun;
perforator;
drills for puncher;
a hammer;
chisel;
wooden bars;
bit.

The window sill is installed in such a way that it enters the side wall, so it will be necessary to cut out connectors about two centimeters deep in the slopes.

To carry out this procedure, you need to attach a plastic window sill to the wall and make appropriate marks on it with a marker, then carefully knock out the grooves. Such an operation requires maximum concentration and accuracy, otherwise it will take a long time to restore the slopes.

Important! In order to minimize damage to the slopes, they should be handled very carefully during the entire installation process.

The slopes are made of gypsum plaster. In this case, the procedure can be carried out with a hammer or chisel.
Concrete slopes. Then you can make recesses for the plastic window sill using a perforator.

Read also: How to choose and replace the seal on plastic windows

After performing all the above manipulations, it is necessary to clean the stand profile and the lower part of the window from pieces of plaster and dust, since these materials are used to install the window sill. Then the cleaned surfaces are moistened, it is better to use a primer for these purposes, which strengthens the surface.

Note! In order to prevent the appearance of drafts from the window, it is necessary to blow out all the cracks of the window frame well with foam.

Fit to size

Do-it-yourself window sill installation is not a complicated procedure that requires minimal cost and time. However, each window frame has its own characteristics: bulges, roughness, cracks. Therefore, before installation, if there is a finished canvas, it is necessary to cut a blank for the window sill from it. For this, the width and length of the future structure is calculated.

It should be understood that the length of the canvas should be slightly larger than the width of the window, and may go beyond the boundaries of the slopes. Basically, this output value is five, six centimeters.

The width is calculated by the formula: the width of the protruding part of the window sill + the depth of penetration of the canvas into the stand profile + the width of the surface under the window sill.

Also, on the sides of the plastic blank, you need to cut rectangles that allow it to easily enter the slope. Cutting plastic is pretty easy. To do this, use a hacksaw, grinder or electric jigsaw. If notches appear when cutting the material, then you should not worry, since all defects will be hidden by plastic overlays.

When the blank is made, it must be tried on. To do this, place a plastic blank on the surface of the window sill and slide it over the slopes and the stand profile. At this stage, it is necessary to eliminate all inaccuracies in the measurements, if any.

Installing a window sill horizontally

Before the final installation of the plastic window sill, the canvas must be leveled. To do this, linings are placed on the surface of the base. Such an operation is quite simple to perform on your own. For a regular window, you will need two linings, and for a balcony window, three.

Wedges must be placed strictly at the level of the window, such a procedure makes it possible to qualitatively align the window sill blank before installing it. Then you need to set the optimal angle of inclination. Such manipulation is required to eliminate condensate in a natural way. To do this, the edge of the slab is lowered by several degrees, and the slope angle is measured with a building level. In order for the opening to be even, these parameters should be checked in the middle and along the edges.

Read also: Installation of plastic windows. Stages of work

You need to adjust the level with linings. For wedges, it is better to buy special plastic elements in advance, but wooden bars can also be used. It is necessary to mount a plastic window sill in such a way that there are no gaps between the canvas and the window frame. For this, clamping plates are used. Which are attached to the stand profile.

Installation (propenka) of the board

In order to properly fix the window sill yourself, you must perform the following steps:

Once again moisten the bottom of the opening and the slab.
Clean the part of the canvas that will be installed under the slopes from the protective film.
Then, using mounting foam, blow out the gap between the profile and the bottom edge of the opening.
Then apply a wide layer of foam on the entire surface of the base, especially carefully treat the far corners. At this stage, it must be taken into account that the thickness of the foam should not exceed the thickness of the installed wedges, otherwise, when solidifying, the material can greatly lift the plastic window sill.
Next, to evenly distribute the load on the plastic window sill, you need to put a load. It is recommended to do this on the inner edge of the board.
The window sill is installed, now it remains only to wait until the mounting foam dries.

Installation of a window sill on a balcony

Nowadays, it has become popular to install not only windows, but also balcony structures from plastic. Such material retains heat well in the apartment and saves usable space. However, it should be understood that the installation procedure itself is quite expensive. Therefore, many residents of multi-storey buildings perform the procedure on their own.

Before you start replacing the plastic window sill, you need to prepare metal brackets. They are necessary if it is not possible to get the canvas under the window frame. The brackets are fixed to the parapet with anchors, which increase the load on the PVC board and reinforce the entire structure.

Brackets are installed at a distance from each other, which does not exceed one meter. After installing the panel, you need to check the angle of inclination with a building level. Before fixing the holders for the canvas, you need to tighten the thread well. This operation makes it possible to align the PVC board horizontally.

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