Proper installation of plastic window sills. Installing a plastic window sill with your own hands

The role and significance of the window sill cannot be overestimated, since it is not only a beautiful window element that performs a decorative function. It does not allow cold air from the street to penetrate inside the house, thus playing an important function in the thermal insulation of the room. In this regard, do-it-yourself window sill installation should be done with maximum accuracy and accuracy, in compliance with all norms and rules! We will talk about the basics, features and nuances of this in our article.

What is the window sill made of?

Modern window sills can be made from a wide variety of materials. Depending on this, the installation method also changes.

Made of plastic

PVC products from year to year are becoming increasingly popular in construction. The situation is similar with plastic window sills, which are distinguished by a whole list of advantages:

Easy to install with your own hands;
Manufacturers place a special laminating film, which can be decorated with various images and colors, which makes it possible to choose a model the best way suitable for the style of the room;

Retains heat well indoors;
Plastic tolerates moisture well and is not afraid of mold and fungi, which is especially important for indoor plant lovers;
The surface is easy to clean;
Thanks to stiffening ribs, modern plastic window sills perfectly tolerate mechanical stress;
Temperature fluctuations are not terrible;
Under prolonged exposure to sunlight characteristics plastic window sill do not worsen.

However, despite a lot of advantages, PVC window sills have a number of disadvantages:

High temperatures on the surface, for example, the lid of a hot pot, can damage the product, causing deformation;
The laminating decorative film is easily scratched, in addition, it may peel off over time;
Artificial origin of the material.

And although PVC products have some drawbacks, however, most often the owners of apartments and houses choose it, performing self-installation window sill.

stone board

Connoisseurs of natural often prefer stone window sills. In most cases, this applies marble and granite. Of course, stone models are distinguished by their unique natural image on the surface and beauty in general, but such pleasure cannot be called cheap!

Along with this, on a carefully polished surface natural stone you can easily put an ugly scratch, their thermal insulation leaves much to be desired, and many contaminants, whether it be tea, wine or coffee stains, are easily absorbed by the material. In addition, the large mass and cost of the material leaves no chance for self-installation, forcing you to hire professionals for this.

A window sill is considered a worthy alternative to natural material. from artificial stone . It is made of acrylic and is not inferior to the natural counterpart in terms of beauty, heat resistance and strength. An additional advantage of a stone window sill made of acrylic is that the surface is not scratched, and the product itself is much cheaper.

MDF and chipboard

Window sills made of chipboard and MDF panels remain more budget option compared to wooden products. Many manufacturers make window sill boards from fibreboard and chipboard. From above, such models are covered with a special film.

Chipboard is less moisture resistant and durable material than MDF - if the protective film is damaged and moisture gets on the chipboard, the latter may begin to swell, which will lead to noticeable deformations of the window sill. MDF boards are more stable, but their price is higher.

Window boards made of wood fiber and shavings are easy to clean, the main thing do not use abrasive products for this!

from wood

Such types of wood as pine, cherry and oak have long been the usual material for the production of window sills. Wooden window sills remain very popular today.

Installation wooden window sill do-it-yourself begins with thorough drying and processing of the material varnish and antiseptic composition.

The main advantage of a window sill made of wood is its noble appearance and natural origin. However, the solid wood is subject to deformation, and the material itself is not cheap. It will be possible to increase the performance of a wooden window sill if you avoid contact with aggressive chemicals, water and abrasives. In addition, it is worth updating the coverage from time to time!

Subject to compliance with all technological norms and requirements, window sill boards from are more resistant to negative external factors and lower price tag.

Do-it-yourself window sill installation

Regardless of the type of window sill, installation is carried out according to one scenario. And since in most cases PVC window sills are mounted on their own, using them as an example, we will step by step tell you how to install a window sill with your own hands, highlighting the features and nuances of the work along the way. In the end, we will touch on the features of mounting structures from another material.

Board length and width

Before purchasing the material, it is worth accurately measuring the proportions of the future window sill. The length of the window sill is measured as follows:

The width of the opening is measured near the window, as well as against the wall from the side of the room;
In order to hide the edges of the board inside the slopes, it is necessary to add at least 1 centimeter to the maximum width of the opening;
If you plan to place a protruding window sill in the room (which does not go flush with the wall), then, in addition to the dimensions of the board, you should also consider the size of the eyelets.

Measure the width of the wall to the window for the most accurate measurement of the width of the window sill. To this value, add 1.5-2 centimeters, which will go as recesses into the grooves of the window. This will be more than enough when installing the board flush with more or less even walls.

Important nuance! If the walls have irregularities, then it is worth accurately measuring the distance on both sides - this will make it possible to make the installation with your own hands as evenly as possible.

If desired, you can organize a small protrusion, but its size should be no more than 8 centimeters, otherwise air convection may be disturbed, which will cause ice formation in the cold season and uneven distribution of heat in the room.

Based on the dimensions obtained, the window sill board is adjusted in width and length. After that, you can proceed directly to the installation of the window sill with your own hands.

Dismantling the window sill (photo)

Installation procedure

Place the future window sill at the installation site. Trim the board if necessary.

In the case of chipboard, wood and MDF, it is better to cut the material jigsaw, for stone and plastic is better suited Bulgarian!

If necessary, make grooves in the wall surface with a puncher. It is here that the edges of the window sill will lean in the future.

Thoroughly clean the surface of the workpiece from debris and dust.
Remove from the inserted edge of the board protective film and insert the window sill into the window profile.
Starting from the extreme sides, wooden wedges are installed under the window sill. In this case, the maximum step between the wedges should not exceed 40 centimeters, and the inserts themselves should not extend beyond the inner edge of the window sill and the wall.

The level of the window sill is checked using a spirit level. In the case of a slight deviation from the horizontal, the level of the board is corrected by driving in additional wedges.

It is important to emphasize that the slope angle to the inner edge from the window should be about 2 millimeters! Thanks to this, water will not accumulate at the window, simply flowing down.

Any load is placed on the windowsill, while the total mass should be in the region of 10-20 kilograms.

After checking and leveling the board in a horizontal plane, the board is fixed in place. For this purpose, mounting foam is usually used. For best quality work worth enjoying professional foam, as well as a special pistol, with the help of which the foam will be sprayed. At the end, with the help of self-tapping screws, additional fixation to the profile from the outside is carried out.

Important point! If the foam is in a place where it should not be, immediately clean the surfaces with a cloth. hardened foam it is worth cleaning, armed with a special solvent.

After a day, the excess foam is cut off, and all excess load is removed from the window. At the end, the protective film is removed and end caps are installed.

If you are planning to install a wooden window sill, then inside boards worth placing felt treated with antiseptic. This is done through shingles. In the case of stone window sills, the ends are similarly protected with a felt layer. In other moments, the installation of a window sill made of wood and stone is no different from a plastic counterpart.

Thus, do-it-yourself window sill installation is carried out, as you can see, there is nothing super complicated here, especially when we are talking about plastic construction. The main thing is not to overdo it with the application polyurethane foam and observe care and precision while working.

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 specifications offer a wide range of installation benefits.

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. Additional advantage– 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 complete and aesthetic appearance window.

Measurements should be taken from concrete base.

Advice! When measuring the depth, add 15 mm to go under the frame and 50 mm to reach. This optimal dimensions 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 from plastic board protective film before the end of all repair work.

Advice! When installing a window sill protective covering 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 mounting seam from 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 on top vapor barrier tape. 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 support 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

Classic way how 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 energy.

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.

IN plastic frame screw in self-tapping screws 51 mm 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

On the lower part plastic board, attach the upper guide from a beam 40 mm wide. 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

Save on purchase plastic panel is quite real! To do this, you can go the following ways:

Install concrete window sill. To do this, do not removable 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 wooden structure better use special pads. 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 tool. 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!

Modern construction trends imply the use of the most ergonomic materials. The requirements of an ordinary buyer are as follows - the material must be light, durable and inexpensive. Previously, wood was almost universally used, but now it is considered a premium material. Instead, plastic came to him - it is more durable, cheaper and has almost limitless 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 put a window sill and slopes. Each element performs important role in Everyday life, and which selection and installation must be approached very carefully.

Installation technology

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

In addition to all this, the window sills with their protrusion delay the rising from the batteries 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 stand 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 any) hammer drill or perforator);
wooden or plastic pads for leveling the surface;
building level.

According to the established rule, the window sill should be included in side walls at least 3 cm. Using the tool, it is necessary to make special recesses at the level where the surface will be located.
If a new one is installed, then 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, you will have to look for it in specialized stores or make it to order. To measure the product, it is best to invite a specialist - he will accurately set the parameters of the product and will be responsible for this.

It is important to make sure that after installation plastic window putty, mortar and foam are completely dry. After that, you can begin to prepare the working surface - it must be clean, without extraneous protrusions, dust and construction debris, 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, mounting 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 will not become as it should. To solve this problem, sandpaper and a hacksaw will come in handy - in the right places, the finished canvas is adjusted to the installed place. If it is possible to start fitting the window sill from the side of the wall, it is better to start from it, using a hammer and chisel or a strong screwdriver. As a result, the window sill should confidently fall into its intended place, not hang out in the grooves of the side walls, but also not rub too hard.

For prepared work surface need to sprinkle plain water using a broom or a mechanical sprayer - it will be much easier for the mounting foam to stick to moisture, which will make it much easier to work with it. This stage is very important, because. It is the mounting foam that is the main fixing material.
Three holes are intended 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 - an unsuccessful gap will be visible during the operation of the dwelling.
The most important part of the installation is setting the surface according to the level. To measure indicators, the mounting level is used. To adjust the angles of inclination, plastic or wooden plates are placed under it. The slope must be set slightly towards the room so that moisture does not linger in the groove between horizontal surface and the window and there did not start mold and dampness.

After the correct level is set, 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 mounting foam swells.
All empty space under it is carefully and carefully filled with mounting foam. Designs allow to stand for at least a day.
After the foam dries, its remnants are cut off with a knife - and the window sill is ready for use.

slopes

An ideal addition to the window sill will be slopes of a similar material.
This option has next undeniable advantages:

relatively cheap materials;
easy installation that does not require the help of specialists;
reliability and durability;
ease of maintenance.

Slope installation procedure

The slopes are made up of the following items- sandwich panel, F-profile, wooden planks and self-tapping screws. All the irregularities of the unprepared wall are hidden under the panel.
Wooden planks are stuffed on the edges of the slopes for the entire height and width of the window opening. On top of them, an F-profile is screwed onto the screws, which has special grooves for installing a plastic panel.
Completion of the profile and the plastic panel occurs with the help of scissors for metal. The main task is to prevent ugly gaps.
Directly under the panel on the wall can be put mineral wool or fill the space with polystyrene foam - this will relieve drafts and significantly insulate the walls.

Conclusion

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

A detailed video instruction can be viewed on the video.

Before installing the window sill plastic windows, you need to determine the material that you will use. Most the best choice This is an acrylic window sill. Unlike ordinary PVC coating, acrylic film is protected from cigarette burns, sand abrasions and other mechanical influences. At the end, the entire list of types of window sills is indicated, we will focus on a plastic window sill.

It is more difficult to install a window sill with your own hands, but at the same time it is cheaper, and you will gain experience. After the installers have completed the installation of windows, you can immediately begin fixing the window sills. Tools you will need to get the job done: construction foam, wooden blocks, or plastic inserts, a level, or a corner, a grinder, a puncher or a hammer.

The first stage is the repulsion in the slope of the protrusions for attaching the window sill. IN pvc windows grooves are provided below, where the window sill should fit, but no one foresaw such a connector in the walls. If you have big house, then by shortening the distance of the protrusions you can save a whole 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. Further, 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 beat off the protrusions later, if you have concrete walls, then you need a puncher with a set of chisels.

Why is it blowing 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. Quickly installing the window sill without checking this nuance, you will never guess why It's cold in your apartment, so be careful.

When you blow out the holes, start cleaning the grooves and the place where the window sill will be installed. Any small pebble can become a major hindrance during installation. After you remove the "large" obstacles, start cleaning the rest of the area - sweep the future parking lot of the window sill with a brush.

Before using the foam, it is important not only to clean the area, but also to moisten it - construction foam acts in places where there is moisture. We recommend that you use a 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 wooden blocks or plastic inserts, which we talked about at the beginning, to equalize the level of the window sill. It should be placed exactly at 90 degrees to the window. Determine the level of the window sill, and then insert your blanks into the voids between the wall and the object to be installed. You can determine the degree both with the help of a level, and with your own hands using a corner.

When you're done measuring, start blowing foam. It is very important that the foam is distributed around the entire perimeter. Please note that after a while 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 windowsill.

In order for the window sill not to rise due to the increasing foam, it is necessary to install a load on it. Great solution there will be installation on the windowsill of 5-liter bottles of water. Three is enough.

At the end of the installation, seal the joints with sealant.

Price of materials

It does not make sense to take 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, according to the idea, should be available in the room where the repairs are being made, 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.

Types of window sills:

Monomaterial (wood, granite and other stone, PVC window sills)
Composite differ in the material of the board and film.

Types of boards:

polyvinyl chloride;
chipboard or fiberboard;
wood-polymer composite;

Types of films by type of coating:

polyvinyl chloride;
veneer;
laminated paper (High Pressure Laminate, Continious Pressure Laminate, EPL-coating)

Types of films by abrasion:

PVC film (paper, varnish)
Elesgo film (electron beam hardened surface).

Video

It's no secret that a window without a window sill looks at least ridiculous - at least some decorative "platform" under the window should be present. To date, you can decorate the bottom of the window opening in three ways: tile it under, install a wooden or plastic window sill. The latter, or rather, its installation, will be discussed in this article, in which, together with the site site, we will study in detail the question of how PVC installation do-it-yourself window sill Special attention Let's focus on the subtleties and nuances of this process.

Do-it-yourself PVC window sill installation photo

Installing a PVC window sill with your own hands: preparing a window opening

In construction and repair work preparatory work not to do anywhere, including when installing a PVC window sill. Here, almost everything is standard - we clean the lower part of the window opening from construction debris left after the dismantling of the old window sill or window, carefully prime the surface and leave to dry.

Dismantling the old window sill photo

In addition to the standard procedures associated with cleaning the window sill installation site, other preparations must also be made. Or rather, not cooking, but control - if you want not to see through from under the windowsill, then you should check the quality of foaming window frame and, if necessary, correct any deficiencies. This nuance in the work should be especially taken into account in the case of installing a plastic window sill that is not associated with a complete replacement of the window unit.

In addition, if the slopes in the opening are already ready, it is necessary to cut their bottom so that the window sill “goes” under them. It can be done different ways- but in all cases, you need to understand that the less you injure the slope, the easier it will be to restore it later. At this stage, everything. Now you can proceed to the direct preparation of the window sill itself.

Preparatory work before installing the window sill photo

Preparing a plastic window sill for installation

This stage is also not particularly difficult - all you need to do here is to cut it correctly and fit it to length. Plastic is cut easily with almost any saw tool - you can use a hacksaw for wood, and, and, and a metal blade. Most the best option for cutting PVC window sill is .

The task of fitting the window sill is to cut it correctly in length - this must be done in such a way that it freely falls into place and at the same time its edges do not peek out from under the slopes.

How to install a plastic window sill photo

How to install a plastic window sill: installation features

When all preparations are made, the new window sill is trimmed and the bottom of the window opening is cleaned, you can proceed to direct installation. This process looks like this.

Installation of a plastic window sill begins with the process of its installation. To begin with, it must be inserted into place and positioned so that not a single edge of it peeks out from under the slopes - the window sill must be inserted under the window frame.

Do-it-yourself plastic window sill installation photo

The next step is to wedge the window sill between the window opening and the window frame. For this purpose, as a rule, wooden wedges are used - they are installed along the edges of the window sill and in the middle. When installing them, you need to control the absence of a gap between the window frame and the window sill.
When the fastening of the far edge of the PVC window sill is finished, you should deal with its front edge. Between it and the window opening, you also need to install linings that will ensure an even horizontal level. The whole process of installing a plastic window sill with your own hands must be constantly monitored by the building level.

Role building level in PVC window sill installation

The final step in resolving the issue of how to properly install the window sill is secure fastening. As a rule, it is simply glued with the help, which is pumped into the space between the window opening and the window sill. Everything is simple here - shake well the warmed up in warm water a cylinder with polyurethane sealant, we wind a tube on it and, inserting it as deep as possible under the window sill, we blow out the entire space with foam.

How to install a window sill with your own hands photo

There is one caveat here - it's no secret to anyone that the foam, when solidified, greatly increases in volume, and in the process of expansion it creates considerable pressure that can lift the window sill up. To prevent this from happening, you need to put some kind of load on the windowsill, for example, five or six bricks. But first, in order not to damage the window sill, it is better to cover it with something.

It will be possible to remove the load in 12-14 hours - although manufacturers indicate that the complete polymerization of polyurethane sealant occurs within 6 hours, it is better to wait a little longer. By by and large, the hardening time of the foam depends on its volume - the more you inflate it under the windowsill, the longer it will harden.

Installing a PVC window sill: final work

And finally, a couple good advice about the installation of a window sill.

Firstly, before gluing the window sill, its back surface and the base of the bottom of the window opening must be thoroughly moistened with water. The fact is that the process of polymerization of mounting foam occurs faster when high humidity. In addition, it adheres better to wet surfaces. You can moisten the space under the windowsill with a spray gun, which is used to care for flowers or to moisten linen when ironing.
Secondly, do not pump too much foam under the windowsill - it will not get any better. The space must not be completely filled - it is better to make gaps between the stripes. So you save the sealant and prevent the window sill from undermining up.

This is how the PVC window sill is installed with your own hands. Whether it is difficult or easy, judge for yourself, and also decide how best to proceed - call a specialist or try to do everything yourself.