How to install a plastic window sill - your own master! Do-it-yourself PVC window sill installation - quick and accurate installation PVC window sill is attached.

When replacing old window structures, it is necessary to immediately install new window sills from modern materials. Today at the top of the popularity of plastic products. The width of the PVC panel is 60 cm, which makes it possible to install them with almost any wall thickness. How to install a plastic window sill qualitatively and reliably, read on.

Preparatory work
Exception - installation of wooden structures

Preparatory work

The preparatory stage includes the measurement and selection of the design, the selection of tools, the purchase of building materials. If the double-glazed windows have not been replaced, the old window sill will need to be dismantled. When replacing a window, the old window structure is completely removed. Installation of a new double-glazed window is carried out by the manufacturer's specialists. Installation of a plastic window sill can also be carried out by specialists or independently by the customer.

Installation of a plastic window sill is carried out only after installing the window frame and double-glazed window.

When replacing only the panel, you must first make the correct measurement:

Measure the width of the window opening. Throw another 10 cm and get the total length of the structure.
The width of the panel is equal to the distance from the installed window to the corner of the wall plus 5 cm per ledge. It is not advisable to make the base of the window wider, since air circulation is disturbed, which leads to fogging of the glasses.

Read a more detailed article on the topic: the correct height and width of the window sill.

Tools and materials

To install a plastic window sill with your own hands, you will need a set of tools:

carpenter level;
electric jigsaw or grinder;
carpentry knife and hacksaw;
ax and hammer;
square;
marker and masking tape.

From the materials should be prepared:

sealant;
gun and mounting foam;
window sill panel;
three sets of plastic or wood substrates of different widths;
two end caps.

Preparing the installation site for the PVC window sill

Installation of a plastic window sill

With the help of a hacksaw, an electric jigsaw, an ax, the old structure and the window frame are removed. The cement screed is removed along the edges of the wooden product. The opening is cleaned of broken building material, insulation.

Specialists install a new PVC window so that a distance of at least 5 cm is maintained between the base of the window opening and the lower part of the frame. The left opening will serve as a support for the new structure.

If you plan to install a PVC window sill with your own hands longer than the window opening, grooves are sampled on the sides at the base. To do this, you need a hammer and grinder. First, the wall is cut, and then the building material is carefully knocked out with a hammer. The height of the groove is such that the new panel fits easily. The length of one groove is more than 5 cm.

The distance between the base of the window opening and the frame is foamed with mounting foam or laid with insulation. After the foam has completely solidified, the excess is cut off with a carpenter's knife. When installing a plastic panel the size of a window opening, mark the attachment points of the brackets at a distance of no more than 80 cm.

Video: Installing a window sill

Before installing the PVC product, it is necessary to once again clean the base from debris and dust. Be sure to wet the brick with water to ensure adhesion.

Installing a plastic window sill

All materials are purchased and tools are ready to go. Start installing the window sill.

Determine the width of the structure. It can be the same as the width of the old base. When replacing windows and installing a new PVC product, its new width is calculated. Ideally, the edge of the panel is located in the same plane as the middle of the heating system battery. When mounting the panel, the edge of which protrudes beyond the battery, vent holes are equipped in the panel itself. Such holes are also made in the casing in front of the battery. They are needed for good air ventilation in front of the window, which protects the window structure from condensation.
Select the length of the plastic base. When two windows are located side by side, one holistic design is preferred. When installing PVC window sills in size equal to the window opening, the length of the panel is made shorter by 10 mm.

According to the selected panel sizes, they make an order at a hardware store. Shop masters immediately carry out trimming according to the specified parameters. Sometimes they buy a blank, and trimming is done at home on their own.

The support for mounting plastic window sills is made from substrates purchased in advance. The width of the bar must be at least 50 mm, and the length must not exceed the width of the product. The shortest underlay should be 100mm less than the width of the panel. Particular attention is paid to the thickness of the substrate. After installing the bar, the panel should enter the window sill space between the lower window frame and the substrate.
Before installing the substrate bars, the surface of the base is leveled with cement mortar. At least three substrates are required per design. The optimal distance between the bars is 40–50 cm.
The supports are aligned strictly horizontally and the correct installation is checked using a level in all planes. Make a control installation of the plastic panel. The result of the correct fastening of the substrate is a tight entry of the structure into the gap between the edge of the window and the support.
Do-it-yourself installation of plastic window sills begins with the removal of the protective film from the side adjacent to the window. Install plugs on the ends of the panel. Carefully insert the structure onto the fixed supports.
The panel is firmly in place. Align the product with light tapping in relation to the window frame. Carry out a control measurement of the level in two directions.
Left and right leave gaps of 5 mm, which makes it possible to protect the panel from deformation. At the end of the installation, the gaps are sealed with sealant.
Carefully foam the space under the plastic window sill with mounting foam. If the panel is poorly fixed, it will skew from the increase in foam in volume.
Spacers are installed along the edges and in the center of the window opening. They are made independently or bought transforming spacers in the store. They do not allow the mounting foam to lift the installed base of the window opening. When the foam hardens well, the spacers are dismantled and the excess foam is cut off.
After the slopes are installed, they begin to seal the gaps. Masking tape is glued along the edges. Fill the gap with silicone sealant. Remove excess and remove masking tape.
The protective film is removed after completion of work.

If you have stained the window sill with foam, read how to clean the surface of the foam.

Video: Installing a window sill

Exception - installation of wooden window sills

Window sills made of oak, pine, beech, ash or cherry wood make the interior of the house warmer and more comfortable. Giving preference to natural materials, many owners of apartments and houses choose natural wooden bases instead of artificial plastic. The stores sell wooden panels covered with varnishes of different shades with different surface textures. Having made your choice, proceed to install a wooden window sill with your own hands.

Wall preparation

The base is cleaned of dust and litter. The surface is moistened with water to ensure good adhesion. If there is a niche under the window, metal or wooden supports are laid horizontally on top so that the panel does not hang in the air. The wooden structure in this case is dressed in a metal frame.

Window sill alignment

Pre-expose the window sill with wedges, achieving its slope into the room by only 2 degrees. Along the window, the board is located strictly horizontally. When all the necessary indicators are achieved, the wedges are strengthened with a small amount of mortar by removing the workpiece.

Fixing a wooden window sill

A layer of mortar is laid on the base, covering the wedges by 5 mm. Mostly cement mortar is used, but putty or gypsum can be used. Install the window sill in place and firmly press it against the wedges until it stops. The excess that comes out is removed with a spatula.

Advice! For safety net, an insulating film is first laid on top of the solution to protect the tree from direct contact with the aqueous solution.

Sealing and reinforcement

For more reliable fixation from the side of the facade, long self-tapping screws are driven into the end of the wooden window sill through the window frame. After the fastening of the structure is completed, small cracks are sealed with liquid acrylic.

Now you know how to install a plastic window sill and a wooden structure yourself. Follow our advice and you will succeed. For better assimilation of the material read, watch the video we have selected about different editing options.

Video: Installation of the Window Sill. Installing Window Sill With Tile Adhesive.

Video: Work after installing a plastic window sill.

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.

Wood

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 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, the installation of a window sill with your own hands 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 the model that best suits 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, the characteristics of the plastic window sill do not deteriorate.

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 an independent installation of the 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 of natural stone, you can easily put an ugly scratch, their thermal insulation leaves much to be desired, and many contaminants, whether 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. 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 a 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.

Do-it-yourself installation of a wooden window sill begins with careful 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 contact with aggressive chemicals, water and abrasives is avoided. 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 have a 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 independently, 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 the protective film from the inserted edge of the board 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 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 the best quality of work, you should use 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. The frozen foam should be removed, 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 on the inside of the board it is 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 it comes to plastic construction. The main thing is not to overdo it with the application of mounting foam and observe attention and accuracy during work.

Nowadays, plastic products are gaining more and more popularity. This material is quite practical and reliable, moreover, not expensive. If you decide to replace wooden windows with plastic ones, and do not want to overpay for installing a window sill, or just want to install a window sill with your own hands, then this article is for you.

The preparatory stage includes measurements of the future structure, as well as all materials and tools, as well as preparing the window opening for the installation of a new window sill.

Before buying, you need to make several measurements, namely:

Window sill width. It is equal to the width of the window opening plus 10-15 centimeters.
Window sill length. Measured as the length of the window opening plus 10-15 centimeters.

It should be noted that a window sill that is too large and wide can significantly impair air circulation, therefore, water droplets will accumulate on the windows and their service life will be reduced.

From the tools, you should prepare or purchase:

Electric jigsaw or grinder.
Level.
Hammer.
Ruler corner.
Masking tape.

Materials you will need:

Construction foam.
Sealant.
End caps.
PVC panel of suitable size.
Plastic pads.

Surface preparation for window sill installation

First, you need to remove the old structure. This is done with a jigsaw or hacksaw. Next, you need to remove the cement screed around the edges.

Clear the area of debris, crumbling material, insulation and everything else. This will ensure that the new window sill is securely fastened. It is best to vacuum the base under the window sill, so you are guaranteed to reliably clean the base.

If you plan to install a window sill with ledges on the sides, then you should create small openings so that the panel enters easily. First, a wall is filed, then an opening of the desired size is knocked out with a hammer. The openings must be the same on both sides and such that the PVC panel can be easily inserted.

After cleaning the base under the window sill, it should be well primed to ensure adhesion of the mortar to level the base.

If you only plan to replace the window sill and the windows remain old, then the width and height will be the same as the width and height of the old wooden window sill. It will be enough for you to remove it and transfer the measurements to the PVC panel. If the windows are planned to be changed or new windows have already been installed, then the dimensions of the window sill are recalculated. It is important that the window sill is installed only after the installation of new windows has been completed. With accurate measurements before cutting, it is important to consider that the window sill should go under the window frame by 10-15 centimeters, and the protrusions on the sides should not exceed 5 centimeters. The window sill should be made at an angle so that the absolute height under the window frame and the height on the periphery differ by 2-3 millimeters.

Installing a PVC window sill with your own hands involves cutting the material. Cutting PVC can be ordered at a hardware store or you can do it yourself with a jigsaw.

Once you have your cut PVC panel, follow the instructions:

Cut the bars for the substrates. They can be both plastic and wooden. Their width should not be less than 5 centimeters, and the length is the same as the width of the base, excluding the window frame. The thickness of the substrate is selected based on the height of the window opening and the width of the PVC panel. Please note that the PVC panel must fit freely between the window frame and the substrates.
The optimal number of substrates is 2-3 pieces per meter of length. Before installing them, the base must be properly leveled.
The base is leveled with cement mortar or alabaster mortar. This is done so that the window sill does not have significant irregularities and maintains the integrity of the structure.
After the base is leveled, it is checked with a level.
Supports are installed every 40-50 centimeters. After that, they are checked by level in two directions. Supports can be tilted away from the window, but the angle of inclination should not exceed 0.5-1 degree.
To check the correctness of the installation of the supports, a control installation of the panel is done. If she enters well and lies down evenly, then work continues.
Before proceeding with fixing the window sill frame, you should first clean the window frames from the protective film and install the plugs on the ends.
The supports are securely fixed, and only after that, the plastic panel can be installed. In order for it to fit as best as possible to the base, it is tapped with a hammer. After that, again make control measurements of the level in two directions. If the panel lies flat, then work continues, if not, the panel is removed and the supports are leveled.
Small gaps should be left to the left and right to prevent deformation of the panel. At the end of the work, they are sealed with sealant. The gaps should be no more than 5 millimeters. This is done so that the foam does not deform the window sill.
All cracks and voids are filled with foam. Some experienced experts advise filling the voids between the supports not with foam, but with some kind of mortar, for example, gypsum or cement. In this case, the support will be securely fixed.
If you are afraid that the window sill may be deformed under the influence of foam, then leave a few weights on it for a couple of days. Although, this should not happen if you left small gaps on the left and right.
After the foam is completely dry, the excess should be removed with a knife, fill all the remaining cracks with sealant, align and putty the joints of the window sill with the wall. Thus, you will give your window sill a neater look.

In order to better understand the sequence of work, we suggest you watch the installation of plastic window sills with your own hands video.

Unlike plastic, wood gives the interior a touch of luxury and homeliness. But, at the same time, wood is a heavier and more capricious material.

The preparation process is no different from the preparation process for a plastic window sill.

The plane is cleaned and primed, leveled and supports are installed. The only difference is that the wooden window sill also needs a metal frame.

Wood is a rather heavy material. Small blocks of aerated concrete or wooden bars can serve as an excellent support for it. It is best if the gaps between these blocks are minimal. All cracks should be pre-filled with a solution of cement or gypsum.

So that the window sill does not hang in the air and is securely attached to the surface, screws are screwed on top of the base with a distance of 30-40 centimeters. The caps of the screws should stick out as far as necessary so that the window sill fits snugly against the base of the window frame and does not hang in the air. To prevent the caps of the screws from falling inward, they are coated with plaster or cement around. Then, building foam is applied to the plane. Particular attention is paid to the surface under the window, the rest of the space is filled with foam evenly.

After all the work done, a wooden window sill panel is mounted on top, blown with foam at the seams. After a few days, the foam is cut off, the cracks are filled with sealant.

Do-it-yourself window sill installation on a plastic window requires certain knowledge, therefore, carefully re-read the instructions and watch the training video before you start.

The installation of a window sill involves such basic types of work as: surface preparation, leveling, fixing the base, fixing the window sill, sealing the structure.