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A window sill is not only decorative element, on which you can place pots with plants, household items, but also a structural detail. Standard installation of a window sill on plastic windows can prevent sudden movement of warm air from the radiator to the ceiling. In this way, heat exchange inside the room is regulated and the lower structures are heated. Let's look at how to install a window sill on a plastic window yourself.

Types of window sills

Window sill blocks must be made of wear-resistant, quality material. Now on construction market available widest choice products for different tastes and budgets. The most popular designs for windows are made of stone, wood boards, plastic.

PVC window sill board

Such window sills are distinguished by good performance parameters and reliability. They tolerate conditions well high humidity, exposure to ultraviolet radiation, are almost not deformed and do not become moldy.

Another advantage is their ease of installation. Installation work will not take much time. This window sill does not require any coating or painting. Such designs are inexpensive, which is why they are in demand.

PVC products are very durable due to special stiffening ribs. Their surface is laminated, for which films based on acrylic resin or melamine are used.

Composite systems

This type of structure is created from 2 parts - a board that lies in the base and in the top covering (can be made of laminate, special film or veneer).

These products include window sills made of WPC, MDF or chipboard. Often the basis of chipboard is sawdust from deciduous and softwood.

Now many apartment owners correctly believe that installing chipboard window sills on plastic windows will be practical and economical option. Over time, this raw material does not swell from moisture and is not damaged. MDF boards are made from fine chips, which are processed in a special way and combined into blocks. This material It is environmentally friendly - it is safe for human health.

Window sill consisting of fibreboards, quite durable. The owners will not have any trouble cleaning such products. For washing, it is better not to use powders that scratch the surface. During installation work, it is recommended to lay thermal insulation at the ends.

Window sills made of WPC (wood-polymer composite) consist of polymers and special fillers made from natural materials. Plastic windows with these window sills have all the advantages wooden structures, are not susceptible to the appearance of mold. The surface of this product is more durable, and their difference from wooden structures is their resistance to fire.

This profile may be similar to plastic or MDF, depending on the amount of wood component used. WPC window sills can be coated with varnish or enamel paint, and finished using various types of films consisting of synthetic materials.

Wooden window sill

For facing space in window opening Wood has been used for a long time. The highest quality products are made from ash, beech, cherry, and oak. To create window sills, materials from other valuable species are used, for example, maple, mahogany. More economical ones include structures made of larch or pine.

Processing of raw materials is carried out in a large number of stages. It is dried, then sanded, covered with wax mastic and natural oils. The structure is treated with a special waterproofing impregnation and a layer of varnish. This ensures quality and ease of use of the finished product.
The cost of a slab made of natural wood is quite high. Window sill boards made from ash are 30% more expensive than oak boards, due to the fact that ash perfectly retains its shape. On window sills made of soft coniferous trees Over time, damage and pitting may appear. These window sills are cheaper.

For plastic windows wooden window sills have many advantages. They have good thermal insulation properties. This choice will be the best for owners if they want to use a similar window sill on a loggia or kitchen. Often, a window sill block is used as an additional working surface. Hot objects are placed on it, and moisture also gets on the windowsill. In order for a product to withstand such a load, it must be durable and of good quality.

Installation of PVC window sill

Installing a window sill to a plastic window requires certain skills from workers. Incorrect installation of the window sill can lead to poor thermal insulation of the entire window structure. The installation of this product is often carried out simultaneously with the replacement of the window frame. In terms of the consumption of monetary resources and materials, it is more economical, faster and more convenient. Let's study detailed instructions how to install a plastic window sill.

Determining the size of the window sill

Window sills that are made of PVC are best suited for plastic windows. The work must begin by calculating the size of the window sill for the desired plastic window. To determine how long the window sill should be, you need to measure the width of the opening with a tape measure. Add 60 mm to the resulting value. On each side, the window sill should protrude beyond the slopes by at least 30 mm. Otherwise, the plastic corner with the F profile, which is used when installing slopes, will significantly protrude beyond the window sill, which is considered unacceptable.

Width indicator plastic profile is determined quite simply.

It should be remembered that the permissible protrusion of the window sill from the opening is from 50 to 70 mm. Otherwise, it will block the battery, which will prevent the passage of heat.

This can cause not only fogging, but also the formation of ice on the windows. The window sill should be inserted approximately 20 mm under the window structure itself. Accordingly, these figures must be added to the depth of the window opening, which is measured from the profile to the wall.

Making a window sill blank

When installing a window sill with your own hands, you need to apply the obtained indicators. Then the window sill blank is cut out to the appropriate width and length. The cutting process is carried out with a grinder, as with its help you can get perfectly smooth edges. If this tool If you don't have it at hand, a jigsaw will do the job, you just have to cut it carefully. If you don’t have a jigsaw, you can saw off the workpiece using a regular saw.

How to fasten if the workpiece does not fit into the opening? It is necessary to cut out those parts that interfere with it. You can make the protruding parts of the window sill on the right and left recess into the wall. After the installation process on a plastic window sill, the recesses are filled with putty using this method.

The effect of solidity of the window sill and wall should be ensured. To do this, small recesses are made in the wall using a hammer drill. Then you need to attach a window sill to the opening and make marks for the cuts. Rectangles that interfere with installation are cut off on the right and left. Now the workpiece plastic window sill is completely ready for installation.

Surface preparation

Before installing a plastic window sill, it is necessary to clean the horizontal surface from construction debris and dust. The question arises, how to install the product correctly?

It should be taken into account that, regardless of the material used to make the window sill, it must always be installed at a slight inclination towards the room.

This is necessary so that water from glass condensation or watering plants does not collect under the frame. A tilt of a few millimeters will be sufficient.

Before attaching the window sill to a plastic window, you need to install special wedges or spacers, which should be fixed using gypsum mortar. They are needed to install the window sill to the required level. Then linings are prepared under the window sill. The linings should not protrude so that they do not have to be cut off in the future. Now a check is made to see how level the window sill can be installed.

Fastening a plastic window sill

There are several ways to attach a plastic window sill:

• Using two-component polyurethane foam (the most common method).
• On glue using spacers. They act like a press.
• For a special type of brackets. This also includes situations where the width of the window sill significantly exceeds the size of the window opening.
• Using special holding brackets.

Polyurethane foam is applied along the frame, a plastic window sill is installed and fixed. All remaining voids are filled with polyurethane foam. It should be remembered that the foam can expand greatly in volume, so you need to be careful and careful. When the polyurethane foam has completely hardened, you need to remove the spacers and check the quality of installation of the plastic window sill using a level. The places where the plastic window sill touches the frame and slopes are sealed with acrylic.

Caring for the window sill

Their polyvinyl chloride boards must be cleaned with water and detergents. For wooden parts It is better to use a well-wrung out cloth without abrasive materials. It is not advisable to clean wood with abrasives or wet it with water. The surface of the window sill must be protected from freezing. Dust is removed with a dry cloth, and every 3 to 4 years it is necessary to cover the product with a new layer of varnish, wax or paint.

A new window sill will last you longer if the following conditions are met:

• Accuracy when carrying out work.
• Using quality building materials and raw materials.
• The correct choice of material from which the window sill is made.
• Installation taking into account all instructions and requirements.
• Careful handling and regular care behind the surface.

It follows that the installation of window sills for plastic windows, as well as replacing the window sill with a new one, can be done independently. You only need to follow all the steps in the workflow.

Today we will describe everything technological aspects fastening and sealing of window sills of plastic windows for various options installations. When completing the installation process of PVC windows, the same close attention, as when attaching the frame, and when forming foam seams.

Requirements for preparing the opening

Although the installation of the window sill is carried out at the final stage, the possibility of correct installation depends on timely preparation. There is no universal recipe, because the material and structure of the walls can be completely different, and the window sill itself can have different purposes. However, there are a number of nuances that should be considered in advance.

The most important requirement is the quality of preparation of the lower edge of the opening. Ideally, preparatory plaster is carried out, due to which a smooth surface is formed under the frame. horizontal plane, which serves as the basis for subsequent alignment of the window and support for the window sill. It is important to remember that the window sill never rests directly on the prepared plane. The presence of a warm seam helps to avoid freezing and the resulting formation of condensation in the lower junction.

You will have to work hard on the side edges of the opening. Classic method installation involves inserting the ends of the window sill into the slopes, but the depth of this insertion itself is practically not regulated by anything. Construction practice shows that the optimal depth for covering a window sill with a slope is 30-50 mm. However, if the slope is performed plastic panels, the window sill should protrude 15-20 mm beyond the framing decorative profile. Thus, on the side edges it is necessary to cut two niches at the level of the upper edge of the installation groove.

Correct installation of the window sill is impossible without following the correct installation sequence. Please note that first the frame is secured and the external waterproofing is glued, then the glass unit is installed in place and foam seams are formed. At this stage, the lower plane of the opening should be leveled, hems should be made in the corners, all surfaces should be dust-free and primed, and the internal sealing tape should be glued. Only after these requirements are met is it possible to install a window sill. Finishing of the slopes is carried out at the final stage.

Options for the position and function of the window sill

The installation of a window sill is carried out with some specific differences depending on the purpose of this structural element. There are three most common options:

1. The window sill simply forms the lower junction node.
2. The window sill will be used to install flowerpots and other items.
3. The window sill is designed for operating loads over 30 kg/linear. m.

In almost all the described cases, the window sill also covers the heating device located under the window. If there is none, the window sill has practically zero overhang, that is, it protrudes above the plane of the wall solely by the thickness of the visor. Otherwise, the window sill should completely cover the heating device with an overlap of about 10-15 mm.

If the window sill protrudes above the plane of the wall by more than 2/3 of its own width, its installation is carried out in the same way as for increased operating loads. This method involves placing it under a window slab. support brackets in quantities of at least 2 pieces. per linear m. For fastening these brackets, longitudinal grooves of the “” type are provided on the back side of the window sill. dovetail». Downside The brackets are attached to the wall with plastic dowels, and they are hidden in hems 20-30 mm deep, which are subsequently walled up. The window sill brackets are fastened to the wall using final stage installation after landing on polyurethane foam. IN frame buildings for the purpose of strengthening, the lower edge of the opening can be formed by a wider board, which is supported from below by slopes, but the thickness of the board should not exceed the protrusion of the canopy above the rear plane of the window sill.

Also, the window sill can have one or both open ends, for example, when decorating parapets panoramic windows or balcony blocks. In this case, it is highly desirable that the open corner is supported by at least one bracket, which will prevent the window sill from being undermined upward. To mask the cut edge, you will need an end cap for the entire depth of the window sill.

Marking and trimming

Before you begin attaching the window sill, it needs to be “sized” in accordance with the size of the opening and frame, as well as taking into account the desired amount of protrusion. The window sill is trimmed on three sides - two lateral and one rear, facing the inside of the installation groove. It is most convenient to perform trimming with an electric jigsaw, and in its absence - hand hacksaw with small teeth.

The back side needs to be cut first. If the window is installed correctly and the width of the slopes at the bottom on both sides is the same, this step can be skipped. Otherwise, longitudinal trimming helps to level out installation flaws and ensure that on both sides the window sill protrudes above the wall plane by an equal amount. Please note that the plastic window sill has a cellular structure, which can complicate cutting if there is a vertical jumper on the cutting line. In such cases, it is recommended to slightly increase the projection of the window sill.

Trimming the ends is carried out in such a way that the final length of the window sill is equal to the sum of the length of the visible part of the frame, openings and side projections. To facilitate installation, the rear corners can be cut obliquely so that at the edges the window sill goes deeper into the body of the slope by at least 20 mm and about 30-50 mm in the places of the side projections. When the trimming is completed, decorative caps need to be glued to the ends of the window sill, shortening them if necessary. Before installation, two marks must be made on the rear edge of the window sill, the distance between which is equal to the width of the visible part of the frame, while equal symmetrical indentations should remain on the sides. Thanks to this marking, you can easily align the window sill with horizontal displacement.

Window sill installation

Before fixing the window sill, you need to select support pads, which are usually used as sets of mounting wedges, glued together to prevent displacement. The pads are placed on the lower plane of the opening with a distance of 25-30 mm from the front edge. The thickness of the linings is selected so that the window sill has a slight slope towards the room of the order of 1-1.5°. The installation step of the linings should not be less than 60 cm for window sills with a purely decorative function and not less than 40 cm for increased operating loads.

When everything is ready, the window sill is installed on the supports and pushed with the rear edge until it stops in the installation groove. You can slightly widen the gap in this assembly and fill it with plastic sealant, removing the excess after the window sill is pressed into the groove. Next, you need to select a wide board and place it on top of the window sill so that the longitudinal axis is located strictly along the line of installation of the pads. After this, a pressure of about 15-20 kg is installed on the board. linear meter. In this case, the load must be placed with a slight offset towards you, ensuring that the back of the window sill is pressed tightly against the edge of the installation groove without any gap.

When positioning is completed, foam is injected into the gap between the window sill and the opening. It would not be superfluous to first irrigate the cavity with water from a spray bottle, which will contribute to more active polymerization. First, the deepest part of the gap is foamed, which is filled 100%, so that when the foam expands, it tightly presses the slab to the frame. After this, you need to wait until the filler has completely expanded and partially polymerized, and then check that the installation is correct and that there are no shifts. If everything is in order, the remaining space is filled with foam by approximately 50-70% of the volume, taking into account further active expansion. The gap must be filled in such a way that, after increasing in volume, the foam fills the space between the pads, but does not protrude beyond them, thus forming a groove about 30 mm deep for further sealing.

Repairing gaps

To maintain the integrity of the finish, the cracks under the window sill, notches in the slopes and the places where the brackets are attached must be sealed, bringing the adjacent sections of the wall into a common plane. Polyurethane foam is not suitable for this, in monolithic buildings it's better to use regular cement mortar, in frame - fill the voids with fragments of expanded polystyrene or mineral wool, and then carefully “go around” the window sill with finishing material.

It is better to fill gaps at a stage when preparations for interior decoration. This ensures that the seal is covered by a general preparatory and decorative layer, which will reduce the likelihood of cracks and unevenness. Particular attention should be paid to the gap under the window sill. Although it is almost never visible, a thin gap almost always forms between the plastic and the body of the wall. In this place, it is recommended to select a shallow groove of about 5 mm with a thin scraper, and then fill it with a thin strip of plastic sealant.

When installing plastic windows, installation specialists regularly encounter a situation where customers do not know what a window sill is for - they perceive it as a standard element of the window structure. In fact, a window sill has many functions, depending on which the material for the window sill board is selected. Let's fill the gap in knowledge and tell you about the functionality of the window sill, its types, the advantages and disadvantages of the material from which it is made, as well as how to install the window sill on plastic windows with your own hands.

Initially, the window sill had four functions:

1. prevent the entry of cold air into the room in the area where the window structure connects with the base of the window opening;
2. level the difference between the bottom of the window opening and the frame that is installed on the gaskets;
3. collect condensation when window panes fog up;
4. close visible part walls in the opening.

Over time, the role of the window sill has expanded. He became:

• decorative element in the interior of the room;
• stand for flowers and various figurines;
• table in the kitchen, desk or work table in the nursery, living room, bedroom;

• support when washing windows and hanging curtains;
• a business card of the owners’ wealth;
• a place to watch the street and relax.

Based on how the owners see their window sill, the material from which it is made is selected.

Types of window sill

The construction industry offers a base for the window sill from:

• natural (granite, marble) and artificial (acrylic or quartz based) stone;
• natural wood (oak, cherry, pine, larch);
• composite materials (MDF, chipboard);
• plastic (polyvinyl chloride).

A natural stone

Window sill from natural stone- one of the few interior elements that very clearly demonstrates the wealth in the house, the status and good taste of the owners. Him:

• handsome, respectable appearance, which remains until the end of operation;
• a variety of colors and patterns, which allows you to fit it into any interior;
• the highest strength - granite and marble are among the best minerals on the planet in terms of this indicator (second only to diamond);

• no reaction to external influences in the form of temperature changes (does not burn and is not afraid of frost), high humidity, ultraviolet irradiation (does not fade in the sun);
• has an unlimited service life - in old castles you can find stone window sills with a service life of several centuries;
• easy to clean.

Natural stone also has disadvantages:

• on a surface polished to a mirror finish, despite its high strength, it is quite easy to leave scratches with a sharp object (granite is more resistant to sharp objects);
• marble is afraid of vinegar and acid (this mineral is essentially limestone). Tea and coffee stains are difficult to wash off;
• both minerals accumulate radioactive radiation - it is better to avoid them in radiation-contaminated areas;
• high level of thermal conductivity (granite - 3.5 W/(m x deg), marble - 2.9);
• limited dimensions (a large slab is difficult to polish, transport and install);
• in case of accidental damage (chip, crack), it cannot be restored;
• heavy weight - the window sill-tabletop is in most cases supplied by tap through the window;
• limited quantity color palette in granite (in fairness, we note that the natural pattern of the material is fantastic);
• high cost of the product.

Fake diamond

An alternative to a marble or granite window sill is an artificial stone made from acrylic or quartz agglomerate. The product has a lot of advantages:

• light weight - easier to transport and secure;
• there are no restrictions in size - thickness and width;
• high strength - higher than that of PVC and wood window sills, but lower than that of natural stone;
• long service life;
• by adding various components to the mixture, you can get unique colors and patterns that imitate various natural materials;
• is not afraid of moisture, is easy to clean from dirt, does not absorb odors;
• feels warm to the touch natural wood;
• Can be restored using glue, heat treatment and grinding.

Flaws artificial stone related to its nature:

• afraid of high temperatures - traces of cigarettes and hot dishes remain on the surface;
• is destroyed when interacting with aggressive chemicals;
• is easily scratched and abraded (it is afraid of abrasive materials), which is clearly visible on polished plain surfaces, especially on black, chocolate and dark gray backgrounds;
• high cost, in some cases exceeding the cost of natural stone.

For information: the above damage can be easily removed by specialists on site, without dismantling the window sill. But it costs money.

Tree

Like granite and marble, wood is a natural materials and has the same centuries-old history of use in window construction. With the advent of the construction industry on the market artificial materials, positions wooden window sills fell sharply, but still retained their fans and connoisseurs.

Wooden window sills have their pros and cons.

• environmental purity of natural material;
• durability during operation - do not break like natural stone, are not afraid of hot objects like plastic or acrylic board;
• high level of thermal insulation;
• beautiful color and original texture: the surface can be made glossy under modern styles interior design, or give the look of old wood - a country look;
• high strength - can withstand the weight of a person and flower pots;
• natural warmth both during direct contact and visual inspection.

• is afraid of direct contact with water and wet rooms - the surface swollen with water is deformed, so such a window sill must be either painted or varnished;
• constant care is required: first of all, regular and timely repainting;
• does not tolerate close contact with batteries central heating(deformed) - if there is not enough distance from a constant heat source to the window frame, it is better to abandon the wooden window sill.

Experts do not have a consensus on the price factor: some consider it a plus due to the affordable price, others consider it a minus, due, on the contrary, to the very high cost of wooden window sills. Here, oddly enough, both sides are right. A pine window sill board is not too different in cost from plastic, while an oak board costs about the same as natural stone.

Composite materials

Composites - chipboard and MDF - are intended to replace natural wood. However, alternative window sills are greatly inferior not only to wooden ones, which they are intended to replace, but also to all other types of window sills. The main problem is their ability to swell when in contact with water.

Protection of wood-based material with waterproof film is not very reliable. The film is easily damaged by sharp objects and is afraid high temperatures. In this regard, laminated MDF is more reliable material, but also costs more.

Polyvinyl chloride

A plastic window sill is a hollow panel with a thickness of at least 2.0 cm made of two thin sheets (the upper one is at least 3 mm thick, the lower one is at least 2.5 mm thick), connected by stiffening ribs. The more ribs or thicker the sheets, the stronger the product.

Installing a plastic window sill allows you to:

• save money - its price is lower than the cost of natural and artificial stone, as well as wood;

• synchronize the service life of the window sill board with the plastic window;
• get a window element of various designs that fits into any interior, including wood or natural stone;
• ensure good thermal insulation between the frame and the lower base of the window opening;
• produce everything installation work on one's own.

Among the disadvantages of PVC window sills it is necessary to note:

• fear of high temperatures - traces of cigarettes and hot pots remain;
• low strength.

At correct operation these deficiencies, as a rule, do not appear.

Please note that all types of window sills can be installed independently. Using an example of how to install a plastic window sill with your own hands, let’s look at general principle organization of work and describe the entire technology step by step, noting at the end the nuances of fastening this window element from other materials.

Materials and tools

Efficiency construction process depends on correct selection materials and necessary tools. To install a window sill in one window you will need:

• window sill material;
• polyurethane foam - poured between the window sill canvas and the wall of the house;
• silicone-based plastic sealant - seals the joints between the window sill, window frame and slope panel;
• perforated metal strip and self-tapping screws if additional fastening of the window sill is planned;
• putty for sealing grooves in the wall;
• plugs for the ends of the window sill;
• wedges made of wood or plastic for the window sill (3 pieces per window).

Tools needed:

• roulette;
• putty knife;
• mallet or rubber mallet;
• a hammer drill for making a groove in the wall under the window sill;
• one of the following tools for cutting plastic profiles. These can be: grinder - cuts quickly, accurately, with smooth edges along the cutting line; jigsaw with metal file as cutting tool; a hacksaw - almost every home has one;
• building level;
• spray foam gun;
• builder's pencil or marker;
• screwdriver or Phillips screwdriver;
• construction (stationery) knife with a retractable blade;
• clean rags.

Preparatory work

Before installing the window sill, it is necessary to carry out a number of preparatory work:

• take measurements of the window opening to determine the size of the window sill board;
• select the window sill panel;
• make grooves in the wall;
• clean the base of the window opening from debris;
• cut the window sill to size.

Window opening measurements

Quality installed window sill determined by several parameters. Among them, an important place is occupied by the accuracy of the measurements taken and the calculation of the dimensions of the window sill based on them. In the case of a plastic slab, bringing the window sill to size is done at home.

Other types of window sills are ordered ready-made. Therefore, errors in calculations, if they are made in a smaller direction, cannot be corrected. At large sizes you will have to enlarge the grooves and install brackets for additional support window sill.

The measurement is carried out in the following order:

1. The distance from the frame to the edge of the wall on both sides of the window is measured, i.e. The depth of the window opening is measured. To determine the actual width of the window sill, 2 cm is added to the result obtained to go under window design and 4-6 cm for going beyond the wall into the room.

On many sites you can find a recommendation to extend 10 cm beyond the wall. Here, only the aesthetic perception of the window sill is taken into account. In technological terms, a large protrusion interferes with warm air flows from heating radiators to spread throughout the room (air convention is violated);

2. The distance between the walls next to the window is measured (line B in the figure), and then the length of the edge of the wall at the base of the window opening if the slopes are not made at right angles (line C in the figure).

To the results obtained, 2-3 cm is added on each side so that the window sill board fits into the grooves on the wall (stone and wood are hidden in the slopes by 1.5-2 cm). In addition, 3-5 cm are added to the eyes.

Selecting a window sill panel

• The plastic window sill has standard dimensions:
• length 6 m;

width from 20 cm to 100 cm, with increments of increasing size by 5 cm to a width of 60 cm and 10 cm further. Therefore the choice required size

1. does not present any difficulties - the excess can always be cut off. More difficulties arise when choosing a specific plastic model. Here you need to follow the advice of experts.
2. Buy a window sill board with an allowance in size.
3. Do not skimp on material - cheap plastic has low strength (fragile) and fades in the sun. Take a PVC panel of the same color as the window, unless design solution
4. in the interior, where the window sill can be under natural materials.
5. The stiffening ribs should not be positioned vertically, but at an angle, in the form of saw teeth - the panel has higher strength.
6. Scratches and abrasions are less noticeable on white.
7. The distance between the stiffeners should not exceed 35 mm.

Study the certificate. It is necessary to pay attention to the percentage of polyvinyl chloride (the norm is about 60%) and chalk - no more than 5%.

Grooves are knocked out

The window sill board should extend 2-3 cm inside the slope. To do this, at the level of the base of the window opening, a groove measuring 50x50 mm is knocked out in the wall with a puncher. If you don’t have such a tool at hand, you can select a recess in the brick using a hammer and chisel.

If the slope is concrete, use a grinder with a special cutting wheel to make 2-3 cuts in the place where the groove will be. To avoid accidentally damaging the frame, a spatula is pressed tightly against it. It is easier to knock out cut concrete than monolithic one.

Preparing the base of the wall The polyurethane foam must come into direct contact with. Therefore, the base of the opening is cleared of construction debris and foam that has excessively protruded when foaming the space between the frame and the walls. The foam is also cut out from under the lower window profile to a depth of 2-3 cm to partially pinch the window sill fabric by the window structure.

If the distance between the lower plane of the installed window sill and the base of the wall is less than 1 cm, a recess up to 70 mm wide and 20-30 mm deep is cut into the wall to form a foam seam on which the plastic panel will lie.

Preparing the plastic panel

Plastic window sill for sale rectangular shape. You need to insert a panel in the shape of the letter “T” with a wide leg (often placed in the shape of a rectangle or trapezoid). Therefore, the dimensions of the real window sill are transferred to the plastic and the cutting lines are drawn with a construction pencil. The required shape is cut along the lines.

Important: when installing windows, very often they shift along the vertical axis, when the distance from the edge of the wall to the frame is different on different slopes. In these cases, the rear side of the panel is cut obliquely so that a parallel is maintained between the wall and the window sill protrusion.

Window sill installation

Instructions on how to properly install a window sill on plastic windows are simple and easy to understand for beginners in the construction business. Let's look at all the operations step by step.

Step 1. The protective film is removed from the bottom side of the window sill, as well as from the sides at a distance of 3-4 cm.

Step 2. The window sill is tried on and inserted into the place of permanent fixation. If an undercut area is discovered, the inaccuracy is corrected.

Step 3. A vapor barrier tape is attached under the frame.

Step 4. Pre-purchased wedges (bars) are installed. There are several important points to consider here:

• The minimum width of the bars is 5.0 cm;
• The length of the wedge should be less than the width of the panel, but no more than 10.0 cm, and the block should not protrude beyond the wall;
• The ideal distance between the bars is 40.0-50.0 cm. This rule does not apply to narrow window openings of Soviet-built houses - at least three bars must be placed under the window sill for one window;
• Under the wedges, the wall surface is leveled or plaster mortar or putty;
• Using a level, all supports are brought into one plane. In addition, the length of the block is aligned horizontally.

Step 5. A protective film 3-4 cm wide is removed from the surface of the plastic on the window side. Plugs are placed at the ends.

Step 6. The final test fitting is carried out, during which the following tasks are solved:

• a tight fit of the window sill panel to the frame is ensured - if necessary, the bars are additionally adjusted;
• the slope of the window sill board towards the room is ensured by 2-3 mm for every 20 cm of window sill width - necessary for condensate drainage.

Step 7 The installation seam is foamed onto the base of the opening.

Step 8 After the foam reaches the “touch-dry” state, a window sill is installed. Using a rubber hammer, he sits in a permanent place.

Step 9 The level once again checks the plane of the window sill. If necessary, adjustments are made - another gasket is installed (fourth) or the existing ones are adjusted.

Step 10 A small weight is placed on the window sill board closer to the room - in this way, a tight fit of the window sill to the frame is achieved due to the expanding foam.

Step 11 After half an hour, an additional 10 kg of weight is placed on the windowsill, after which the remaining space can be foamed.

Step 12 The grooves are sealed with putty, after which the slopes can be sheathed with plastic panels.

Step 13 The joints of the window sill with the slope panels and the frame are sealed with plastic sealant - silicone.

Step 14 After a day, the load is removed and the protective film is removed.

Now you can install plugs at the ends, and protective film take off.

For information: on balconies and loggias, window sills are installed using the same algorithm.

The nuances of installing window sills from other materials

How to attach a window sill to a plastic window made of other materials? Window sill boards made of natural and artificial stone must be attached with glue. To do this, the base of the window opening is leveled cement-sand mortar. The ends of the stone are protected with felt.

A wooden window sill can be installed in various ways:

• by pressing method - under the frame;
• on wedges;
• on glue;
• on the brackets.

Conclusion

On sale you can choose a window sill to suit every taste and at any price:

• made of natural stone (granite, marble);
• artificial stone (acrylic, quartz agglomerate);
• wood;
• Chipboard, MDF;
• plastic.

Installation instructions are simple. Provides the following types works:

1. measurements of the window opening are taken;
2. a panel is purchased and then cut to size;
3. grooves are knocked out in the wall;
4. the base is cleared of debris;
5. wedges are placed;
6. the window sill plane is installed in accordance with the requirements of technological regulations;
7. the window sill board is secured with mounting foam;
8. the grooves are sealed with putty, the slopes are sewn up with plastic panels.

For balcony windows, installation of window sills is carried out according to the same scheme.

Often when conducting overhaul The old windows in the room have to be replaced. However, window installation cannot be considered complete without exterior finishing, We will talk about how they install and stand) in this material.

Common installation methods

There are several solutions that allow you to find the answer to the question of how to install a window sill with your own hands:

1. The structure can be fixed using an adhesive composition. This is enough old way, which is extremely rarely used by craftsmen today due to the emergence of more reliable options.
2. One of the most simple solutions- use of self-tapping screws. The fasteners are screwed into pre-prepared holes in the window sill. The use of special pads and polyurethane foam makes it possible to add rigidity to the structure.
3. The next method involves using spring metal brackets as fasteners. The latter are screwed to the window sill profile using the same self-tapping screws.
4. And finally, the last method is to seal the space under the window sill with pads until the edges of the plane enter under the window frame, achieving higher level density.

Tools and materials

How to install a plastic window sill with your own hands in the most basic way? To do this you may need the following tools:

• building level;
• screwdriver;
• gun for laying polyurethane foam;
• perforator;
• jigsaw;
• pencil;
• roulette.

Preparatory activities

First of all, you should prepare the above tools, which will definitely come in handy during the work process. Next you need to make correct measurements. The aesthetic appearance of the installed window sill and its reliability directly depend on this.

When taking measurements, it is important to take into account not only the parameters of the installed canvas, but also whole list additional characteristics. The location of the existing radiator deserves special attention here. If the latter is installed high enough, the presence of free space of a few centimeters to the lower edge of the window sill can lead to disruption of air circulation in the room and deterioration of the microclimate.

When taking measurements, it should be taken into account that the length of the window sill should be greater than the space of the window opening. The width of the product can be chosen arbitrarily, depending on personal convenience and needs. A convenient option would be a window sill that protrudes from the wall at a distance not exceeding 8-10 cm.

Window sill trimming

So, let's look further at how to properly install a window sill. Sometimes during installation it is necessary to trim the product so that it matches the parameters of the window opening. The largest window sills reach a length of 3 m or more. The width of the structure can be from 25 to 70 cm.

If the window sill is too large, extra material can be cut off from the side where it is attached to the wall. Particular attention should be paid here to the cutting line. It must pass without touching the stiffening ribs, which are located inside the window sill. Thus, the structure does not deform during operation and will be securely connected to the frame.

To trim the window sill, it is recommended to use electric jigsaw. It is allowed to use a small hacksaw for wood or plastic, depending on the material of the structure. The work should be done slowly, which will avoid chips and scratches on the front surface of the window sill.

When sawing products, do not forget about safety. Since broken pieces of material can get into your eyes, it is recommended that you wear assembly glasses. To protect your hands, you should use gloves or work gloves.

How to install a plastic window sill: basic steps

Installation of plastic window sills is quite simple:

1. First, the surfaces are thoroughly cleaned. Pollution is eliminated and garbage is removed.
2. Having used it, you must determine the horizontal position of the structure and set the beacons. Typically, when installing window sills, their plane is tilted down by about 5 mm. This solution allows the formed condensate to drain from the plane.
3. How to install window sills on plastic windows? The structure sits on a special glue or building mixture. As an alternative solution, you can resort to fixing the plane with screws on mechanical supports.
4. At the next stage free space between concrete slab and the window sill is filled with polyurethane foam. Excesses protruding outwards are carefully removed using a stationery knife.
5. Finally, special plugs are installed on the end edges. The surface of the window sill is removed from the protective film.

How to install window sills on plastic windows correctly? To do this, there should be a free distance of approximately 6-7 cm between the heating radiator and the lower edge of the product plane. Only in this case warm air will rise freely from the battery, drying the double-glazed windows and slopes.

How to install a wooden window sill?

Installation is much more difficult. Before you start working, you should pay attention to the quality of the source material. The window sill board should not contain obvious flaws in the form of chips, knots, or other defects. Moreover, you should use a well-dried board. Otherwise, the latter may crack during operation under the influence of sudden temperature changes and changes in humidity levels.

How to install a window sill in this case:

1. The existing base is planed on all sides, after which teardrops are created on its back surface. The latter are small gutters 5-6 mm deep and 7-8 mm wide.
2. A felt lining impregnated with antiseptics is placed on the back surface of the board.
3. The prepared window sill is inserted into the openings in the wall. The teardroppers are installed on pre-prepared wooden blocks. Structural elements are fastened with nails.
4. The edges of the structure are strengthened with gypsum mortar.

Craftsmen who are well versed in how to install a wooden window sill recommend making a fairly impressive slope into the room, which should be about 20 mm. This avoids the accumulation of condensation on the surface of the product and prevents rotting of the material.

Installation of slopes

Upon completion of the installation of the window sill, slopes should be made. First of all, you need to resort to aligning the window opening vertically and horizontally. The easiest way to cope with the task is to use polyurethane foam. The latter will serve as good protection for slopes from freezing.

Surfaces can be reinforced with mounting mesh or plasterboard. The main task is to maximize the alignment of the planes, as well as the formation of a smooth texture. The top of the slopes can be coated with paint, choosing the color based on the features of the interior solutions.

If the edge of the window sill protrudes into the room by 10 cm or more in relation to the edge of the wall, it is recommended to strengthen the structure. For these purposes, it is worth resorting to using metal corners. But even when implementing such a solution, you should not overload the edges of the window sill during operation, as this may cause deformation of the plane.

Particular attention should be paid to the conditions for installing the window sill on the balcony. In order for the surfaces to “grab” firmly, it is advisable to maintain the air temperature in the range from +16 to +20 o C for several days.

When installing a window sill, it is recommended to apply a lot of polyurethane foam at the ends and in the middle part of the product. To strengthen the structure, it is allowed to use silicone sealants and glue.

Eventually

As you can see, installing a window sill with your own hands is a completely doable task. The main thing is to approach the work carefully and not miss moments that may negatively affect the subsequent operation of the structure.

The attractiveness of the external design of the window opening depends on the installation of window sills. Failure to install them will not only make the room look unkempt, but will also create some inconvenience. In particular, the homeowner will have to regularly eliminate condensation leaks formed on the windows. Otherwise, annual finishing and renewal of surfaces will be required.

Installing a PVC window sill is a relatively simple process if you have basic knowledge about the construction and repair process, as well as certain practical skills. Plastic window sills are now quite popular: they do not need to be painted, they are available in widths up to 60 centimeters, which allows them to be installed on any wall thickness. In addition, they are best combined with the most popular windows today - plastic.

Taking measurements and choosing a window sill

Before proceeding directly to the installation process, you need to take measurements, and do them correctly, because both the appearance of the window sill and its functionality directly depend on this.

First of all, measure the width of the window and add 10 cm to it. This will be the length of our window sill. Now we measure the distance from the corner of the wall to the window, that is, the thickness of the wall to the window.

We add 5 cm to the result obtained during the measurement process. If the protrusion is larger, it will disrupt proper air circulation and your windows will systematically fog up.

Window sill installation

Now, all the measurements have been completed, the window sill has been selected, and you can begin the installation process. Installed on the bottom of all plastic windows special profile, to which the ebb is attached from the outside. We will place the window sill against the same profile from the inside of the room. We measure and cut out the window sill of the required width and length. When measuring the width, do not forget to allow 5 cm for the protrusion, as well as 1 cm, which will go under the window frame.

Now we try on the window sill; if anything interferes with its free installation, for example, uneven slopes, we eliminate the obstacle using a hammer drill. Cleans the surface of the wall from dust, debris and dirt, then selects wedges under the window sill using trimmings. You can rent a vacuum cleaner with a wall chaser on etools.by – see the website page.

The window sill should fit tightly to the frame, but the main thing here is not to overdo it, otherwise the window sill will be deformed.

The window sill should lie as horizontally as possible, and its front edge should be lowered three degrees relative to the window frame. As soon as the wedges on which the window sill will be installed are selected along the entire length of the frame, you need to secure them with plaster so that they do not “walk” during the installation process.

Now remove the window sill, wet the wall and apply a lime-gypsum mortar. The layer of mortar should be 1.5 cm above the level of the wedges; we mount the window sill on it, pressing it tightly so that the window sill “sits” on the wedges. In this case, the excess solution is removed flush with the wall and rubbed down.

If you install the window sill on polyurethane foam, do not overdo it., because the foam expands greatly during use and can move the window sill from its place, then the whole process will have to start all over again. Install and secure the window sill using spacers. Fill the voids with foam. After it has completely dried, remove the spacers and cut off excess foam. Be sure to check the quality of the installation with a level; if something does not work out, use a hacksaw to remove the mounting foam and repeat the whole process from the beginning.

Plastic window sills can also be attached using special brackets, but this method is used quite rarely. This fastening is used only if the width of the window sill exceeds its length.

We fill all the gaps between the frame, slopes and window sill with acrylic; it will protect the window sill from moisture penetration and prevent cracks from appearing.

The installation process of the plastic window sill is completed. As you can see, there is nothing complicated about it, but you should always take into account the element of chance, if something goes wrong, then doing it all over again can be much more difficult and expensive.

Video instructions for installing a window sill