Vapor barrier tape and its types. Vapor barrier tape for windows: technical characteristics Installation of vapor barrier tape on PVC windows

It can improve the quality characteristics of the structure, which extends its service life. On sale you can find tapes that have an adhesive strip on one or both sides. It is designed to fix the tape to the window and wall. Among other things, such materials are classified according to temperature characteristics during operation.

The first variety is suitable for the summer period and can be used at temperatures ranging from +5 to +35 ° C, while products intended for winter can withstand temperatures below zero degrees. The width of such a strip can vary depending on the tasks, which allows it to provide vapor barrier to seams different sizes. When choosing a vapor barrier tape, you must take into account that its width should be 45 mm larger assembly seam.

general description

The described outdoor installation tapes may consist of foam materials and are required for and may be used in conjunction with plaster mortar, which increases vapor barrier characteristics. There is a vapor barrier tape for windows on sale, the characteristics, photos of which are presented in the article. This material may be based on butyl rubber, which is intended for sealing joints and installation on windows and windows. The product consists of non-woven fabric, during installation it is primed, at the next stage it is covered with plaster, and at the final stage it is painted. This type has a self-adhesive layer. If you need a vapor barrier tape that will be used at high humidity, then you should install the material under the dry finishing of the slopes, using the metallized variety.

Characteristics of foil vapor barrier tape

Foil hydro-steam and thermal insulation tape is glued to clean, dry and pre-degreased surfaces. The material itself is supplied in boxes whose dimensions are 420x420x600 mm. It should not be used at temperatures below +10°C. The tapes are based on polyethylene foam, which is laminated and metalized with polypropylene film on one side, while on the other there is a waterproof adhesive layer that reliably ensures fastening of the material to concrete, brick, metal, plastic and wooden structures.

It is based on a material that consists of a closed cellular structure; it has low hygroscopicity and almost does not absorb moisture. Elasticity is ensured thanks to polyethylene foam, which guarantees sealing of seams with varying degrees of unevenness. High mechanical strength was achieved thanks to the presence of polypropylene film, which is resistant to alkalis, organic solvents and acids. The reflective layer is protected from mechanical damage and oxidation. The sticky layer consists of a water-resistant adhesive, which is created on the basis of synthetic rubber. It has improved adhesion properties different materials, which allows you to use the tape without preliminary surface preparation.

For reference

You don’t have to worry about the vapor barrier tape sticking together in the roll, since there is a protective siliconized layer on its surface. This type of steam-hydro-thermal insulation is used for seams, assemblies and connections of various building structures, including when installing window blocks, wood products, metal, plastic and concrete.

Material sizes

The film thickness is 20 microns, while the length is 15 m, and the width can vary from 90 to 200 mm. Intermediate values ​​are 120 and 150 mm.

Specifications

Vapor barrier tape for windows has a high coefficient of thermal reflection, which reaches 95%. The thermal conductivity coefficient is very small, and at 20°C it is in the range of 0.038-0.051 W/m °C. The heat absorption coefficient during the day reaches 0.48 W/(m 2 °C). Thermal resistance equals 0.031 °C/W, which is true for one millimeter of thickness. Professionals are sometimes also interested in such a characteristic as specific heat capacity. In the case of the one described, this parameter is 1.95 kJ/kg °C.

Under a load within 2-5 kPa, the dynamic modulus of elasticity can vary from 0.26 to 0.6 MPa. Vapor barrier tape for windows has another significant advantage, which is expressed in the ability to absorb extraneous noise. Thus, the sound absorption is 32 dB. The material belongs to the flammability group G2, smoke-forming ability - D3. The density of the material can be equal to 50 and 80 kg/m3.

Features of installing sealing tape

Vapor barrier tape for windows, the technical characteristics of which were presented above, must be installed according to the algorithm developed for this material. For internal sealing of the seam, a duplicated vapor barrier tape based on aluminum foil is used. For reliable and easy fixation, there are adhesive strips on it, which are located on both sides. The tape should be installed around the entire perimeter of the window, and then covered with slopes that are installed using a dry method.

To install the internal vapor barrier tape at the first stage, it should be cut into separate pieces, the length of which will be equal to the width and length of the window. To these values ​​you need to add 10 cm, which will go to the corner joints. The length of the tape is joined with an overlap, the width of which should be approximately 1/2 the width of the material.

Work methodology

Vapor barrier tape for PVC windows, the use of which is described in detail in the article, at the next stage is freed from the protective paper on the side of the duplicated strip. Now the material can be glued to the frame profile. This must be done under tension, and the inner edge of the adhesive layer must coincide with the inner edge of the frame. The protective layer that is on the butyl rubber coating should not be removed at this stage.

To ensure that the adhesion of the adhesive strips is not reduced, the structure must be kept open for a shorter period of time, and before gluing, the surface of the window must be wiped with a soft rag or paper napkin.

Conclusion

Vapor barrier tape for windows, the density of which was mentioned above, should be installed in one piece, with breaks at flat surfaces there shouldn't be. On final stage you need to install the tape on the window sill, and then assemble the window with sashes.

To protect installation seams in window openings from moisture, use vapor barrier tape. It is made from butyl rubber or aluminum. This material glued to damp mounting foam at the seams, extending the life of the windows.

When installing a window in an opening, remember that its service life is related to how competent the installation is. Even the highest quality structures will not be used long time if the installation was performed incorrectly. Due to improper work, moisture will gradually penetrate the walls, leading to the destruction of building materials and the spread of mold.

Vapor barrier tape

When installing the frame, consider several important points:

• WITH inside make the room denser mounting solution(for example, foam).
• To ensure high-quality sealing of all gaps, we use three-layer protection - the outer material protects from the effects of precipitation, the middle layer is responsible for thermal insulation, and the coating inner surface- for vapor barrier.

Vapor barrier provides reliable protection thermal insulation layer against condensation, which is present not only in the bathroom, but also in normal room. In the process of finishing the window slopes, we glue a special tape. The principle of vapor barrier is based on blocking the contact of moisture with polyurethane foam, forming the average protective layer. Materials with low elasticity and air and water permeability are suitable for these purposes. When installing windows, you cannot save on vapor barriers. Such neglect will lead to rapid wear of frames, plaster and finishing materials.

To protect the seam, special vapor barrier tapes are usually used. They come in a coiled and compressed sponge-like material. Absorbing moisture, the material swells, sealing all existing cracks. Vapor barrier tape for plastic windows has a number of advantages:

1. 1. isolates moisture;
2. 2. It is consumed economically, with virtually no waste;
3. 3. does not emit toxic substances;
4. 4. Easy to stick;
5. 5. has a long service life.

2 Classification - what characteristics to pay attention to

Moisture insulation tapes are available with one or two strips of adhesive. The second option allows you to process the window-wall joint more efficiently. The material is classified according to periods of use:

• summer (air temperature – 5-40 °C);
• winter (temperature below 5 °C).

Depending on the nature of the surface being treated, the tapes are produced in various sizes, making it possible to isolate any seams. When choosing a material, keep in mind that it must exceed the width of the gap by 4.5 cm. Tapes made of foam materials are suitable for working on the outside of the building, which will ensure reliable sealing.

Moisture Insulation Tape

Adhesive finishing material, made of butyl rubber, is intended for processing window, balcony, door frames and connections between panels. There is a non-woven layer inside it. After gluing, such a strip is primed, plastered, wallpapered or painted. There is a full-butyl vapor barrier tape made using the Robiband system. It provides better processing of the assembly seam.

Metallized vapor barrier material used for gluing seams with joints in rooms with high air humidity - bathrooms, baths, saunas. A layer of glue over the entire surface in this form greatly simplifies the work process. Manufacturers produce metallized tape of different widths. When selecting material, add 45 mm to the seam width.

The tape, which has a protective strip of polypropylene, withstands mechanical stress well. In addition, it does not react with acids, organic solvents and alkalis.

3 We understand the variety of types of tapes - VS or GPL?

First on the list is PSUL (pre-compressed self-expanding sealing tape). It ensures a high-quality fit of the window frame or door frame to the wall. This tape is used for vapor barrier of external joints and seams.

The next material is vapor barrier BC. It is used for sealing seams when dry finishing is performed. For example, under sandwich panels, drywall, plastic surfaces And so on. The tape has a layer of adhesive across its entire width - this property greatly simplifies the installation process. There is an improved version - BC+. It is supplemented with anti-adhesive film. This additional coating ensures strong adhesion of the insulation to building materials.

Robiband tape VM for vapor barrier

Robiband tape VM for vapor barrier is the next high-quality material option for processing seams. It is used for interior work, and a wet plaster solution is applied on top. Vapor barrier VM+ is a more complicated option with better performance characteristics.

The last type is GPL (hydro-vapor barrier material). It is made from high quality foamed polyethylene. The tape has one laminated side, as well as an additional metallized layer. Its second surface is completely covered with glue. This tape is universal, that is, it can be used for all types of work. Its variety is GPL-S tape, which has similar characteristics.

4 How to glue insulation - we work without errors

Vapor barrier material not only provides protection from moisture, but also has an alternative property when applied correctly - sound absorption. Vapor barrier tape is applied to the seams in one piece; there should be no breaks. Before starting work, measure the length of the surfaces to be treated.

The pasting process consists of several steps:

1. 1. Clean the window opening from dirt, dust and debris.
2. 2. Before installation, remove the PVC window and wipe with a dry cloth.
3. 3. Place the structure in place and mark on the frame and wall where the tape is attached.
4. 4. The tape is attached to the window frame before applying foam along the seam.
5. 5. Take out the structure and stick a vapor barrier on its surface around the perimeter.
6. 6. Before replacing the window, remove the remaining protective film from the adhesive surface.
7. 7. When gluing the material, do not allow wrinkles to form. This defect will allow drops of liquid to pass under the vapor barrier, impairing performance.

In order for a window structure to last long enough, its installation must be carried out in strict compliance with existing technology. External material for steam, heat and water insulation must be glued after the polyurethane foam has completely polymerized. We process the seam under the window sill last.

If the tape is glued under a layer of plaster, then it must have a special layer that will ensure strong adhesion to the building material. The uneven joint between the wall and the window frame is covered with a stripping, and a vapor barrier is glued onto it. The use of building materials for wall decoration is permissible only if the requirements for water permeability are fully met.

If metallized tape is used for vapor barrier, then additional reinforcement may be required when applied to a rough surface. To enhance the adhesive effect, use self-adhesive tape with one or two strips of glue. It is additionally used to process vapor barrier joints, eliminating and smoothing out defects (places of peeling and wrinkling) formed during the work process.

Question about the need for vapor barrier of windows by gluing the joints of window frames and slope outer wall vapor barrier tape has no clear answer. But having decided to install plastic windows in your house, it is very useful to understand some aspects of the problem:

The use of vapor barrier tapes increases the cost of installation. But it is not a fact that high-quality installation will be achieved by applying tape. Preparation of the base for the tape is very important, and the sticker technology has subtleties. Installation violations lead to the fact that the tape simply comes off and ceases to perform its task of vapor barrier. In addition, the unevenness of the opening makes it difficult to install the tape, and high-quality preparation is not always done.

One of the opinions of experts is that with optimal organization of heating and air exchange in the house, windows do not produce condensation or mold in the corners. The dew point is located on the outside of the insulating wall layer, and there cannot be any mold in the window corners. It does not matter whether the windows are sealed with PSUL and a membrane or not. But if there are problems with the ventilation hood and the heating in the house is not working well, then vapor barrier of the windows will have a positive effect (although the problems of heating and ventilation need to be solved comprehensively). In any case, if a company providing services for installing PVC windows stipulates the conditions for their future use by the customer and offers options for sealing joints, this is definitely a plus for the company. Because there are “companies” and employees who “don’t like” the abbreviations PSUL and argue that they don’t spare foam, and the window is guaranteed for a whole year. Unfortunately, the installation is not always successful and in the second winter there is no blowing from the cracks of the windows, and in the off-season there is no condensation along the slopes.

The seams between window frames and external walls are one of the weakest links and require careful hydro- and thermal insulation. Polyurethane foam, filling the space between the opening and the frame, perfectly insulates from air noise and performs the task of thermal insulation of the joint. But moisture and ultraviolet radiation can destroy foam in a period of several months to two years. They solve this problem by protecting the foamed joint with sealing. Waterproofing is carried out on the outside so that atmospheric moisture does not fall on the porous insulation; from the inside of the room, the joint is taped with vapor barrier tape.

Vapor barrier is necessary to prevent moisture from the outside air from penetrating into the heat. insulation materials junction. According to standards, internal seams for PVC windows must have a vapor permeability of no more than 0.01 mg/m*h*Pa. The vapor barrier is installed before installing the windows, sealing the joint from the inside: the window block is installed in the opening without fixing, areas for sticking tapes are marked, then the block is removed and vapor barrier tapes are glued.

Means for protecting the joints of windows and balcony doors:

• Silicone sealants
• Insulation with padding - cords, tow, moss
• Foil tapes
• PSUL tapes and butyl rubber tapes

For the right choice It is important to consider the type of window finish and the position of the joint. To protect the joints of frames and plasterboard and plastic slopes (dry cladding) and to protect windows with plastered slopes, use different means isolation. For wooden windows installed in log houses, natural fillers are usually used - sphagnum, jute, flax tow and so on.

Vapor barrier device

There are three layers:

1. From the inside - thermal protection prevents heat loss from the room to the street
2. The middle load-bearing insulating layer provides thermal insulation and sound insulation. These problems are solved by polyurethane foam or other porous material. It is rational to include vapor barrier self-adhesive tapes in this inner layer, if the window unit is mounted in wet areas– kitchens, baths or showers
3. The outer layer waterproofs the joint and protects against the penetration of cold street air

Vapor barrier tapes are available with a one-sided adhesive layer and double-sided. A one-sided sticker is used if the lena is mounted on lateral surface window frame. Double-sided tape gives an advantage in choosing fasteners: on the frame or in window opening. By climatic versions tapes are also produced in two types - for areas with low winter temperatures – winter option tape, and for areas where temperatures do not fall below +5⁰С - a summer option.

The base for the adhesive layers of the tapes is butyl rubber or metal.

Main types of vapor barrier tapes:

• PSUL, or pre-compressed sealing tape, is used for finishing and vapor barrier of external joints, ensuring a tight connection between the window frame and the external wall. The base material is butyl rubber, the thickness and elasticity of the tapes provide good insulation.
• BC - vapor barrier tapes for sealing joints for dry finishing of slopes - made of plastic or plasterboard. sizing with BC tapes reduces the risk of condensation.
• VM - vapor barrier tapes attached to window frame, with overlap, in order to improve the thermal insulation of joints.
• GPL is a polyethylene foam tape, laminated on one side, with metal strips and an adhesive layer over the entire width.

In addition to the main layer of non-crosslinked polyethylene foam, which has a thickness of 2 mm and is waterproofing, GPL tape has a second layer - both vapor barrier and protective. The thickness of the outer layer is only 20 microns, the material is polypropylene.

GPL tapes are used for all types of door and window blocks as universal ones. They combine two tasks - waterproofing and vapor barrier. The structure of foamed polyethylene is elastic and closed-porous, so the material does not absorb moisture and its hygroscopicity is almost zero. The tapes are flexible and suitable for mounting on uneven surfaces. Metal lamination and the quality of the main polymer (polypropylene as a protective layer) determine chemical resistance in both acidic and alkaline environments, and as a result, good durability of GPL tapes.

They produce GPL tapes in standard width sizes of window and door units, width 9; 12; 15; and 20 cm, in rolls of 15 m.

Features of installation of vapor barrier tapes

• The minimum temperature for installing tapes is +10⁰С
• The tapes are applied to the prepared surface - complete cleaning of all contaminants, dust removal and degreasing. Preparation is extremely important for proper operation vapor barriers
• Marking lines for attaching vapor barrier tapes. Determine the position of the frame in the opening without fixing, mark the lines for sticking the tapes, then remove the frame and install the tape according to the markings
• Protective paper strips are removed from the tapes immediately before the final installation of the frames
• After gluing the tapes, the joint is filled with foam
• The tapes under the window sills are installed last
• If wet plaster is planned over the vapor barrier tape, then outer side The tape must ensure adhesion to the solution. From the range of vapor barrier tapes it is possible to choose a material with the desired properties
• Glue the tapes along the perimeter of the frames without breaks, in continuous stripes. There is no need to overlap or overlap the tapes; at joints, use adhesives recommended by the manufacturers or tape

The issue of the need to vapor barrier windows is decided by each owner, based on the specific operating conditions of the windows. Budget options for installing tape are absolutely excluded. But many experts believe that vapor barrier of windows is not reinsurance, but a real opportunity to increase the service life window systems and improve the indoor microclimate, and savings in in this case- not entirely correct approach.

Salute, readers!

I love thematic forums, where everyone has their own opinion and teaches others.

What battles sometimes flare up there!

This time, at one of these forums, I was able to witness a debate about the need to use vapor barrier tape.

One forum member, foaming at the mouth, argued that it was not needed and this was a good advertising ploy for one of the Western companies, another explained why it would be bad without it.

If you don’t yet know what a vapor barrier tape is, then this topic is just for you.

Welcome!

Vapor barrier tape for windows

Vapor barrier tapes for windows, like good finish slopes and installation seams will ensure decent window performance. In order for the window in your home to function well and for a long time, you should not miss such a moment as installing a vapor barrier tape.

The use of sealed tapes to isolate the assembly seam from vapors and moisture in the adjacent room prevents condensation from escaping onto the slopes.

If you have a kitchen, a room with a swimming pool or a bathhouse, then installing vapor barrier tape on your windows is a must.

Types of vapor barrier tape

Tapes can be either with one or two adhesive strips. Two adhesive strips are intended for attaching the tape with one side to the window and the other to the wall.

Vapor barrier tapes are also classified according to weather periods:

• for summer with air temperatures from + 5°C to + 35°C;
• For winter period with temperatures below 0°C.

The width of the tape also varies depending on needs, which allows you to ensure reliable vapor barrier seams of various sizes. When choosing vapor barrier tapes, keep in mind that its width should be about 45 mm greater than the width of the installation seam.

Tapes for outdoor work consist of foamed materials (this work requires well-sealing materials with plaster mortar, which will provide the required vapor barrier of the outer layer).

Vapor barrier tape can be butyl rubber, for sealing interpanel joints or for installing door or window blocks.

This tape contains non-woven fabric. During installation, it is primed, plastered and painted. This type also self-adhesive.

To protect against high humidity of the installation seam for dry finishing of slopes, there are metallized vapor barrier tapes on the market.

General information on installing vapor barrier tape

• Initially, you need to prepare your opening: clean the internal and outer surface opening and frame. The frame is inserted into the opening and is temporarily not secured.
• Then gently mark a line on the frame for attaching the vapor barrier tape.
• After carrying out the calculations and marking the window, we remove the frame and glue our internal vapor barrier tapes. We do not remove the paper strip that protects the inner adhesive layer, which will later attach to the walls.

As a rule, the installation of a vapor barrier tape on a structure is carried out before the seam foams.

Helpful advice!

Therefore, before finishing, dampening and filling with foam, you can remove the protective paper strips from the vapor barrier tapes.

This will allow you not to lose the adhesive properties of the tape. If you are driving hidden installation, then the tape should be attached to the ends of the structure from above and on the sides, and to the installation profile from below.

• External thermal insulation tapes can be glued no earlier than complete polymerization of the polyurethane foam has been completed.
• Installing a vapor barrier tape under the window sill can be done last. When installing a vapor barrier tape under a plaster layer, the tape must have an outer coating, which will ensure the necessary adhesion to this plaster layer.

In case if window quarter with gaps between the frame and the wall, another technique is used: the uneven joint can be covered with a window strip, and a vapor barrier tape can be glued to it.

Installation of vapor barrier tape on windows is installed in a continuous layer along the entire contour of the opening.

Do not forget that the use of finishing building materials in combination with a vapor barrier tape is allowed only if the moisture-permeable characteristics are observed.

source: moscowsad.ru

Self-adhesive hydro-steam and heat-insulating foil tape (vapor barrier)

Self-adhesive GPL tape is a reliable solution to problems associated with heat, hydro, and vapor barrier of assembly seams, joints, joints and junctions in various building structures– window and door blocks, products made of metal, concrete, wood, plastic, etc.

The vapor barrier layer of the material creates reliable waterproofing, thereby preventing the occurrence of spores, fungi and mold, which significantly extends the life of the structure.

Heat losses are significantly reduced and energy costs are significantly reduced.

The adhesive layer simplifies the fastening of the tape, making installation simple and easy, while ensuring reliable fastening tapes on all types of building materials.

GPL - Self-adhesive foil tape for hydro-steam and thermal insulation (vapor barrier).

The surfaces to be treated must be clean, dry and grease-free. The tape is unwound from the roller (width 90,120,150,200 mm) and cut into pieces of the required sizes.

Remove the protective film and, without stretching it lengthwise, stick the tape onto the surface to be treated. Press the tape tightly with your hands or smooth it with a roller, avoiding the formation of air bubbles.

Supplied in boxes 420x420x600 mm.
Recommended installation temperature is not lower than +10°C.

Self-adhesive heat-, hydro-, vapor barrier tapes GPL - consist of foamed polyethylene laminated on one side with a metallized polypropylene film, on the other side a layer of special waterproof adhesive is applied, which allows the material to be securely fastened to metal, brick, concrete, wood, plastic and other structures .

Sticky layer - a special waterproof adhesive made of synthetic rubber with increased adhesion to various materials, which allows the use of tapes without prior surface preparation.

It is important!

Material Dimensions

• Thickness of polypropylene film (µm) - 20
• Thickness of NPE -Gazovka (mm) – 2
• Length (m) - 15
• Width (mm) - 90 / 120/150/200

Material characteristics

Thermal reflection coefficient, no less than 95%
Thermal conductivity coefficient, at 20°C, no more than - 0.038 - 0.051 W/m °C
Heat absorption coefficient for a period of 24 hours, S - 0.48 W/(m2 °C)
Specific heat- 1.95 kJ/kg °C
Thermal resistance, per 1 mm of thickness, m2 - 0.031 °C/W
Vapor permeability - 0 mg/(m h Pa)
Dynamic modulus of elasticity (under load 2-5 kPa) - 0.26-0.6 MPa
Sound absorption, no less than - 32 dB
Smoke generating ability - D3
Flammability group - G2

source: www.profband.ru

Installation of internal vapor barrier sealing tape

For internal sealing of the assembly seam, the following is used:

a) vapor barrier tape (duplicated) based on aluminum foil, laminated with non-woven fabric, allows you to protect the installation seam from the inside from moisture and prevents it from escaping from the seam to the surface internal slopes.

For easy and reliable fixation, the tape contains two adhesive strips of glue and butyl, located on two different sides. It is recommended to use it around the entire perimeter of the window for subsequent finishing of slopes using a dry method.

b) vapor-tight sealing tape made of non-woven fabric coated with a self-adhesive plastic-elastic mass based on butyl rubber high degree stickiness.

The peculiarity of butyl rubber tapes is that they are quite heavy weight. And, if you compare butyl rubber and reinforced foil tapes with the same width of 120 mm, it turns out that reinforced foil tape is almost 5 times lighter than butyl rubber tape.

The low weight of the tapes makes it easier to work with them during installation, and also significantly reduces fare when transporting belts over long distances.

However, tapes based on reinforced foil with adhesive strips have adhesion only to a well-cleaned and degreased surface of the internal slope, while butyl rubber tapes have a tighter fit and better adhesion to the wall opening.

To install the internal vapor barrier sealing tape, you must do the following:

1. Cut the tape into pieces equal to the width and length of the window +10 cm (to form corner joints). Joining of tapes along the length is allowed “overlapping”, at least ½ of the width of the tape.
2. Remove the protective paper from the vapor barrier tape from the side of the duplicated strip and glue it to the frame profile from the outside.
3. The tape is attached by means of a self-adhesive duplicated mounting strip in a tensioned state (tightly, without folds or bulges) to the outer surface of the box from the inside vertically and horizontally across the ceiling. The inner edge of the adhesive layer must coincide with the inner edge of the frame. Tape protecting the butyl rubber layer on at this stage installation is not removed.

The adhesive strip has a fairly high resistance to low temperatures without loss of adhesive properties.

Lack of adhesion can occur if the acrylic adhesive strip is left in the cold for a long time with the release paper removed.

Also, the adhesion of the adhesive strip decreases when working with cold window blocks, since when the worker breathes, steam (moisture) is released, which partially condenses on the surface of the cold window block, which also reduces the adhesion of the adhesive strips.

To prevent this defect, it is recommended to keep the adhesive layers with the release paper removed to a minimum possible time, and also wipe the surface of the window block with a dry rag or paper napkin immediately before gluing the tapes to it.

source: www.wikipro.ru

How to properly apply vapor barrier tape on PVC windows

Question: How to properly use vapor barrier tape for PVC windows and at what temperature?

Answer: Installation of vapor barrier tapes on plastic windows is carried out as usual in those rooms where there is high humidity air-kitchen, sauna, swimming pool.

The tape allows you to protect the installation seam from moisture and steam emanating from the room and thus prevents condensation from escaping into window slopes. Vapor barrier tapes are produced with one or two adhesive strips.

The tape with two adhesive strips is very convenient to attach to the window and to the slope. Vapor barrier tapes are divided into summer and winter, depending on the weather conditions in the room.

Summer tapes can be used at air temperatures from +5 to +35C, and winter tapes at air temperatures below 0 degrees. You need to choose a tape for windows of such a width that it is 45 millimeters wider than the width of the mounting seam. This will allow you to ensure reliable vapor barrier at the installation seams of your windows.

The technology for installing windows and using vapor barrier tape is as follows. We clean the opening from dirt and dust, install the window frame and, without securing it, mark the lines for attaching the vapor barrier tape on the walls of the opening and on the window frame.

We remove the frame from the opening and glue a vapor barrier tape onto it; we do not remove the protective strip on the part that will be glued to the wall!

Helpful advice!

We install vapor barrier tape on a PVC window with one piece of tape, without breaks!

Now you can assemble the window with sashes and install them completely in their place. We install the vapor barrier tape on the window sill last.

source: blogstroiki.ru

Materials for window installation

PSUL tape.

It is used when installing window blocks to create a ventilated assembly seam.

Corresponds to GOST 30971-2002 “Installation seams of joints connecting window blocks to wall openings.”

Ensures reliability and durability of the assembly seam. The material is a self-adhesive polyurethane foam tape impregnated with a special composition. The tape is supplied compressed and rolled into rollers.

A wide range of standard sizes of tape sealant allows you to select a material to protect seams of almost any size.

Application of PSUL tapes. The scope of application of the tapes is a universal multifunctional tape. The tape is used to protect moving and fixed joints from water, noise, cold, dust penetration and other unfavorable factors.

Typical application examples:

• Sealing joints and moving seams of panels, blocks and small pieces wall materials on building facades;
• Sealing the gaps between the window and door frame and an opening in the wall;
• Sealing gaps between translucent structures and building walls;
• Sealing of seams between sections of prefabricated structures.

BC tape.

BC tape is intended for finishing internal slopes of window openings using the dry method (plasterboard, plastic, sandwich panels).

BC tape is a vapor barrier tape used to create a ventilated assembly seam.

The BC tape prevents condensation from forming on the surface of internal slopes and protects the mounting foam from moisture from the room side.

The tape has an adhesive layer covering the entire width of the tape, protected by an anti-adhesive film. The tape is supplied in rollers 50 linear meters long and of various widths.

BC+ tape.

BC+ tape is intended for finishing internal slopes of window openings using the dry method (plasterboard, plastic, sandwich panels).

BC+ tape is a vapor barrier tape used to create a ventilated assembly seam.

BC+ tape prevents condensation from forming on the surface of internal slopes and protects the mounting foam from moisture from the room side.

The tape has an adhesive layer covering the entire width of the tape fastening, protected by an anti-adhesive film, on one side and an adhesive strip, for ease of installation, on the other side.

VM tape.

VM tape is intended for finishing the internal slopes of window openings with subsequent application of plaster.

VM tape is a vapor barrier tape used to create a ventilated assembly seam.

VM tape prevents condensation from forming on the surface of internal slopes and protects the mounting foam from moisture from the room side.

The tape has an adhesive layer covering the entire width of the tape, protected by anti-adhesive paper. The tape is supplied in rollers 25 linear meters long and of various widths.

VM+ tape.

VM+ tape is intended for finishing the internal slopes of window openings with subsequent application of plaster.

VM+ tape is a vapor barrier tape used to create a ventilated assembly seam.

VM+ tape prevents condensation from forming on the surface of internal slopes and protects the mounting foam from moisture from the room side.

The tape has an adhesive layer covering the entire width of the tape, protected with anti-adhesive paper, on one side and an adhesive strip, for ease of installation, on the other side.

The tape is supplied in rollers 25 linear meters long and of various widths.

Water vapor barrier tape (GPL).

The base is foamed polyethylene, which has high thermal insulation properties. Due to the closed cellular structure, polyethylene foam has extremely low hydroscopicity, i.e. practically does not absorb moisture.

Polyethylene foam gives the tape elasticity, which is necessary for sealing seams with various irregularities. The outer layer is a metallized polypropylene film.

Polypropylene film has high mechanical strength and resistance to alkalis, acids and organic solvents, thanks to this, the reflective layer is reliably protected from oxidation and mechanical damage.

It is important!

In addition, polypropylene film is a good vapor barrier.

To prevent the layers in the roll from sticking together, sticky layer protected by siliconized film.

Application: heat, hydro, vapor barrier of assembly seams and joints in various building structures - window and door blocks, metal products, concrete, wood, plastic, etc.

Water vapor barrier tape (GPL-S).

Self-adhesive heat, hydro, vapor barrier tapes - consist of foamed polyethylene laminated on one side with a metallized polypropylene film, on the other side a layer is applied special glue, which allows you to securely fasten the material to metal, brick, concrete, wood, plastic and other structures.

An additional adhesive strip is applied on the film side for ease of installation. The base is foamed polyethylene, which has high thermal insulation properties.

Due to the closed cellular structure, polyethylene foam has extremely low hydroscopicity, i.e. practically does not absorb moisture. Polyethylene foam gives the tape elasticity, which is necessary for sealing seams with various irregularities. The outer layer is a metallized polypropylene film.

Polypropylene film has high mechanical strength and resistance to alkalis, acids and organic solvents, thanks to this, the reflective layer is reliably protected from oxidation and mechanical damage.

Application: heat, hydro, vapor barrier of assembly seams and joints in various building structures - window and door blocks, metal products, concrete, wood, plastic, etc.

Replacing windows in a residential or commercial space is always accompanied by the protection of the weakest components of the structure: the seams between the frame and the wall. It is produced by filling the space between the window opening and the frame using polyurethane foam. This material has excellent sound and heat insulation qualities. However, with insufficient or incorrect protection under the influence of moisture and ultraviolet radiation, the foam begins to collapse and lose its original properties.

To avoid this, you need to take measures to seal the seams and protect the filler. To do this, waterproofing is used on the outside, which prevents natural precipitation from getting on the porous insulation, while on the inside, a vapor barrier for PVC windows is used, which protects the foam from the effects of water vapor.

The structure of vapor barrier for a plastic window is shown

What should the vapor barrier be like?

Vapor barrier prevents moisture from the air in the room from being absorbed into thermal insulation material. The vapor permeability coefficient of vapor barrier of internal joints for PVC windows should be no more than 0.01 mg/(m*h*Pa).

To protect joints use:

• silicone;
• backing cords;
• Lena PSUL;
• butyl rubber tapes;
• reinforced foil.

PSUL tapes are designed to create an assembly seam with natural ventilation.

The choice of vapor barrier should be made taking into account subsequent finishing. So there is material for dry construction (plasterboard, plastic), wet plaster, there is separately for protecting the joints of wooden windows in wooden houses, for internal and external use.

The tape can be either single or double adhesive

Butyl rubber tapes are similar to self-adhesive foam rubber, but with a protective impregnation. With their help, all seams between the window and the wall of the house are sealed efficiently. Also, a vapor barrier for windows can have either one adhesive side or two.

Vapor barriers for PVC windows are distinguished by seasonal periods:

1. warm season with air temperatures from 5 to 35 degrees above zero;
2. winter period with temperatures below zero.

Read more: Why are plastic windows harmful?

Vapor barrier prevents the destruction of polyurethane foam under the influence of moisture, prevents the appearance of damp corners in the window opening, the appearance of fungus and drafts.

If you don’t do a vapor barrier and slopes, there may be fungus

It should be noted that the price of vapor barrier for PVC windows is absolutely adequate and affordable to everyone. Very small costs for hydro and vapor barrier will increase the service life of windows, and protect the house from drafts and mold in the corners.

Installation of vapor barrier for windows

Below are general rules installation of vapor barrier for PVC windows, since for each a separate type tapes may have their own characteristics:

1. The window frame and opening are cleaned of dirt and dust.
2. The window is inserted into the opening without fixation; the places where the vapor barrier is attached are marked on the plastic.
3. The window is removed and a vapor barrier is glued to the marked places.

Concealed installation is carried out before the voids are foamed. The outer tapes are glued only after the mounting foam has completely dried. In any case, the vapor barrier tape is glued to the window in a continuous layer.

Do not forget that the choice of tape largely depends on the type of subsequent finishing. It is very important to use materials that comply with all moisture-permeable characteristics.

Where can I buy? Prices

You can buy vapor barrier for PVC windows at any hardware store. If you have to replace windows in your home, consult with repairmen which vapor barrier is best for you to choose, taking into account the final finishing of the walls.

True professionals will give you practical recommendations. But, if you come across “experts” who insist that using vapor barriers for windows is unnecessary, kick them to the curb. Someone's incompetence can later bring you a lot of problems with dampness and drafts.

Replacing windows in a house is always accompanied by the installation of protection for the junction of the frame and the wall. Polyurethane foam is applied between the opening and the frame - traditional and proven thermal insulation. The foam performs its role properly, but if exposed to extreme moisture or ultraviolet radiation, its quality may change for the worse.

To eliminate the possibility of such a situation in advance and save yourself from replacement in the future, you should think about sealing the seams. To do this, you need to install additional insulation.

A complete set of insulation allows you to avoid freezing of the room and minimize the penetration of moisture and noise.

The insulation between the wall and the window consists of three layers:

• Outer. Its function is waterproofing, which means protecting the room from any weather conditions - snow and rain.
• The load-bearing insulation layer is located in the middle of the joint and is responsible for heat and sound insulation. Protection from frost is provided by a porous material resembling polyurethane foam. The waterproofing agent prevents moisture from getting inside.
• The inner layer is also considered thermal insulation. Here the mechanism of heat conservation is different. This layer does not allow heat to escape from the inside, unlike the outer layer, which protects the premises from cold air flows from the street.

The vapor barrier of windows refers to the inner layer, but is not always included in the insulation system. Single-sided self-adhesive vapor barrier tape or Double-sided tape for vapor barrier - this is additional protection. The need to use tape increases if the window is installed in a room that requires increased content moisture: kitchen, sauna, bathhouse.

Installing vapor barrier tapes is no more difficult than installing other types of seam insulation. However, a vapor barrier can help avoid subsequent serious problems with the entire window protection system. When installing a vapor barrier, in some cases you may need a couple of additional accessories, for example, vapor barrier tape. This is worth considering.

Classification of vapor barrier tapes

Vapor barrier tapes are manufactured in two versions:

• tapes with one adhesive side;
• double-sided vapor barrier tapes.

The first type of tape is attached to the window frame of the window. The second allows you to choose the mounting location: both on the frame and in the opening.

In addition to differences in adhesive structure, tapes are divided into two types according to climatic design:

• for predominantly warm average annual weather, “summer” vapor barrier films are suitable;
• in the presence of subzero temperatures“winter” tapes are used.

Adhesive surface of vapor barrier tapes

All vapor barrier films are equipped with an adhesive strip. The absence of the need to apply glue yourself eliminates the possibility of poor-quality fastening of the tape, as well as moisture getting into the thermal insulation environment.

The material for the adhesive layer of the vapor barrier tape is butyl rubber or, in cases with high humidity, metal. Tapes containing rubber film are used for windows, balconies and doors in almost all types of premises. The basis of such a vapor barrier is non-woven fabric.

Types of vapor barrier tapes

The most common types of tapes, depending on the material:

• One of the most popular butyl rubber tapes is PSUL (pre-compressed sealing tapes), which are responsible for external vapor barrier, finishing of external joints and tight connection between frame and wall.
• GPL polyethylene tape is made from foam material. On one side it is treated with lamination. The strip contains metal inserts and an adhesive part along the entire length and width. Thanks to its well-thought-out composition, it is almost universal and is recommended for insulating all types of door and window frames.
• Vapor barrier tape for aircraft windows. Suitable for insulating joints if a subsequent dry method of finishing slopes is planned. Typically used on plastic or plasterboard elements. The connecting tape protects surfaces from condensation. The wide adhesive strip makes the installation of the vapor barrier strip simple and quick.
• Vapor barrier tape VM. Just like other types of tapes, it attaches perfectly to window and door frames. Installation is carried out in sequence from the frame. The strips of tape are attached overlapping in order to avoid possible heat leaks during operation of windows or doors.

Butyl rubber tape has a high specific gravity. PSUL tape weighs approximately 5 times more than tape made with reinforced aluminum foil with the same width. The differences between the types of tapes also lie in the surfaces for which they are usually used. The thick rubber tape can be firmly attached to the wall, and there is no need to use heavy insulating materials for gluing to slopes. For this case, lightweight foil-reinforced strips are preferred.

GPL tapes

GPL are vapor-waterproofing tapes that perform moisture protection as the main task. These tapes make up outer layer insulation with additional vapor barrier function. Self-adhesive vapor barrier tape is made of polyethylene foam.

Polyethylene foam has a porous structure, has good thermal insulation properties and almost zero hygroscopicity (does not absorb moisture). The presence of this material in the tape makes it elastic and provides high-quality sealing with any surface, including uneven ones.

On one side the strip is laminated with a thin film of metal, on the other side there is glue. A special moisture-resistant adhesive allows the tape to easily adhere to any materials: plastic, metal, wood, brick, without requiring labor-intensive preparation.

In general, polypropylene film has significant resistance to destruction and chemical resistance to both alkalis and acids. Thanks to these qualities, polypropylene vapor barrier for windows is used without wear and oxidation.

Characteristics of GPL

GPL vapor barrier tape is characterized by:

• heat reflection – at least 95%;
• thermal conductivity – 0.04-0.05 W/m °C;
• specific heat capacity – 1.95 kJ/kg °C;
• zero vapor permeability;
• sound absorption - from 32 dB.

The tape is transported in the form of a twisted roll. There is no gluing of the layers; to prevent it, a paper film is laid.

Dimensions of self-adhesive GPL tape

The dimensions of the insulating strip for plastic windows are characterized by width, length and thickness:

• The width varies according to the buyer's needs. Standard sizes– 90/120/150/200 mm;
• Typical tape roll length is 15 m;
• The thickness of the tape has two layers:
  • the first insulating layer is non-crosslinked polyethylene foam, 2 mm;
  • the second is the vapor barrier itself - polypropylene film, 20 microns. This thin film relative to the entire thickness of the layer is enough to prevent condensation from falling onto the slopes of the window opening, and the entire system of protecting the window from weather conditions works better.

Installation of vapor barrier is carried out at a temperature of 10°C.

Installation of vapor barrier tape

Installation of vapor barrier tape is carried out in several stages:

• Preparation and processing of window/door openings. The surface of the opening walls and the frame must be cleaned of dust. The less contamination, the more reliable the thermal insulation.
• It is necessary to mark the line for attaching the vapor barrier tape. To do this, you need to place the frame in the opening without securing it, and visually calculate where you need to draw the line.
• After this, the frame is removed back, and the vapor barrier strip is glued along the marked lines.
• The paper films covering the adhesive part are removed last.
• The installation of the vapor barrier tape is completed by covering the seam with foam.
• If it is necessary to install the tape in the area under the window sill, then it is done at the very end.

When installing a vapor barrier tape, subsequent application of plaster may be required. In this case, the open part of the tape must be made of a material that provides the best adhesion of the insulating strip and decorative covering between themselves.

The vapor barrier tape must be glued around the perimeter of the frame in a continuous layer, without gaps. Optimal thermal insulation is facilitated by the selection of finishing materials adjacent to the insulation, which have acceptable moisture permeability in this case.

Accessories for vapor barriers

When installing a vapor barrier, minor difficulties may arise - overlapping strips and overlaps. You may consider this not dangerous for tightness, but in the end you will most likely get problems with heat and vapor barrier. Therefore, when installing a sealed vapor barrier for PVC windows, you may need additional accessories, for example, self-adhesive tape. In some cases, glue is most convenient.

If a vapor barrier metallized tape is attached to a non-smooth surface, it may require additional reinforcing force.

Self-adhesive tape can be the same as the vapor barrier sheets themselves, single- or double-sided. They are purchased if it is necessary to additionally glue the joints of vapor barrier strips and correct damage to the strips.

In the case of a double overlap or adhesive tape to wood or metal, double-sided tape is often used. With double overlap, i.e. When attaching a strip to pipes or doors, it is more convenient to use one-sided.

Cost 1 linear m of vapor barrier tape averages from 25 to 45 rubles. The price tag for additional products, for example, double-sided tape, is quite high (up to 1,400 rubles). Therefore, when purchasing them, everyone is guided by the installation process, the desired degree of confidence in the operation of the system and the possibility of spending money.

Video: using vapor barrier film for plastic windows

In general, vapor barrier is not currently considered mandatory. Its installation is often determined by the choice between reinsurance against possible unpleasant situations or savings. Some producers and buyers choose a budget option, which does not include vapor barrier on windows. However, a wide range of products for vapor barriers allows you to make the most appropriate choice, without compromising the safety of operation of the entire window system.

September 17, 2016
Specialization: professional in the field of construction and renovation ( full cycle carrying out finishing works, both internal and external, from sewerage to electrical and finishing works), installation of window structures. Hobbies: see the column "SPECIALIZATION AND SKILLS"

Waterproofing tape for PVC windows, as well as other materials for installation, are used relatively rarely: their use increases the cost of work, since a set of high-quality mounting tapes to install one structure costs approximately 15–25% of the cost of the entire window.

And yet, if you plan to glaze the house “for yourself,” using modern materials is not only possible, but also necessary. That is why I decided to write a short review on mounting tapes, their purpose and correct use.

Purpose of mounting tapes

If we approach it from a formal point of view, then use special vapor-permeable and vapor barrier materials for installation PVC structures necessary first of all according to requirements industry standards. The use of tapes is regulated by the following documents:

• GOST R 53338-2009 “Vapour-permeable, self-expanding, self-adhesive tapes for construction purposes”;
• GOST 30971-2012 “Mounting seams of junctions of window blocks to wall openings. General technical conditions";
• GOST R 52749-2007 “Window installation joints with vapor-permeable self-expanding tapes.”

That is, it is basically impossible to install windows according to GOST without using tapes. But there are also rational explanations for the need to use such materials. Some of them are set out in the already mentioned GOSTs, and some can be formulated based on many years of experience in the installation, repair and operation of translucent structures:

1. To seal the joint between the window and the window opening, self-expanding foam based on liquid polyurethane is used. Despite having a number of objective advantages, foam also has disadvantages - first of all, it is vulnerable to ultraviolet radiation.
2. To protect the foam from UV radiation, self-adhesive tape is used, which covers the mounting seam from the outside.

1. The next aspect that justifies the need to use special tapes for installation is ventilation, or more precisely, liquid drainage. When operating the window without additional protection, which is formed in the room, partially collects inside the assembly seam, reducing the efficiency of heat conservation. To avoid this, a vapor barrier material can be used to seal it from the inside of the room.
2. However, it is important not only to protect the foam from moisture, but also to ensure the unimpeded escape of water vapor beyond the assembly seam. For this purpose, exclusively vapor-permeable tape is used for exterior finishing, which guarantees normal diffusion of moist air .

The question is whether it is necessary to glue vapor barrier tape or use vapor permeable material, is largely debatable. On the one hand, the efficiency of these materials is really quite high, so their use in installation will clearly affect the functionality of the window in the best possible way.

On the other hand, the price of mounting tapes is also quite high, so to save money you can choose other methods: from the inside, for example, install a slope made of plastic (in principle, it provides good hydro- and vapor barrier), and from the outside, finish the installation seam with vapor-permeable plaster followed by painting .

And yet I repeat: the use of special tapes when installing a window structure into an opening is completely justified both from the point of view of standards and from the point of view of optimizing the indoor climate.

Types of materials

Type 1. Water vapor barrier tape

For PVC installation A variety of tapes are used for windows. Each type of such material has its own characteristics and advantages, therefore, to achieve maximum effect materials should be combined, combining them functional benefits the best way.

I’ll start my review of materials used when installing windows with the most popular - water vapor barrier tape:

1. Self-adhesive water vapor barrier mounting tape (GPL) is tape material, which covers the installation gap from the room side.
2. The basis of the tape is polyethylene or polyethylene foam film. On one side, the plank is laminated with a thin layer of aluminum foil, and on the other, one or two strips of adhesive are applied for installation.
3. The adhesive mixture used for application provides good adhesion to most materials - wood, concrete, brick, etc. Problems may arise when trying to cover an opening made of gas or foam concrete, so before purchasing installation material I recommend consulting with the seller or carefully studying what the manufacturer’s instructions say about this .
4. The structure of the tape ensures almost complete tightness of the finished assembly seam: neither the gluing area nor the polyethylene strip itself allows air and water vapor to pass through.

1. The polymer structure provides the product with additional advantages: the finishing material is not afraid of not only moisture, but also the effects of acids, alkalis, and other chemicals. active substances, and also does not degrade under the influence of ultraviolet radiation.

Type 2. Insulated water vapor barrier tape

Insulated tape is, in fact, a modification of a conventional water vapor barrier material. Its key features include:

• increased thickness of the base, which is made exclusively from foamed polyethylene;
• a denser foil layer based on a durable polypropylene film.

Thanks to these design features:

1. The product is no worse at preventing the diffusion of liquid and water vapor and the penetration of moisture into the middle part of the assembly seam. This ensures the most effective hydro- and vapor barrier.
2. The increased thickness of the base and its porous structure help reduce heat loss. Foamed polyethylene acts as window insulation.
3. Finally, the foil coating also plays an important role. Thin layer metal on an elastic base reflects infrared radiation, performing the function of a “thermal mirror”. However, most of the heat generated heating devices, returns to the room.

The disadvantages of such products I would include their rather large dimensions: finishing installation gap with insulated tapes requires subsequent masking of the junction point using slopes, which is not always included in our plans.

Type 3. Pre-compressed tape (PSUL)

Another universal material– PSUL (pre-compressed sealing tape). This material is used to ensure self-ventilation of the installation seam:

1. The tape is a strip of porous polyurethane foam impregnated with a special composition. On one side, the strip is equipped with an adhesive layer protected by a special protective coating.
2. The product is supplied in rolled form (rolls or reels). It is necessary to unwind the material immediately before installation, since over time the product loses its properties.
3. During installation protective covering is removed and the PSUL is glued to the window structure. After this, the impregnation reacts with air, due to which the linear dimensions of the product increase. The tape expands and completely covers the installation gap.

Complete and high-quality overlap is possible only if the nominal size of the product specified by the manufacturer corresponds to the dimensions of the gap. So, for example, if I need to seal a 35 mm gap with my own hands, then for work I take a PSUL about 40 mm wide.

1. After expansion, the material becomes completely vapor permeable. This ensures unimpeded exit of water from the assembly seam.

Type 4. Inner tapes

In addition to these varieties, other products are also used for interior finishing of slopes. It is convenient to analyze their main features using the table, which I will give below:

Marking	Description
Sun	A product that you use for installing window structures if you plan to finish slopes using a dry method (plasterboard, plastic, lining, etc.). Provides effective vapor barrier, prevents moisture from entering the thickness of the assembly seam. The tape is installed using a self-adhesive layer with a protective coating.
VS+	It is used for the same purposes as BC tape, but is thicker. An additional advantage is the presence of a foil layer, which provides more effective vapor and heat insulation.
VM	A hydro- and vapor barrier material, which is used if it is planned to plaster the slopes on the inside of the window opening. We protect the mounting foam from moisture, while ensuring maximum adhesion to the plaster mass.
VM+	A more effective version of the previous product, used for the same purposes. Key Feature is increased resistance to moisture.

Other types of mounting tapes

In addition to the products described above, other types of tapes are used for the installation of translucent structures:

1. Diffusion tape for exterior finishing. Used in combination with PSUL or polyurethane foam. Provides protection of the assembly seam from moisture and ultraviolet radiation while maintaining vapor permeability. Finishing the junction unit with diffuse material allows you to maintain a natural level of ventilation: air will freely flow out from the middle part of the installation gap.

1. Butyl rubber mounting tape under the window sill. As the name suggests, it is used to seal the junction under the window sill and protect the insulation from blowing, moisture and heat loss. Like other materials in this category, installation is carried out using a self-adhesive layer.
2. Non-woven material for installation under low tide. It has high vapor permeability and is glued to the base of the opening under the drainage strip. In addition to providing ventilation, it significantly reduces the noise of galvanized metal flashings, acting as a shock absorber and dampening some of the loud sounds.
3. Adhesive tape is a universal material that is used for installing lightweight structures. For example, self-adhesive reflective film is popular, and mosquito net with fastening tape is also very convenient to use.

How to use it correctly?

The technology for using installation years when installing PVC profile windows is quite simple. I use the following algorithm:

1. First, I prepare the opening: I remove the old structure, level the walls, remove dust and dry all surfaces. It is desirable that the edges of the opening be more or less even, so before installing the window it may be necessary to refine them using a quickly hardening solution.
2. Then I cut water vapor barrier tapes, PSUL and diffuse material. I cut the products along the length of each side of the window with an overlap of at least 10 cm (these areas are used to form a corner joint).

1. I paste the tapes onto the window frame, removing the protective film from one of the adhesive strips. On front surface I glue PSUL on the outside of the structure in a compressed state.

It is desirable that the PSUL is completely hidden behind the wall fence, so before gluing, I usually fit the window to the opening, making marks at the installation site.

1. I install the structure in the opening and fix it using the chosen method - either using anchors or using mounting plates.

1. I fill all the gaps with self-expanding polyurethane foam.
2. I shoot from the inside and outer tape protective strips and glue their edges to the opening, completely covering the foam.
3. If installation is carried out in winter time, I use specialized materials with glue that maintains adhesive ability at low temperatures.

1. Before installation additional elements I separately glue to the support profile or the bottom of the frame a material that protects the space under the window sill and under the drainage strip.
2. At low tide, I stick a PSUL strip on a horizontal surface: it acts as a shock absorber, and therefore the metal canopy will not rattle when there are gusts of wind or raindrops hit it.

Cost of materials

As I noted at the very beginning, the high price of mounting tapes partially limits their distribution. But at the same time, if you know exactly what you need, there is a chance to fit within the budget allocated for glazing.

Conclusion

Both vapor-permeable and vapor barrier tape for plastic windows may not be included in mandatory set parts for successful installation. But their use allows you to fully comply with GOST requirements. And also ensure the formation of a favorable microclimate in the room - primarily through the normalization of the installation seam.

The video in this article will help you master the technology of using such parts, and when choosing a product, you can consult with me and other experts by asking questions in the comments.

September 17, 2016

If you want to express gratitude, add a clarification or objection, or ask the author something - add a comment or say thank you!