Vapor barrier metallized tape. Tapes for windows: review, description. Insulation with adhesive tape

To protect the installation seams in window openings from exposure to moisture, use vapor barrier tape. It is made from butyl rubber or aluminum. This material is glued to damp polyurethane 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 for a long time if the installation is carried out 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 premises, we make a denser layer of the 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 a thermal insulation layer against condensation, which is present not only in the bathroom, but also in an ordinary room. In the process of finishing window slopes stick a special tape. The principle of vapor barrier is based on blocking the contact of moisture with polyurethane foam, forming an average protective layer. Materials with low elasticity and permeability to water and air 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 are produced in the form of a coiled and compressed material, similar to a sponge. Absorbing moisture, the material swells, sealing all existing cracks. Vapor barrier tape for plastic windows has a number of advantages:

1. isolates moisture;
2. It is consumed economically, with virtually no waste;
3. does not emit toxic substances;
4. Easy to stick;
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, tapes are produced various sizes, thanks to which you can isolate any seams. When choosing a material, keep in mind that it must exceed the width of the gap by 4.5 cm. To work with outside tapes made of foam materials are suitable for buildings, 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. Inside it is laid non-woven layer. 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 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 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 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, etc. 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 – next quality option material for processing seams. It is used for interior work, and wet is applied on top plaster mortar. Vapor barrier VM+ is a more complicated option with better performance characteristics.

The last type is GPL (water vapor barrier material). It is made from foamed polyethylene High Quality. 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 correct gluing– noise 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. Clean the window opening from dirt, dust and debris.
2. Before installation, remove the PVC window and wipe with a dry cloth.
3. Place the structure in place and mark the places where the tape is attached on the frame and wall.
4. The tape is attached to the window frame before applying foam along the seam.
5. Take out the structure and stick a vapor barrier on its surface around the perimeter.
6. Before replacing the window, remove the remaining protective film from the adhesive surface.
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.

To window design has served for a long time, its installation must be carried out in strict compliance with existing technology. External material for steam, heat and water insulation must be glued after polyurethane foam completely polymerizes. 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 building material. Uneven joint between wall and window frame cover it with a flashing, 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 peels 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 at outside thermal insulation 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 water and thermal insulation. Polyurethane foam, filling the space between the opening and the frame, perfectly insulates from airborne 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 ensure that moisture from the outside air does not penetrate into the thermal insulation materials of the joint. 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 used to protect windows with plastered slopes different means isolation. For wooden windows installed in log houses, natural fillers are usually used - sphagnum, jute, flax tow, etc.

Vapor barrier device

There are three layers:

From the inside - thermal protection prevents heat loss from the room to the street
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 installed in wet rooms - kitchens, baths or showers
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. According to climatic modifications, the 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, ensures a tight connection of the window frame with outer 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 the window frame, with an 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, the 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 installation 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 environment, and as a result - good durability of GPL tapes.

They produce GPL tapes in standard sizes width 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 final installation ram
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 the outer side of 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, adhesives recommended by the manufacturers or tape are used

The issue of the need for vapor barrier of windows is decided by each owner, based on the specific operating conditions of the windows. Budget options Installation of tape is absolutely excluded. But many experts believe that vapor barrier of windows is by no means a reinsurance, but a real opportunity to increase the service life of window systems and improve the indoor microclimate, and saving in this case is not an 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 that this was a good advertising ploy for one of the Western companies, the other explained why it’s bad without her.

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

The width of the tape also varies depending on needs, which allows for reliable vapor barrier of 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 subsequently 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 carrying out a 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 the polyurethane foam has been completely polymerized.
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.

If there is a 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 applied 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, vapor barrier of assembly seams, joints, connections 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 .

The sticky layer is a special waterproof adhesive made from synthetic rubber having 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 capacity - 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, covered with a self-adhesive plastic-elastic mass based on butyl rubber with a high degree of adhesiveness.

The peculiarity of butyl rubber tapes is their fairly 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 transportation costs when transporting tapes 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:

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.
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.
The tape is attached using a self-adhesive duplicated mounting strip in a taut state (tightly, without folds or bulges) to outer surface boxes from the inside vertically and horizontally on the ceiling. The inner edge of the adhesive layer must coincide with the inner edge of the frame. The tape protecting the butyl rubber layer is not removed at this stage of installation.

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 is reduced when working with cold window blocks, since when a 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 anti-adhesive paper removed for the minimum possible time, and also to 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 air humidity - kitchen, bathhouse, 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 onto the 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, protective strip on the part that will be glued to the wall, we do not remove it!

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 frames and the opening in the wall;
Sealing gaps between translucent structures and building walls;
Sealing 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 adhesive layer across the entire width of the tape fastening, protected by 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, the sticky layer is protected with a 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 of special glue is applied, which allows the material to be securely fastened 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.

Capable of increasing quality characteristics design, 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 than the installation seam.

general description

The described external installation tapes may consist of foam materials, they are required for and can 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 window and window frames. The product consists of a non-woven fabric; it is primed during installation, next stage it is covered with plaster and finally 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 preparation surfaces.

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, metal, plastic and concrete products.

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 is 0.031 °C/W, which is true for one millimeter of thickness. Professionals are sometimes also interested in such characteristics as specific heat. 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, specifications which were presented above, should 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 corner connections. 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, you need to keep the structure in open state less time, and before gluing, the surface of the window must be wiped with a soft rag or paper towel.

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.

High-quality glazing requires serious consideration and is impossible without proper insulation of the gap between the opening and the window. Often, organizations that install translucent structures limit themselves to traditional polyurethane foam, which is subsequently covered with plaster or other finishing materials. This approach has proven itself relatively well and in some cases does not cause any complaints from the consumer throughout the entire service life of the window.

However, glazing with one level of sealing of the opening does not meet the state requirements for the quality of services or goods provided, that is, GOST. To comply with these requirements, additional insulation is required at the junction of the window and the opening both from the street side and from the room side. Such insulation is ensured using special mounting tapes.

Scheme for using mounting tapes on windows

View from above

Mounting tape for windows is a self-adhesive material on a polymer or fabric basis, designed for additional sealing of window or door openings.

Types of mounting tapes for windows

The functions performed by the tapes are different and depend on the location of gluing, the condition of the opening, the features of the future finishing of the slopes, as well as the requirements for the window block. Next, we will consider the most commonly used materials common in the modern construction market.

PSUL

Pre-compressed sealing tape is used primarily on the outside of translucent structures. Its main purpose is to ensure unimpeded drainage of moisture from the area where the hatch connects to the opening.

Essentially, this is a tape product made of elastic polyurethane foam (looks like foam rubber), usually gray or black. One side of the material is covered adhesive composition, isolated with a protective film. The tape is supplied twisted into compact reels or rolls (depending on the size), which need to be unwound only during the installation process, since the material loses its quality over time.

An example of tape expansion over time

The main feature is the ability to fill joints as a result of expansion, which occurs as a result of contact with air. The tape isolates the gap from moisture and external influences from the outside, while simultaneously allowing excess liquid to evaporate from the inside.

Scope of application of PSUL:

Additional sealing of interfaces between elements of prefabricated structures;
Sealing the gap between the frame and the opening when installing windows and doors;
Insulation of joints between small-sized moving units of building facades;
Filling the outer seam between the slope and the frame during PVC installations windows

It is important to understand that to fill the gap efficiently, you need a tape of the appropriate size. For example, if the task is to seal a joint with a maximum width of 40 mm, you will need a PSUL with a nominal size of 45-50 mm.

Water vapor barrier (GPL)

This type of tape product is most popular when installing window blocks. Among its main features it is worth highlighting the following:

Water vapor barrier mounting tape is designed to seal joints on the room side.
Polyethylene film is most often used as the basis for self-adhesive material. On one side the tape is equipped with a foil coating, and on the other - with an adhesive composition.
The adhesive used provides reliable fixation on most surfaces (concrete, brick, cinder block, wood and others). The products of some brands have poor adhesion to foam blocks and aerated concrete, so before purchasing you should consult with the seller or read the attached instructions.
The structure of the material prevents the penetration of moisture or air both through the tape itself and through the gluing points. This ensures the maximum possible tightness of the joint of the opening and, as a result, the structure as a whole.
In addition to insulating from moisture, the tape does not deteriorate during prolonged contact with ultraviolet radiation and is not subject to destruction from exposure aggressive environments(household acids, alkalis and other reagents).

GPL is used for waterproofing installation gaps that arise when installing window and door units, as well as for sealing structures made of metal, wood, concrete and plastic.

GPL-S and insulated GPL

VM (VM+) tape

VM. Vapor barrier tape designed for sealing joints indoors. It is used in cases where wet finishing of slopes is planned (plastering or decorating tiles). Provides protection from moisture entering the joint of the opening and reliable fixation of the finishing coating.
VM+. A modified analogue of the previous product with similar properties. It has the best waterproofing qualities, which allows it to be used in rooms with high humidity(kitchens, showers).

VS (VS+) tape

Diffuse (vapor-permeable waterproofing tape)

It is used outside structures in conjunction with pre-compressed tape or in situations where it is impossible to use the latter. Traditionally, diffuse tape is used to isolate the area where the molding profile is attached, since PSUL cannot be glued to the place where it is fixed, but there are also frequent cases of use along the entire perimeter of the window block.

The structure of the diffuse tape prevents the penetration of moisture and cold air into the assembly joint; in addition, the material protects the polyurethane foam from exposure to solar ultraviolet radiation. In addition to its protective qualities, the tape has the property of allowing vapor formations to pass through from the inside of the joint between the frame and the slope, thus providing the necessary ventilation for this section of the structure.

Butyl rubber tape

Butyl rubber, used as the base of the tape, is a fairly elastic material with high adhesion to most surfaces. It is fixed equally firmly on stone, wood or plastic. It is also worth noting that it is environmentally friendly and almost completely harmless to the consumer. The main disadvantage is the flammability of butyl rubber, which requires compliance with appropriate standards for installation and subsequent operation.

Used as an insulating material on the inside of the structure. It is glued to the bottom of the window sill profile, like additional protection from blowing from the outside and penetration of steam into the assembly seam from the room side.

Installation features

The tape is applied both before fixing the window block in the opening and after installed structures. The first option is more convenient in cases with the installation of external insulation.

Let's consider the algorithm for using tape insulation using the example of gluing pre-compressed sealing tape (PSUL) and internal GPL-S with an additional strip of double-sided tape:

It should be remembered that the tape must be selected in accordance with weather conditions. Working in winter time, it is possible to glue only material intended for use in low temperature conditions.

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

Is it worth spending money on protecting window seams?

When installing the frame, consider several important points:

On the inside of the room we make a denser layer of the 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 of the inner surface is for vapor barrier.

Vapor barrier provides reliable protection of the thermal insulation layer from condensation, which is present not only in the bathroom, but also in an ordinary 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, which forms the middle 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. isolates moisture;
2. It is consumed economically, with virtually no waste;
3. does not emit toxic substances;
4. Easy to stick;
5. has a long service life.

Classification - what characteristics to pay attention to

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. For work on the outside of the building, tapes made of foam materials are suitable, which will ensure reliable sealing.

Moisture Insulation Tape

An adhesive finishing material made from butyl rubber is intended for processing window, balcony, door frames and joints 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 is 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.

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.

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 (water 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.

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. Clean the window opening from dirt, dust and debris.
2. Before installation, remove the PVC window and wipe with a dry cloth.
3. Place the structure in place and mark the places where the tape is attached on the frame and wall.
4. The tape is attached to the window frame before applying foam along the seam.
5. Take out the structure and stick a vapor barrier on its surface around the perimeter.
6. Before installing the window in place, remove the remaining protective film from the adhesive surface.
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.

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 thermal 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:

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

Read more: Installation of plastic windows in wooden house– process details

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 each individual type of tape may have its own characteristics:

The window frame and opening are cleaned of dirt and dust.
The window is inserted into the opening without fixation; the places where the vapor barrier is attached are marked on the plastic.
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.