Expansion tape for windows. Application of vapor barrier tape for plastic windows. Accessories for vapor barriers

29.10.2019

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Vapor barrier is required for plastic windows. Vapor barrier tape allows you to close joints, seams, protect the structure from wind and precipitation. Thanks to this element, it will not be possible to enter the room through the joints. cold air, which will ensure the greatest tightness of the room and minimal heat loss.

How to install windows correctly?

Modern builders most often use polyurethane foam for installation. M O Installation tape for windows together with sealant is applied after the foam has dried. It is needed in order to protect the material from moisture, as well as close possible cracks and stop the access of cold air to the room. If this condition is neglected, cracks will appear between the window frame and a wall through which cold air will enter the room. Drafts will appear, the windows will sweat a lot and freeze at the joints.

For the stages of window installation and common mistakes when installing them, see the link

When building a private house, you need to think in advance about the height, which ones will be more practical and look better.

Modern builders often use it to install doors and plastic windows. Read on the NBC website advice from professionals on how to choose it

What is vapor barrier used for in plastic structures?

It is worth considering that the more correctly the installation is done, the more reliable the structure will be and will last longer. Even if , but are inserted incorrectly, you will not get the desired effect.

It is necessary to ensure that workers comply with the following conditions:

Interior installation gap must be filled with foam thicker than the outer one.
The system must be three-layer. The first layer on the street side protects the entire pie from weather conditions, the middle layer is responsible for thermal insulation, and the inner layer protects against condensation.

Vapor barrier tape is necessary to protect the structure from water vapor.

To ensure that the vapor barrier does not interfere with plastering, special tapes should be used, over which the room can be finished.

What should you know about sealing?

Most often, windows are fastened using special bolts and: this material simultaneously serves as a reliable fastener, allowing you to adjust the position of the frame before the foam hardens, and as a high-quality insulation. However, sealing for the material is extremely important, since when moisture gets in, the foam begins to deteriorate over time, crumble and turn yellow, which negatively affects its properties.

Window tape works great to protect the foam. Even if you are going to use platbands, which will protect the structure from weather conditions, and can also give the frame decorative look, before installing them it is worth gluing the tape. It will help make the insulation high-quality, while making the work not much more expensive.

The most inexpensive and easiest to install vapor barrier for windows is a special tape, the sticker of which can be applied by anyone.

Joints and seams of any structure are the most vulnerable places. The same can be said about windows installed in a window opening. It is the installation seam that will be the most weak point throughout the entire structure. A poorly laid seam can allow heat to escape, moisture to enter and extraneous sounds from the street, finally, condensation, which forms due to temperature differences, will accumulate inside the insulation and deteriorate its characteristics, leading to destruction. The description of the characteristics of the assembly seam and the technology of its installation is given special attention in GOST. On this moment GOST 30971-2012 is valid.

Features of the technology. Why do you need a vapor barrier tape?

According to GOST, the installation seam must be three-layer. Each layer performs its own function:

The middle layer - the main one - provides heat and sound insulation due to its porous structure.
The outer layer protects from moisture coming from the street (it removes it) and from UV rays.
The inner layer is a vapor barrier. Essentially, it traps heat in the house and prevents steam from accumulating in internal space premises, penetrate into the insulating layer.

Thus, compliance with the seam construction technology is necessary to prevent moisture penetration, condensation formation, and improve heat and sound insulation properties. Refusal to install insulating layers will reduce the cost of installation and construction by about 15-20%, in general, but GOST does not allow such cases.

Classification of vapor barriers for windows

To install a PVC window, vapor barrier tape in a wide variety of varieties and diffusion vapor-permeable tape are used.

Tapes can have one or two adhesive surfaces. The first ones are installed on the frame itself, the second ones can be installed in window opening, gluing them both to the wall and to window profile. The range is divided into winter and summer options. Summer ones are designed for installation at temperatures from +5 degrees to +35 degrees, winter ones - for installation at temperatures of +5 degrees and below. Moreover, when installed in winter time It is necessary to warm up the surface of the window opening.

The tape should be approximately 5 cm larger than the width of the mounting seam.

Based on the material used, there are two types of tapes:

Butyl rubber tape with a reinforcing layer of non-woven fabric, designed for sealing joints.
Metallized tape, intended for installation in damp rooms.

Types of tapes

The functionality of the tapes is different, so when installing windows they use different varieties depending on the goals at each specific stage. A review of the tapes should be carried out.

	Material of manufacture	Where is it used?	Properties	Peculiarities
PSUL	Polyurethane	Used when organizing a ventilated assembly seam from the outside. Allows high-quality sealing of joints. Acts as a sound insulator when glued to the lower surface of the ebb.	Provides a tight fit of the frame to the wall.	It is necessary to unwind the tape (it is supplied rolled into rollers) immediately before installation. Over time, it expands and loses its sealing properties. The width of the PSUL tape must exceed the width of the installation gap.
	Non-woven material. BC+ – foil.	Used during installation internal slopes. Combines with plastic, plasterboard, protects against condensation.	Prevents moisture from the insulation used to insulate slopes, in particular mineral wool. BC+ has a double-sided adhesive layer. Is an effective vapor and heat insulation	There is an adhesive layer across the entire width. BC+ is thicker than BC.
	Non-woven material. VM+ – foil.	Used when finishing internal slopes, but under plaster.	Prevents condensation from penetrating into mineral wool insulation. VM+ has an adhesive layer on both sides.	Provides adhesion to plaster. VM+ is more resistant to moisture.
	It is made of foamed polyethylene, which is laminated on one side with a metallized film. On the other side there is an adhesive layer applied.		Combines the properties of several tapes. It has increased elasticity, mechanical strength and resistance to aggressive chemicals.	May not adhere well to gas and foam concrete.
	Used over thick layer foamed polyethylene than GPL. Metallized layer based on polyurethane film.	Universal tape. Used for heat, hydro and vapor barrier.	The difference from GPL tape is that there is an additional adhesive strip on the metallized film side. The tape has the best thermal insulation characteristics. Effectively reflects heat.	Quite voluminous, which is inconvenient when finishing slopes.
Diffusion tape	Polyester fabric with self-adhesive strips based on butyl rubber.	Used to seal the installation seam on the ebb side.	It is vapor permeable from the inside and has waterproofing properties from the outside.	Resistant to UV rays.
Butyl rubber mounting tape	Butyl rubber	Installed between the window sill and insulation.	Protects against blowing.	There is a self-adhesive layer.

Installation procedure for vapor barrier tape

The vapor barrier tape is installed after completion preparatory procedures: dismantling the old window, cleaning the opening from debris, dust, sealing and leveling large irregularities.

The window opening is wiped with a dry cloth and the window structure is pre-installed. In the process, the future location of the PSUL vapor barrier tape is marked.
The window is removed from the window opening and a vapor barrier tape is glued to the frame with a distance of 5 mm from the markings. In the corners, the tape is glued end-to-end, for which the tape is initially cut off with an allowance that will be used for fitting. The surface must be degreased and dust free.
On side profiles and the top one is glued with slope tape. leave an overlap of about 10 cm.
Install a window. Foam the seam.
Assembly seam with outside cover with diffusion tape.
Before installing the ebb, PSUL is glued lengthwise to its lower surface.
On the seam at the bottom of the window with inside attach metallized vapor barrier tape.
The tape on the window sill is glued last.

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 tapes for windows, like good finish slopes and assembly seams will provide 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 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 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, 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.

Delete protective film and, without stretching along the length, 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 .

In addition, polypropylene film is a good vapor barrier.

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

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 - 32 dB
Smoke generating ability - D3
Flammability group - G2

source: www.profband.ru

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 onto the surface of the 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:

Cut the tape into pieces equal to the width and length of the window +10 cm (to form corner connections). 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 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 may occur if the acrylic adhesive strip long time kept in the cold 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

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 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

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 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 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 is intended for finishing internal slopes window openings 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 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 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.

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. Outer layer— 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.

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.

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.

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 window designs. 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,” use modern materials 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 PVC installation designs are necessary primarily 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:

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.
To protect the foam from UV radiation, self-adhesive tape is used, which covers the mounting seam from the outside.

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, it can be used to seal it from inside the room. vapor barrier material.
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

A variety of tapes are used for installing PVC 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:

Self-adhesive water vapor barrier mounting tape (GPL) is tape material, which covers the installation gap from the room side.
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.
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 .
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.

The polymer structure provides the product with additional advantages: finishing material is not afraid not only of moisture, but also of 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:

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.
The increased thickness of the base and its porous structure help reduce heat loss. Foamed polyethylene acts as window insulation.
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 would include their rather large dimensions: finishing the installation gap with insulated tapes requires subsequent masking of the junction unit 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:

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.
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.
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 products. 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.

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 the varieties indicated for interior decoration other products are also used on 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:

Diffusion tape for exterior finishing. Used in combination with PSUL or with 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.

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.
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.
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:

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.
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).

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.

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

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

Before installation additional elements I glue it separately to stand profile or the bottom of the frame, material that protects the space under the window sill and under the drainage strip.
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, high price mounting tapes partially limit 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 favorable microclimate indoors - primarily due to 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

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"Robiband" is a trademark under the name of which high-quality components and sealants for windows are produced. Robiband window tapes allow you to quickly, reliably and efficiently seal window installation joints and seams adjacent to sheet materials roofs, and also protect thermal insulation materials from negative impact moisture and provide vapor barrier.

For convenience, practicality and efficiency, vapor barrier tapes are produced in rolls of different widths. Window openings, after the frames are installed, may have different way finishing, so Robiband tapes are produced both for dry finishing and for further painting and plastering.

Basis vapor barrier tape is aluminum foil reinforced with synthetic thread with an adhesive layer applied (can be single- or double-sided) thanks to which you can easily, accurately and quickly fasten the tape. To improve adhesion, one side of the tape is reinforced with non-woven material. It protects the insulation from excessive saturation with moisture on one side and at the same time does not allow moisture from the installation seams to pass into inner part window slopes.

It is necessary to prepare the surface for applying tape only if the surface begins to crumble a little or become absorbed. In other situations, before applying the tape, it will be enough to simply remove construction dust and other contaminants from joints and crevices.

Window tapes trademark Robiband easy to use, highly technologically advanced, operational characteristics, durability and endurance, despite various climatic conditions. In our online store you can buy reliable and practical vapor barrier window tapes at wholesale and competitive prices.