Izospan A – installation of wind protection for your home. Vapor barrier with isospan A, B and C: technical characteristics Windproof membrane isospan a technical characteristics

Izospan is a non-woven building material that is used for insulation of residential and non-residential premises. In addition, it is necessary for protection against moisture and water. This is especially important when creating a house plan with an attic and a garage, which must be properly insulated with water and heat.

The reader will learn in this article what types of isospan exist and what advantages this material has.

Izospan: material characteristics

Isospan film is now very common in the construction market. It is used as the first barrier layer when installing insulation: it prevents moisture from entering the main thermal insulation layer expanded polystyrene or other insulation. The material consists of pure polypropylene, is completely synthetic, and therefore does not completely absorb water. When creating an insulation plan, isospan must be taken into account in the work.

Attention! Izospan is recognized as a very effective material for insulating attics, garages, and one-story buildings.

The attic is attic space, which can be used for storing things or as living space. The walls of this room become the roof itself, which should be well insulated. Izospan insulates and protects from moisture and wind, preserving comfortable temperature inside the attic and throughout the house.

Similarly, isospan coating is used to insulate garages and other one-story non-residential premises:

protects metal from corrosion, wood from rotting;
prevents the occurrence of condensation and moistening of the insulation, which reduces the thermal insulation properties;
reflects air flows, protecting the room from cooling and drafts;
maintains a stable indoor temperature and does not release heat.

The following advantages of isospan can be highlighted:

waterproof;
durable and environmentally friendly (does not emit harmful impurities);
has high elasticity;
protects against ultraviolet radiation;
protects from wind;
does not release, reflects heat;
withstands high pressure;
durable (lasts about 50 years);
retains its properties in the range from minus 60 to plus 80 degrees Celsius.

In terms of creating comfortable conditions inside residential premises, isospan plays an important role, especially when arranging a house with an attic, garage and other one-story extensions in the Russian climate.

Types of material, their technical features

Nowadays, high-quality manufacturers create pure polypropylene and film from it using technological equipment, controlling the quality of production. Domestic companies are opening in Russia that offer building materials that are similar in quality to foreign companies and more favorable in price.

When choosing products, you need to focus on whether isospan has quality and safety certificates. Well-known manufacturers coordinate their production plans with legal requirements.

Nowadays, when finishing houses and non-residential premises, 4 main modifications of isospan are used, which have their own characteristics.

Izospan A

This is a film (membrane) that perfectly waterproofs and helps eliminate moisture and its vapor from the insulation. This modification is used to protect against wind and water and increases the service life of the insulation. It is used for insulating private houses, attics, garages and any other premises.

This isospan is resistant to mechanical stress and pressure, completely neutral to biological influences (mold, bacteria, etc.). Can stretch:

longitudinally by 190 mm;
transversely by 140 mm.

The material is fixed to the outside of the insulation as an additional barrier. For example, when insulating an attic, it is mounted on the roof with overlapping wide strips.

Important! The smooth surface should remain outside, the film itself should not come into contact with the insulation material. Otherwise, isospan will not be able to properly waterproof the room and insulation.

It is necessary that the membrane lies flat and does not protrude, swell or sag. Izospan A is secured with wooden slats and nails.

Izospan A can be seen in the photo:

Izospan B

This modification perfectly blocks the path of water vapor, which eliminates the impregnation of the insulation with steam.

Important! When creating a garage layout, this can be very important to ensure that there is no increase in humidity in the area where the vehicle is stored.

Izospan B is two-layer, used:

On pitched roofs.
On walls: external and internal.
To preserve floors in the basement, attic (attic).
In garages and others residential premises.

The vapor permeability index is 7, the material can also stretch: in the longitudinal direction by 130 mm, in the transverse direction by at least 107 mm.

Each layer of this material has its own functions:

the fleecy layer retains moisture and condensation;
The smooth part allows you to firmly fix the film with insulation.

Unlike the previous modification, isospan B is attached to the inside of the insulation. Fixed from bottom to top and overlapping. In order for the film to capture vapors and condensation, there must be a free space of at least 5 cm above the fleecy layer.

The appearance of the packaging of isospan B can be seen in the photo:

Izospan S

It also consists of two layers, but is used to protect an uninsulated roof, floors between floors, and floor insulation. Has high strength.

The film is used for vapor and water insulation:

uninsulated pitched or flat roofs;
frame, load-bearing walls;
wooden floors located parallel to the floor;
concrete floor.

Installation of non-insulated roofs (slopes) is carried out with an overlap (with a depth of about 15 cm), and is also secured using wooden slats. When arranging the attic of a house, this material perfectly insulates the room from moisture from entering environment.
If we talk about wooden floors, then the film is attached directly to the insulation with a small free space from the floor (4-5 cm).
When insulating a concrete floor, isospan S is placed directly on the floor and tightened on it.

Izospan S can be seen in the photo:

Izospan D

This modification is very durable and can withstand high pressure and loads. It is used for finishing roofs. In terms of waterproofing and protection from condensation, it can withstand even heavy snow crust on itself.

Excellent for arranging the attic of a house or garage in regions with heavy snowfall. The material protects wooden structures and non-insulated roofs. Izospan D is insulated with:

flat and pitched roofs;
concrete floors and ceilings at the basement level of the house.

The high strength of the film allows you to protect the living space from wind and moisture, even in cases where the roof allows moisture to pass through.

It is also mounted overlapping horizontally in strips, secured to the rafters of the roof of the house using slats. Installation on a concrete floor is similar to the previous modification of isospan, because in many ways isospan C and D are similar in their characteristics.

Izospan D can be seen in the photo:

The main modifications of the building material are described above; there are also varieties of these modifications that have different densities or additional qualities, for example, fire retardant additives, which provide greater fire safety and protect against fire.

Manufacturers also took time to create additional Supplies, which allow you to isolate seams and minor damage. We are talking about isospan tapes - these adhesive tapes allow you to isolate seam lines and uneven surfaces. It is enough that the working surface is dry and clean - isospan adhesive tape FL, SL will ensure good impermeability of such places. There is even a metallized tape that has a high durability rating.

Important points for installing isospan

The instructions for using isospan include the following points:

Laying this insulating material does not require any special knowledge; it can be done with your own hands, taking into account individual characteristics membranes.
The sales kit is always accompanied by instructions, which must be read carefully and act according to the instructions. For example, if you fix isospan reverse side, then all the work will be meaningless - no isolation will occur.
Fastening to wood is done using a stapler; you should not forget about sealing seams and possible cracks using isospan tape.
When installing a heat-insulating film, the metallized part should face the inside of the room, and the installation work itself is done end-to-end, without overlap. The seams are also sealed.

Izospan allows you to make life in your home comfortable and warm. Using this film in the basement or attic extends the service life rafter system, wooden floors, creates a stable microclimate in residential premises. Insulating the garage from moisture and condensation allows you to make the room dry and safe for the metal coating of the car and other equipment.

Modern technologies greatly simplify the arrangement of your home. By approaching the issue responsibly, each person will be able to avoid problems in their home for a long time!

The name of the material comes from the name of the company that produces it. It refers to several polymer films that are completely different in properties and purpose. All products of this brand are usually divided into three main groups:

Izospan A membranes protecting from water and wind. They are widely used in roofing, as well as facade works as protection of roof structural elements, as well as the interior from atmospheric precipitation. In this case, the film is able to pass steam through itself, bringing it out. This property of such membranes prevents moisture from forming condensation on the insulation or parts of the roof rafter system. Some varieties have fire retardant treatment. The average vapor permeability is determined to be around 3500 g/m² per day. It must be said right away that the material cannot be used on a roof with a slope angle of less than 35ºC. A mandatory requirement is that installation must be carried out only in normal weather;

films that do not allow water and steam to pass through belong to the Izospan V line. Unlike its brother, it is mounted indoors. After all, its task is to prevent steam from penetrating from the room into the thermal insulation layer and forming condensation there. Insulation boards covered with such a membrane always remain dry, which protects them from the formation of mold and fungal colonies. Instructions for use of Izospan B will be described in more detail;
Izospan C is designed not only to protect the insulation layer from wind, high humidity and steam, but also to create an additional insulating effect due to a special coating that can reflect infrared rays. This greatly reduces the energy consumption of the home, creating good savings on heating costs. It has a structure consisting of two layers. One layer is always smooth, and the other is rough, which better holds condensation. The material is very waterproof, more than 1000 mm. water Art. Its resistance to steam penetration is 7.0 Pa/mg.

Technical characteristics of Izospan films:

Vapor-permeable membranes ISOSPAN
Brand	Density, g/m²	Compound		Vapor permeability, g/m²/day, not less
A	110	100% pp	177/129	1000	250
AM	90		110/90	850	880
AS	115		165/120	1000	1000
Steam-waterproofing ISOSPAN
Brand	Density, g/m²	Compound	Longitudinal/transverse breaking load, N/5cm		Water resistance, mm.water column, not less
B	70	100% pp	128/104	7	1000
C	90		197/119
D	105		1068/890
DM	105		560/510
Reflective vapor-waterproofing ISOSPAN
Brand	Density, g/m²	K thermal reflection, %	Longitudinal/transverse breaking load, N/5cm	Vapor permeation resistance, m²hPa/mg, not less	Water resistance, mm.water column, not less
FB	132	90	330/310	vapor-tight	waterproof
FD	132		800/700
D.S.	92		120/80
Brand	Thickness, mm	K thermal reflection, %	Longitudinal/transverse breaking load, N/5cm	Vapor permeation resistance, m²hPa/mg, not less	Water resistance, mm.water column, not less
FX	2-5	90	176/207	vapor-tight	waterproof

Helpful advice! The instructions for use of Izospan B suggest that if the film breaks on any sharp objects, it can and should be repaired. To do this, the damaged area is glued with a special adhesive film.

All of the listed varieties, despite their differences, have a number of positive qualities common to them:

they are easy to install and are supplied in roll form;
are not afraid of ultraviolet radiation;
do not allow moisture to pass through;
their cost is quite suitable for anyone who is engaged in construction or insulation of their home.

Next, we will consider in detail the instructions for using Izospan B and its technical and quality characteristics, since it is this type of membrane that is in greatest demand, thanks to its very good combination consumer properties and prices.

Technical characteristics of vapor barrier Izospan B

TO this species These include two-layer vapor barrier membranes that can not only retain moisture, but also prevent steam from penetrating through them. They are 100% polypropylene. These films are produced in rolls with a width of 160 cm. One roll can cover a surface of 70 m². The film density is 70 g/m². These membranes are quite strong, since their tensile load along the fibers is 128 N/cm, and across the fibers is 104 N/cm.

Vapor permeability rates are very low and are around 22.4 g/m²/day. Water resistance - 1000 mm. water Art., which is enough. Resistance to ultraviolet rays observed within 4 months of continuous exposure. The technical characteristics of the Izospan B vapor barrier allow it to be used in a wide temperature range, which ranges from -60 to 80ºС.

Instructions for use of Izospan B

Before using this material for vapor barrier purposes, you need to familiarize yourself with some of the requirements for its installation:

When covering insulation installed on vertical or inclined surfaces, work must be carried out from top to bottom. The strips of material are fastened horizontally with an overlap of 15 cm. A special adhesive film allows you to isolate the joints;
Not everyone knows which side to put Izospan B insulation on. Meanwhile, this is very critical, since improper installation completely eliminates the effect of using this material. It is necessary to remember that the smooth side is always placed on the insulation, and the rough side is directed into the room;

Scheme correct application films for vapor barrier in the process using expanded clay

attach the membrane to the protected surface using wooden blocks, clamping strips and a construction stapler.

Since this couple insulating material has a wide range of applications, we will consider the features of installation on several types of surfaces. When creating a vapor barrier layer in the attic, the membrane can be attached to the rafters in two ways.

Vapor barrier is used to protect various structures from moisture and condensation, as well as steam. Thanks to the use of appropriate materials, it will be possible to extend the durability of the structure and prevent the formation of fungus and mold. Many manufacturers produce special membrane films for this purpose. Thus, isospan vapor barrier is quite popular.

Technical characteristics and types

Vapor barrier isospan is highly waterproof membrane, installation of which can be carried out in any weather conditions. After vapor barrier, the building structure will last several times longer. At the same time, a comfortable microclimate will remain in the room.

In fact, isospan is not only a vapor barrier, but also a waterproofing agent. Accordingly, the material must be laid on roofs and in saunas. In other words, we are talking about those cases when the room requires elevated temperature and high humidity levels. Although such a membrane will be quite expensive, it will become a truly indispensable element.

There are many types of vapor barriers on sale, which have their own advantages and features.

Izospan A – vapor-permeable membrane, protecting walls, roofs, facades and ceilings from condensation. At the same time, evaporation occurs inside the “pie”, so that the water does not damage the structure itself.
Izospan B is a two-layer universal vapor barrier, which is usually used only indoors. Using this material you can protect the roof, basement and attic walls. Izospan B can be used as insulation. This is explained by the fact that the material has a higher density.
Izospan S is a two-layer membrane with water vapor barrier characteristics. This material is used in attics and on non-insulated roofs.
Izospan D is a membrane that provides reliable vapor barrier any building structures. The material is used in the construction of concrete foundations, plinths and interfloor slabs.
Izospan AM is a high-strength material made of membrane film. Its special feature is protection against mechanical damage. It is customary to lay the material directly on the heat insulator, which will protect it from steam and condensation.

Other varieties

Less common types of vapor barriers can be found on sale.

Instructions for use of isospan

When using this material, specific modification must be taken into account. If we talk about isospan B, then it is used to insulate walls, roofs and ceilings. As a rule, the film is laid on top of the insulation. In this case, it is necessary to adhere to a certain sequence:

Thanks to this vapor barrier, you will be able to avoid the penetration of moisture or insulation particles into the room.

Izospan S differs significantly from other vapor barrier materials Possibility of use in the construction of roofs with a slope of less than 35˚. Thanks to this vapor barrier, an optimal microclimate is maintained in unheated attics. On walls and ceilings ground floors there is no condensation, which means there is no mold or unpleasant odor.

This modification is laid out as follows:

If the roof slope is small, the modification is laid on a plank flooring fixed to the rafters.

General instructions for installing vapor barrier yourself

Reading time ≈ 4 minutes

Modern construction requires innovative integrated approaches at all stages, including when installing wind and vapor barriers. Reliable protection constructions from wind and moisture are impossible without materials belonging to well-known brands in the construction world. Izospan is one of the new generation building materials used at construction sites throughout the country.

What is Izospan?

When a person first encounters the construction of any structure, he begins to analyze the building materials on the market. Questions also arise about Izospan: what is it, what is it for, what are its features?

Izospan vapor barrier is currently represented by a fairly wide range of films and membranes. They are designed to increase the service life of thermal insulation in buildings various types. At the moment there are more than 14 of them. All brands can be divided into 4 large groups: A, B, C, D. They contain many varieties, each of which has its own characteristics.

Areas of application

All varieties of this building material are designed to insulate structural elements from moisture, wind or steam. It is used to protect all structural elements: roofs and facades, walls and floors, ceilings. The properties of Izospan allow it to be used both in small-scale construction and on large construction sites. The specific scope of application depends on the variety.

Application Izospana A makes it possible to protect the internal parts of structures and thermal insulation from moisture, eliminating the accumulation of condensation. On one side, these membranes are impenetrable to moisture and wind, and the other side allows the removal of water vapor. It is mounted on the outside of the insulating elements. You can see how this is done in the photo and video.

main feature Izospana B- vapor tightness. The structure of the coating varies depending on its purpose. The side that will be mounted to inside thermal insulation - smooth. And the part that will be facing the room has the smallest fibers. These villi will retain moisture. It is used for protection interior walls, insulated roofs, floors, interfloor or attic floors.

Reviews indicate that Izospan S is in many ways similar to the previous version, but is more reliable. Therefore it has a higher price. It is based on a super-dense polypropylene sheet that can effectively protect structural elements from capillary moisture, steam, and condensation. This type of product is used to protect “cold” type roofing, frame walls, floors in wet areas. This material is capable of insulating building construction from negative impact atmosphere, even from snow in places where roofing elements are not tightly joined.

Specifications Izospana D allow us to classify it as a universal variety, capable of protecting both from internal and external influences. It is used in the construction of flat and pitched non-insulated roofs, floors, foundations, and basement floors. It is particularly durable and UV resistant.

Technical characteristics of Izospan

Vapor-permeable waterproof and windproof membranes Izospan:

Vapor-permeable waterproof and windproof Izospan membranes with fire protection:

Vapor barrier waterproofing films Izospan:

Vapor-tight reflective thermal insulation, waterproofing and vapor barrier materials Izospan:

Reflective insulation Izospan on gas-foamed polyethylene foam NPE:

Technical characteristics of Izospan mounting tapes:

Features of new varieties

Relatively new developments are varieties such as R.S. And R.M.. The difference between these films is that they are reinforced with polypropylene mesh. This makes it possible not only to serve as protection against steam and moisture, but also to withstand tensile stress.

Stamp materials FS, FD, FB And FX supplemented by the ability to use infrared radiation to enhance thermal insulation. This is a great opportunity to develop energy saving. But they have drawbacks. These varieties do not allow for the passage of steam, so they can only be installed in rooms with mechanical ventilation.

Izospan is a film-type insulating material. It ensures the preservation of the original qualities of thermal insulation and is used in the most different areas. Therefore, it is worth considering in detail its advantages and disadvantages, and also learn how to properly install the material on walls, roofs, and foundations. This and much more will be discussed further.

Types and their properties

Thermal insulation keeps the house warm when it's cold, adds comfort when it's hot, and prevents the rooms from blowing out. However, he himself thermal insulation material needs protection from negative atmospheric phenomena. Such protection is provided by a polypropylene membrane - Izospan.

Such a fabric will successfully play the role of protection for thermal insulation. Despite its simplicity, this film material has differences: type A, type B, type C, type F, others. Each type has differences in technical characteristics.

The film complies with construction GOST and has the following general qualities, which are confirmed by the manufacturer:

thermal conductivity;
density;
waterproof;
elasticity;
resistance to negative influences;
UV resistance;
environmental Safety;
Fire safety.

The properties of Izospan correspond to the classification of products. Classification is the letter indices that manufacturers use to designate the material they produce. Sometimes on sold samples you can see a combination of letter indices. Each new designation expands the possibilities of using the material. The performance qualities of any Izospan are high.

The material is widely used in the construction field. It is used for vapor barrier of both residential and industrial buildings. The properties of Izospan comply with sanitary and epidemiological standards. The material is supplied with fire safety and technical certificates.

In the production of Izospan, polypropylene is used. The base is melted down and then rolled out to a certain thickness using special rollers. The material turns out to be of a homogeneous structure and dense. The material is considered double-sided, and both surfaces of Izospan perform different functions.

If you lay the vapor barrier correctly, all the moisture will remain on the film, and it will condense on it. While on the film, the moisture will evaporate and will not harm the structures.

Today Izospan has received recognition as efficient material insulation of attics, garages, walls of private houses.

The properties of the material will protect the metal coating from corrosion and the wood from rotting. The material prevents the penetration of air flows and will not release heat outside. When choosing products, you should focus on the quality of the main modifications, each of which has its own characteristic features.

Izospan A plays the role of an excellent waterproofing agent. This modification also protects the insulation well from wind and water, thereby increasing its service life. Izospan A is suitable as an insulator for any premises, as it is resistant to mechanical stress and neutral to mold and fungi. The film stretches longitudinally by 19 cm, and crosswise by 14 cm. The material is used as an additional barrier and is attached to the outside of the insulation. Wooden slats and nails are used to secure the membrane.

Izospan B– an excellent vapor barrier that will eliminate increased humidity indoors. Double-layer Izospan B can be used on roofs, internal and external walls, on the floors of the attic. The material stretches longitudinally by 13 cm, and transversely by 10.7 cm. Unlike the previous modification, Izospan B is installed inside the insulation, secured with an overlap, taking into account the presence of free space between the layers.
Izospan S– two-layer, known as good protection for roofs, frame walls, and concrete floors. The membrane is fixed to the insulation, overlapping, wooden slats. To insulate the floor, it is laid directly on the surface.
Izospan D– very durable, known as roofing protection in terms of waterproofing. In addition to roofs, Izospan D is used to cover concrete floors at the basement floor level. Material is mounted horizontal stripes, secured with wooden slats. In addition to the main modifications, there are additional varieties of Izospan, the purpose of which is worth considering in more detail.

Purpose

The variety of materials in the Izospan line is wide. In addition to basic materials, you can find related products on sale, namely adhesive tapes and adhesive tapes.

If connecting tape SL Fix the hydro- and vapor barrier strips together to ensure better tightness of the connecting seams. Installation with connecting tape is carried out at moderate temperature conditions, and the surfaces to be joined must be dry and clean.
FL tape You can connect the canvases and repair minor damage. This is a metallized tape with excellent durability. The wear and tear strength of this tape is also high.

Unilateral Scotch tape ML characterized by high-quality adhesion. The Proff modification material proved to be especially effective difficult cases, as it helps in joining uneven surfaces, different reasons, for example, brick and concrete, porous surfaces. Izospan ML allows you to glue plywood, wood and plaster surfaces together. The material ensures better connection of pipes and windows to window openings.
Izospan KL allows you to glue two panels together. Well seals the overlap points of the material. Izospan KL is glued to the upper edge of the insulated panel, paper side up. It is pressed against the bottom sheet with a slight movement of the hand at a certain distance from the edge. Then the paper side is removed from the tape and both edges are pressed against each other. Installation of the material is carried out on clean, dry sheets at positive ambient temperatures. The basis of the adhesive layer is water-dispersed modified acrylic. Izospan KL does not contain solvents.

Waterproofing is applied according to general instructions for ceilings, walls, and subfloors.

The work associated with laying the membrane is simple and does not require special qualifications.

Regardless of the installation location, the smooth surface of the film should always face the thermal insulation. Incorrectly laid sheets will not add to the effectiveness of insulation, and the structure will not achieve a vapor barrier effect. Each type of product is accompanied by instructions. Its strict observance will not allow you to make mistakes in your work.

Lay the material tightly to the surface with a slight edge in the corners. Place the canvases with an overlap, the size of which should be about 15 cm. If the membrane is attached to wood components, you can use furniture or construction stapler. Seal the resulting seams with tape or tape.
If a reflective film is mounted, then it must be installed with the metallized side facing the inside of the room. Laying must be done without overlap, end-to-end. Cover the joints with adhesive tape.
If you are performing a vapor barrier on an insulated roof, then lay the film from below. Lay out the appropriate canvas horizontally, tightly to the rafters, avoiding windage. Wooden slats 4 x 5 cm wide, treated with an antiseptic, are suitable as film holders. This lathing will ensure free evaporation of condensate.

General form system will be as follows:

interior decoration;
Izospan B, C;
rafters;
insulation;
waterproof membrane;
roof covering.

Vapor barrier of internal partitions of the house is needed if the interior floors are framed.

In this case, Izospan V can be installed on any side of the wall. A stapler or special nails are used for the work. Izospan should be laid horizontally, starting from the bottom. Izospan is fixed with slats, and Izospan A can be mounted on the other side of the wall. General form:

finishing;
rail;
vapor barrier;
frame;
insulation;
moisture protection;
rail;
finishing.

Izospan can be used as a vapor barrier for interfloor ceilings.

The material is laid on the rough base of the ceiling with the rough side down. If the membrane is spread on the floor joists, above the insulating layer, then the smooth surface should be laid upward. Clearances required:

Between the insulation layer and the vapor barrier layer.
Between floor finishing and vapor barrier.
Between the ceiling finish and Izospan.

General form:

ceiling finishing;
slats;
vapor barrier;
rough floor construction;
beams;
insulation;
vapor barrier;
slats;
floor finishing.

Like any building material, Izospan has its pros and cons. Let's take a closer look at the technical advantages and disadvantages, as well as consumer reviews.

Advantages and disadvantages

Main advantages of the material:

Lasting. Izospan does not tear during installation and has a long service life.
Reliable. When laying the material, other materials will remain dry in the most negative conditions.
Universal . The material can be used on any type of structure when installing any insulation.
Environmentally friendly. The film does not highlight harmful substances in atmosphere.
Practical.
Fireproof.
Convenient to install.

Izospan perfectly evaporates accumulating condensate, significantly improving the characteristics of the insulation. The walls remain dry, so fungi and mold do not appear on them.

Among the disadvantages of Izospan, it is worth noting the need for mandatory processing wooden structures antiseptic agents.

There are other disadvantages:

if the insulation technology is violated, condensation may form at the joints of the material;
vapor barrier rolls cannot be installed immediately; they must be kept in a warm room;
the vapor barrier process is impossible if phenomena such as fog or rain are observed;
When installing Izospan on a concrete basement surface, it is recommended to warm it up using heat guns.

Consumer reviews of the material are generally positive.

For example, users write about the qualities of Izospan S that work with it can be carried out simultaneously with laying the cake. The material allows you to save on installing the sheathing. The thermal insulation is in good condition after two years. There is no heat loss or appearance of wet spots.

Another user notes characteristics of Izospan AS. One of the advantages is the high speed of installation. The material also has disadvantages - it is thin, the canvas breaks during fixation to the frame. In addition, for this type of material it is difficult to determine right side styling, since both of them are smooth.
In contrast to this, FB series variant easier to determine. Users note good roughness on the correct reflective side. However, the material is expensive, since its width is non-standard. The investment pays off in future use.
Sides of Izospan B are also easy to identify. The smooth side of the material must be mounted to the insulation. The vapor permeability of the material is high, the cost is quite justified.

Features of use

The sides differ in appearance and to the touch: one is smooth, the other is rough. It is believed that Izospan should be laid with the smooth side facing the insulation. The rough side of the film should touch the insulated vertical. The roughness of Izospan effectively absorbs condensation. Without a vapor barrier, condensation will always flow down to the floor structures. Condensation harms both wood and concrete foundations. Let's look at some special species vapor barriers Izospan more details.

FB series vapor barrier used in interfloor wooden floor, for walls inside steam rooms, saunas. The FB series is based on kraft paper and metallized lavsan. Features of structured Izospan allow you to effectively reflect thermal energy. There is no need to attach the FB series to the outside, since the material perfectly withstands temperatures with dry steam up to 140 degrees.

Strength characteristics The material is excellent, it is environmentally friendly.

The use of Izospan can reduce heat losses in the steam room. The same vapor barrier will prevent dampness from entering the wall structure.

Izospan FB roll sizes:

width – 1.2 m;
length – 35 m.

The material can be used in the temperature range from -60... +140 degrees. The technical characteristics of the material comply with GOST. Performance may be degraded by exposure to UV radiation.

Materials from the following series have similar characteristics: FD, FS, FX. These are vapor-permeable membranes that prevent water vapor from escaping into the atmosphere. The materials are waterproof, water-resistant, and have an energy-saving effect. The materials are able to reflect infrared thermal radiation and protect floors from steam. The use of vapor and waterproofing allows you to reduce the period of warming up the room and provides significant savings on heating the room.

Izospan AS series it is at the same time waterproofing, vapor barrier, and windproofing. The membrane has three layers, protects against gusts of wind, moisture from external environment insulation, roofing elements, walls. Izospan AS series can be mounted on insulation without a ventilation gap. As a result of using the series, expenses for lathing between the insulation and Izospan are eliminated.

The membrane is diffusion and has shown good water resistance and hydrostability. The use of this film has a positive effect on increasing the service life of the entire structure.

The material is produced in rolls 1.6 m wide and 70 m long. The effects of UV radiation, as in the previous version, reduce the quality characteristics of the material. Primordial technical qualities comply with GOST.

The AM series membrane has similar characteristics. The material combines the characteristics of water resistance and vapor barrier.

The scope is quite wide:

insulated sloping roofs;
frame type walls;
walls with external insulation;
ventilated facade;
attic floor;
internal verticals.

Separately, series A film with OZD can be used for ventilated facades. This vapor-permeable membrane will protect the façade elements from wind and precipitation. The film will not allow vapors to escape from any type of insulating material. Film width 1.6 m, roll length 70 m.

Separately, the RS series material can be used as a roof vapor barrier. The film is suitable for non-insulated structures. She will protect wooden elements from the action of condensation, from penetrating atmospheric phenomena. How is a vapor barrier suitable for flat designs roofs

Another type of film that is suitable for uninsulated roofs is Izospan RM. Three-layer material with reinforced mesh made of polypropylene. In addition to protecting roof structures, it can be used to protect genitals. concrete floors. In this case, it acts as a waterproofing layer.

Which to choose?

If a material is selected as a vapor barrier for a roof, then the following points are taken into account:

temperature phenomena at the location of the building;
purpose of the roof (operational, non-exploitable);
roofing pie design.

The vapor barrier layer, first of all, must be completely sealed. This quality is very important for such materials. Self-adhesive connecting tape or tape is not in vain recommended for sealing seams.

If a vapor barrier is selected for a bathhouse, it is desirable to minimize the possibility of fire, therefore FD, FX, FL Termo, foil vapor barrier are the most suitable options for similar structures.

It is important to take into account that the bottom layer of the roofing cake must be non-flammable. The fire resistance of a bathhouse roof will be increased if the vapor barrier film is laid so that its edges extend beyond the insulation. Experts advise gluing the membrane to the wall and additionally securing it with galvanized strips.

Unlike roofing felt and glassine, Izospan – modern material new generation. The diffusion film has lower vapor permeability in comparison with the membrane discussed in this article: it can be used for both hard and soft roofs.

Diffusion membranes usually consist of several layers. The product combines polypropylene fabric and polyethylene laminate. The cost of this type of vapor barrier is quite high.

However, other analogues also have advantages and disadvantages. For example, types such as roofing felt and glassine, have low cost. However, today few people will use roofing felt for vapor barrier of the roof of a residential building. This is a material for household use. Glassine is also not used as the main hydro- and vapor barrier.

The utilization rate of bitumen membranes is also low. This material is used to vaporize concrete roofs. This type is mounted by heating and then gluing to the base. Main disadvantage material - heavy weight.

Almost all of the above types of materials are combined with Izospan, which is presented on the market in 14 varieties. Class A of Izospan alone combines several film options, for example, AS, AM, with different strength, density and vapor transmission ability.

RS series of Izospan is a unique, universal product that can completely replace all materials together. The material is indispensable in many construction fields, as it has increased strength and does not harm interior decoration. The sealing reinforcing mesh made of polypropylene will prevent the formation of harmful fungi and mold, as it creates an additional protective layer for both the material and the structures.

The length, thickness, weight, and number of meters per roll vary depending on the class of the material. The division looks like this:

First grade

Izospan A

width, m - 1.6
size, m² - 35, 70

Second class

Izospan B

width, m - 1.6
size, m² - 35, 70

Izospan S

width, m - 1.6
size, m² - 35, 70

Izospan D

width, m - 1.6
size, m² - 35, 70

Izospan DM

width, m - 1.6
size, m² - 70

Third class

Izospan FS

width, m - 1.2
size, m² - 70

width, m - 1.2
size, m² - 35

width, m - 1.2
size, m² - 70

release:
width, m - 1.2
size, m² - 36

The indicators of different manufacturers are generally the same. Let's talk in more detail about the most famous suppliers of this building material and user reviews.

Well-known manufacturers and reviews

Positive reviews received by the following manufacturers vapor barrier films, which can be installed indoors:

Ondutis;
Izospan B;
Izospan D;
Delta Reflex;
Delta Luxx;
Tyvek AirGuardSD5;
Tyvek AirGuard Reflective;
Stroybond V;
Izobond V.

Well-known manufacturers of water vapor barrier, which are also characterized by positive side and became widespread as temporary roofing:

Ondutis RV;
Ondutis RS;
Izospan D;
Stroybond D;
Isobond D.

Ondutis a100;
Ondutis a120;
Izospan A;
Izospan AM;
Izospan AS;
Delta Vent N;
Tyvek soft;
Tyvek solid;
Stroibond A.

It is widely believed that the properties of hydro-vapor barrier films are better than those of simple vapor barrier materials. Users note the durability of Italian reflective films.

Laying method

It is necessary to lay any vapor barrier on any type of roof after laying the insulation. It can be placed under corrugated board.
Waterproofing can be laid in any direction.
If the material is laid along the rafters, the overlap should be directly at the level of the rafters. At these same points of contact, the material must be carefully fixed.
At points of contact with water pipes that may pass through the roof, the membrane is folded down, wrapped around the pipes and carefully taped.
Some types of materials require a mandatory air gap. To create this space, thin wooden planks are enough. They are located at a distance of about 50 cm from each other.

General rules Installation of the film requires strict adherence to the instructions for use. Laying technology on vertical and inclined surfaces should be done from top to bottom. The film strips should be laid horizontally correctly. The film must be laid with an overlap of at least 15 cm. The joints must be taped with adhesive tape for reliability. If the wall is finished with plasterboard, the film should be laid with the rough side facing the plasterboard and the smooth side facing the insulation.

When laying a vapor barrier on the roof Izospan can be fixed directly to the rafters. For fixing, bars or thin ones are suitable clamping bars. Finishing: plasterboard, plywood, lining, etc., mounted on top of the vapor barrier. If bars were used for fixation, the trim can be mounted directly on them. A gap forms between the film and the finish. Ventilation gap will ensure better drying of condensate.
If Izospan used for insulating walls indoors, then first you need to secure the bars vertically. If plasterboard is used as finishing sheathing, then a metal frame will do. After this, insulation is installed: mineral wool or polystyrene foam. A vapor barrier is attached to the bars using slats or a stapler. The next step is to install the final finish.

If the walls are insulated from the outside, the procedure should be reversed. First you need a sheathing of bars. Then a vapor barrier is attached to this structure. Next comes the heat insulator, and on top of it is a waterproofing film. The final stage will be the installation of finishing.
If a vapor barrier is used for the floor, first you need to lay waterproofing between the joists. Then the insulation is installed. A vapor barrier is mounted on top of the insulation. Bars are suitable for fastening it. Floorboards are installed on top of the vapor barrier.
When installing an interfloor ceiling the previous steps are practically repeated. If necessary, a vapor barrier can also be installed on the ceiling from below. The ceiling trim is mounted on top of the vapor barrier.

If the vapor barrier is damaged during installation any structural elements or torn areas must be repaired. To do this, you can use adhesive tapes or special glue. The material is very reliable in installation and is more expensive than usual polyethylene film. However, the quality characteristics of Izospan significantly exceed the quality of the film.

The following tips will help you get the job done well.

When laying any vapor barrier materials, ensure the quality of the joints. If they are poorly glued, the ceiling usually sweats, and the effort from the work done is practically reduced to zero.
The easiest way to seal any hole in the membrane is with a special sizing tape at least 10 cm wide. A narrower tape will simply come off.
Leave folds of material 2-3 cm wide around windows and other openings, especially if the building is new. In this case, deformation reserve must be provided.
If a vapor barrier membrane is installed around skylights, then it must be protected from the inside with a special finish.
If the membrane needs to be fixed on a rough surface brickwork, wood, better to use adhesive compositions with acrylic or rubber base.
Polyurethane-based adhesive tapes are not recommended for use by specialists. It is believed that due to insufficient adhesiveness, they move away from the base over time.

For information on the use of Izospan, see the following video.