When building an energy-intensive house, the main task is to provide effective thermal insulation. There are many types of thermal insulation materials that allow you to do this. But sometimes it alone is not enough to successfully solve the problem. It can retain heat well inside the house in stable conditions - with moderate humidity. But when the weather outside changes, the temperature drops and humidity rises, and at the same time, the effectiveness of thermal insulation decreases, since without special protection, its humidity also increases. Therefore, to achieve this goal, other materials are also required to protect thermal insulation and various room structures from the negative effects of moisture. One of these materials is Izospan.

What is Izospan - what is it for?

Izospan is now widely known in the Russian building materials market, it is a domestic brand manufactured in the form of a membrane film, it has a wide range of applications. It is an excellent means of protecting against moisture acting, both from the outside and from the inside of the room.

Characteristics of Izospan

Izospan is an effective protective agent against moisture of any type: water, steam, condensate, etc. It can be of different types, depending on this, some types are used to protect the insulation in the roof, others are used to protect the structure of the cold roof. In addition to all this, it serves as a good waterproofing for walls, in interfloor ceilings, on basement floors - in concrete and other moisture-absorbing floors.

There are several varieties of it, each of which has its own functional affiliation.

What is Isospan

Types of isospan and technical characteristics

Izospan can be divided into four large groups - A, B, C, D, each type has its own characteristics in the design, which determines their functional purpose

Izospan category A

The design of this category has effective moisture-proof properties, and also allows for protection from the wind. The main task is to protect the heat-insulating layer of the house from the outside. The structure of the membrane is as follows - the surface is smooth and does not allow moisture to pass through. The inner side is porous, which allows you to effectively remove the accumulated moisture from the side of the insulation. The material is mounted on the outside of the insulation layer, under the roofing material or, if it is a wall, then under the facing material.

When used on a roof, according to technical recommendations, the angle of inclination should be at least 35 °. It should also be noted that laying it should take place in the absence of precipitation.

Technical characteristics of Izospan A

• Compound: Propylene 100%
: 190/139 N/5cm
• Vapor permeability, not less: 3500 g/m2/day
• Water resistance not less than: 330 mm water column,
• Application temperature: -60 to + 80 0 С
• Dimensions: Width 1.4 -1.6 m,
• Square: 35;70 sq.m

Izospan A - photo

Izospan category B

This type has a two-layer design, the upper layer with a smooth surface, the lower one without roughness - it retains drops of condensate and contributes to their rapid evaporation.

Izospan V protects internal building elements from water vapor emanating from inside the room. It is laid on the inside of the room on the insulation, suitable for both walls and roofs, and can be used in ceilings.

Specifications Izospan B

• Compound: Propylene 100%
: 130/107 N/5cm
• Vapor permeability m2 hour Pa/mg, not less than: 7.0
• Water resistance not less than: 1000 mm water column,
• Application temperature: -60 to + 80 0C
• Dimensions: Width 1.4 -1.6 m,
• Square: 35;70 sq.m

Izospan B photo

Category C

This type allows you to effectively protect the internal structures of buildings from steam, condensate. The structure is similar to the types described above, great for steam and waterproofing of any type of roof, including flat ones. Used to protect wooden structures in cold type roofs (also suitable for insulated roofs).

Izospan C is also used in cement-concrete screeds in basements and in the foundations of any wet rooms.

Wind-moisture protective vapor-permeable membrane

"Izospan A" is used to protect against wind and condensation of the internal elements of roofs and walls, insulation in buildings of any type. This material is mounted on the outside of the insulation under the roofing or outer wall cladding. On the outside, the isospan vapor barrier film is made of a smooth water-repellent surface, and on the inside it has a rough anti-condensate structure designed to hold condensate drops and their subsequent evaporation in the air stream. This material protects the insulation and the structure from the penetration of condensate from the environment, ensures the weathering of water vapor from the heaters.

When using Izospan A, the heat-shielding characteristics of heaters are significantly improved, and the service life of the entire structure as a whole is extended. This material is made from modern polymers and has a number of advantages over other materials:

• Preservation of properties for a long time
• Environmental safety - "Izospan A" does not emit substances harmful to human health
• Ease of use
• High mechanical strength
• Resistant to bacteria and chemicals

Areas of application of Izospan A materials

In insulated roof structures with different coatings (from profiled sheets, metal tiles, natural tiles, soft bituminous tiles, etc.), having an inclination angle of more than 35 °, Izospan A is used as an under-roofing wind-moisture protective membrane. It is installed under the crate on top of the rafters above the insulation for additional protection from the wind, as well as protecting the load-bearing elements and insulation from roofing condensate.

• Roofing
• Isospan A
• counter rake
• insulation
• Vapor barrier Izospan V
• Rafter
• Interior decoration

Attention: Izospan A material is not used as a temporary roof!

In the construction of the walls of buildings with external insulation, Izospan A is installed under the cladding of buildings on the outside of the insulation. The material protects the outer walls of low-rise buildings made of panel, combined, frame structures and timber from the effects of wind and atmospheric moisture in all cases of using external cladding (siding, lining, etc.) when insulating walls from the outside.

Timber wall

• outer skin
• counter rake
• Isospan A
• insulation

frame wall

• outer skin
• counter rake
• Isospan A
• insulation
• Vapor barrier Izospan V
• Interior decoration

Izospan A is also used to protect heaters in the structures of ventilated facades of buildings with a large number of storeys with external insulation. It not only contributes to the evaporation of moisture from the insulation, but also protects the insulation from the effects of cold air, snow, atmospheric moisture, winds that penetrate under the outer lining through a ventilated gap.

• decorative trim
• Isospan A
• insulation
• Elements of the mounting system
• Bearing wall

Installation instructions for Izospan A materials

When installing insulated roofs, Izospan A is rolled out and cut over the insulation directly on the roof rafters (Fig. 1-2). Installation is carried out by overlapping horizontal panels, starting from the lower area of ​​the roof, with the smooth side outward.

At vertical joints, the overlap of the panels should be at least 20 cm, and at horizontal joints - at least 15 cm. In the area of ​​the roof ridge between the panels, a ventilation gap of 5 to 8 cm should be left. The material is stretched and strengthened with the help of wooden antiseptic counter-rails (3 by 5 cm) on self-tapping screws or nails directly on the rafters. Solid plank decking or grating (determined by the type of roofing) is mounted on counter-battens. Between the insulation and the moisture-proof membrane, a ventilation gap of 3 to 5 cm should be provided for the weathering of condensate; between the roofing and the membrane, the gap should be the thickness of the counter rail (from 3 to 5 cm). It is necessary to fix the material in a taut state, the sag between the rafters should be no more than 2 cm. In order to prevent a decrease in the waterproofing properties of Izospan A, it is necessary to exclude contact between the material and the insulation. The lower edge should allow moisture to flow naturally into the gutter from the membrane surface. The under-roof space must be ventilated for free weathering of condensate and steam. In the lower part of the roof in the ridge area, ventilation holes must be provided for free air circulation.

You should be careful that "Izospan A" is not used as the main roofing, in order to provide temporary protection of building structures during installation, "Izospan D" or "Izospan C" should be used.

During the construction of walls with external insulation near low-rise buildings (Fig. 3-4), it is necessary to mount Izospan A on top of the insulation on a wooden frame, starting from the bottom of the wall. The panels should be placed with the smooth side outward horizontally, overlapping with an overlap along the vertical and horizontal joints of at least 10 cm, fixed with galvanized nails or a construction stapler on the frame. On top of the coating, it is necessary to fasten wooden counter-rails that carry the outer skin (siding, lining, etc.). Between the outer skin and the membrane, it is imperative to provide a ventilation gap of 3 to 5 cm (for the thickness of the counter rail). The lower edge of the membrane should facilitate the removal of flowing moisture to the drainage drain of the basement of buildings.

When installing "Izospan A" in the construction of ventilated facades of buildings with a large number of storeys, the material must be placed with the smooth side outward over the insulation on the inside of the ventilated gap. Installation must be carried out according to the type of external cladding and the installation system used. In any case, the material should fit snugly against the insulation, be firmly attached to the elements of the mounting systems, have no loose areas and sags, since this leads to acoustic “pops” when exposed to sharp wind loads inside the ventilated gap. The layout of the material panels should contribute to the natural drainage of external moisture that penetrates under the lining

One of the protective layers used in the process of insulation is a vapor barrier. It implies the presence of good protection of buildings and structures from the effects of condensate and a humid environment. Such layers provide a longer service life for buildings in general and personal elements in particular. Isospan A is widely used for similar purposes, the technical characteristics of which allow for maximum protection.

Many manufacturers are engaged in the production of similar products in the form of a quickly mounted membrane film and all kinds of multilayer sheets that cover walls, ceilings, ceilings, and roofs. The methodology for using the funds may differ slightly depending on the operational parameters of the product.

Membrane Specifications

The manufacturer's membrane material is marked by the manufacturer in such a way that each type of Izospan is used exclusively for its intended purpose. At the same time, the entire range of products is designed to protect structures from precipitation, wind and condensate that forms inside the premises.

The production of non-woven fabric is carried out on CNC machines with mandatory quality control at each stage of production.

The branded membrane has a number of certificates and certificates:

• hygiene certificate;
• fire certificate;
• certificate of conformity to SNiP and GOST;
• quality control certificate.

Izospan insulation today has no analogues among Russian manufacturers in terms of scope and quality, which is confirmed by the GOSTSTROY certificate.

Product range

The following varieties are on sale:

It is a permeable membrane that is used to protect the walls of the room and the roof from condensate formed due to temperature changes. The resulting evaporation of the liquid among several layers adds to the resistance of the covered materials. In the roof of such an Izospan, positive characteristics are shown when the slope of the beams is not more than 40 degrees. The price of a roll is 35 sq.m. 766 rub.

It is presented in the form of a two-layer vapor barrier sheet, used exclusively inside buildings and structures. A brand of this density is able to effectively protect the attic or attic, and is also in demand for the roof, all kinds of basement levels, walls and in the form of an additional insulating layer. Layers have a high density. The price of a roll is 70 sq.m. 1087 rub.

The scope of this non-woven fabric is non-insulated roofs, it is a two-layer membrane. The characteristics of the layers are vapor and waterproofing. Can be used in attics. 1649 rub. 70 sq.m.

The technical characteristics of the material are very versatile, it can be used in different areas. Suitable not only for hydro-, but also vapor barrier of floors between floors, concrete bases, roofs that are not insulated, for finishing foundations. 35 sq.m. costs 535 rubles.

Unlike Izospan A, the technical characteristics are higher, since the membrane film of the special material is high-strength. The structure contains materials that increase protection against all kinds of mechanical damage. Laying is carried out directly on top of the heat insulator, which helps to protect against weathering and condensate droplets. The price of a roll is 70 sq.m. 2323 rub.

Endowed with special features. One of the layers is kraft paper, which on the one hand is metallized with a material such as lavsan. This ensures both steam and waterproofing Izospan. For such qualities, the structure is in demand for flooring on pitched roofs. It is also used to create thermoconstant wet conditions for baths and saunas. Although such a texture has a rather high price tag compared to analogues, it can be absolutely indispensable for certain purposes.

Non-woven fabric is made from kraft paper, followed by coating with metallized lavsan. Due to such processing, the material withstands temperatures in the range of -60° ... + 120°С and is used for heat and vapor barrier of walls, floors and ceilings in steam rooms, baths, saunas, hamams and other similar premises. 1056 rub. costs 35 sq.m. films.

This variety is made from a polypropylene film and a metallized layer of lavsan is also applied. In the FD variation, vapor barrier film D is used as the base, and in FS - B. And although the strength of the canvas is beyond doubt, it is recommended to use it for vapor barrier of structural elements from the inside, including for steam rooms, attic and attic floors, as well as heat-reflecting screen in pairs. 1987 rub. roll 70 sq.m.

Foamed polyethylene covered with a metallized layer acts as the base layer. Due to the abundance of air bubbles, isospan is used as sound insulation, as well as a heat-reflecting screen, for which lavsan is responsible. Compared to other options, this canvas has the most advantages, but due to the fact that it is based on foamed polyethylene, the maximum operating temperature does not exceed 90 °. It can not be used for finishing walls, floors and ceilings in rooms with elevated temperatures.

It is much more effective to use FX as an underlay for underfloor heating, for wall cladding behind radiators to reflect heat, and as insulation in residential areas in combination with finishing materials.

FX has a zero vapor permeability threshold, so it is not allowed to be used in this segment. Cloth 2 mm thick with an area of ​​36 sq.m. will cost 1566 rubles.

VIDEO: Application of vapor barrier membranes

Installation instructions

In the process, some preparation will be required. You will need to stock up on a set of tools and materials. You will need wooden slats, and self-tapping screws to them. Cutting of blanks is carried out with well-sharpened scissors. The joints are hidden with adhesive tape, and a construction stapler is used for fixing.

The metal profile is involved in the calculations. The required area is calculated taking into account the overlap on both sides. Usually 15-17 cm are allotted for this.

The material "Izospan A" is not intended for use as the main roofing

Apply Izospan of the required brand according to a specific algorithm based on important rules:

• All fasteners are recommended to be carried out exclusively from the side of the room. It is possible to work with sheets at a temperature not lower than -25 °C. It is allowed to roll out the protection both from the outside and from the inside. If you need to work with the roof, then only the inner layer of the “pie” is in demand.

• The vapor barrier is fixed with a construction stapler along the perimeter of the walls. Subsequent sheets are superimposed on the previous ones by 150 mm, while the seam is glued with adhesive tape. Material tension is not allowed, slight sagging is provided. The finishing operation can be the final attraction of the sheets with wooden slats to the walls, roof or rafters.
• For the laid rails, you should choose a step from the interval of 30-50 cm. After punching them over the entire area, you can mount the selected Izospan on top. The formed ventilating pocket provides fast evaporation of excess moisture.
• Vapor barrier sheets can be mounted on a specially designed frame on the walls of the room. For the base, metal / wooden slats are used, fixed on the walls with self-tapping screws. All joints must be sealed with tape.
• The ventilated insulated facade is treated twice with similar protection. The first crust is placed behind a layer of insulation, the second crust is placed in front of the insulation. Accordingly, a three-level thermal and vapor barrier system with a high degree of efficiency is formed.

It must be taken into account that for reinforced concrete structures, the use of vapor barrier is mandatory both for walls and for floors / ceilings.

Features of using a popular brand

Due to its individual properties, each material is in demand in various operating conditions. You should rely on their physical characteristics in order to choose the right coating.

A feature of the material with the mark "A" is high tensile strength. Its outer side has a smooth structure that is not able to absorb or pass water. The inner surface is with a rough anti-condensate texture. On it, drops are easily held and then evaporate into space.

The main objective of the material is the high-quality protection of the insulation and the entire structure from the ingress of condensate from the outside. Grade A is based on modern polymeric structures.

The main advantages over analogues are:

• excellent mechanical strength;
• high degree of environmental friendliness, since no harmful substances are released into the atmosphere;
• for a long period does not lose its high characteristics;
• resistant to chemicals, neutral to bacteria.

Due to its resistance to ultraviolet radiation, it is actively used in the processing of roofs, attics, plinths. Density is reached 110 g/cm3. Usually sold in fifty-meter rolls, whose width is 140 cm.

It should be borne in mind that grade "A" is usually laid as the main material, in contrast to "C" or "D", which are recommended by the manufacturer for use in temporary protective structures.

For ventilated facades of a multi-storey building, Izospan A is placed on top of the insulation so that the smooth side remains outside, and a ventilated gap is provided inside. It is necessary to ensure maximum adhesion to the insulation and did not have unfixed areas. Otherwise, acoustic pops will form due to increased wind loads. Cloths should provide drainage of excess moisture.

VIDEO: Installation example

Every modern building cannot exist without a heat-insulating layer. However, this layer itself requires protection. Vapor barrier materials come to the rescue, for example, Isospan A.

Initially, we determine whether vapor barrier is important for walls and roofs? Undoubtedly. It will allow you to save the insulation of the roof, walls. Waterproofing is used on floors and partitions that are exposed to all kinds of climatic changes.

There are the following types of vapor barrier materials:

• Standard film. It helps to protect against condensate, which may appear on the inner surface of the walls, roof, insulation.
• Membrane film coating. These materials remove excess moisture and fumes from the premises. In addition, there is its subspecies, which has the property of variable vapor permeability, which increases in proportion to humidity.
• Foil coated with aluminum. Performs the functions of steam and heat insulation due to the reflective properties.
• roofing membrane. Resistant to temperature extremes and UV radiation. Differs in high indicators of durability.

Izospan A and "with what it is eaten"

Izospan is an innovative building material that performs well in the construction of many modern buildings. Excellent protection of insulation and structures from climatic influences - these are the main qualities that provide Izospan with credibility in the construction business.

The technical features of Izospan A vapor barrier include:

• material strength;
• Elasticity;
• environmental safety;
• High protection against mechanical influences.

Isospan is divided into four types: A, B, C, D. This article focuses on the first variation of this product.

Films of group A are used to protect the outside of the premises.

The letter "A" on the material indicates that we have an ordinary film of this group, without any modifications. Technical characteristics of Izospan AM and AS differ in that they are made of three layers, which allows you to increase the level of protection of buildings. In addition, fire-resistant films are also present in this group of materials.

Izospan A with OZD (with flame retardant additives) is a waterproofing film that not only protects against the effects of air masses, but also from accidental fires (during welding, with careless handling of fire).

Izospan A is used as a kind of membrane, which is caused by the waterproofing properties of the material. This film protects the roof, facades and walls of premises of any type. Due to its wind and moisture protective function, this film will help keep the insulation in excellent condition for a long time. The film itself has been on the market for about 12 years, and has many positive reviews.

The use of Izospan is possible at all stages of construction. It will perfectly protect the roof, which is constantly exposed to warm and cold air masses.

Izospan A - technical specifications

Despite the fact that Izospan is divided into several categories, the latter are also divided into several modifications. For example, the following is the difference between individual variations of Isospan A: Isospan A (density 110 g / m²), Isospan AM (density 90 g / m²), Isospan AS (density 115 g / m²), Isospan AQ proff (density 120 g / m²).

Vapor barrier Izospan A, the technical characteristics of which are indicated by the manufacturer:

• Tensile strength of the material: 190/140 millimeters;
• Stability when exposed to ultraviolet radiation: 3-4 months;
• Water resistance: 300 millimeters;
• Vapor permeability: not less than 2000.

Instructions for use Izospan A

Instructions for the use of this material begin with the question of many builders: “Which side to the insulation should Izospan A be laid?”.

Vapor barrier Izospan A is mounted on the outside of the insulation.

Before starting work on the processing of walls and roofs with film, you need to make sure that the following tools are prepared:

• metal profile and wooden slats;
• self-tapping screws;
• to fix individual sections, a construction stapler and adhesive tape may be required;
• scissors for cutting the coating;
• the required amount of vapor barrier, calculated as the sum of the area of ​​​​the surface to be covered and overlaps of 15 cm on each side;

When installing the Isospan A vapor barrier on an insulated roof, the material is cut into wide strips and overlapped. The smooth surface of the vapor barrier must remain outside. Installation of Izospan A should begin from the bottom of the roof. Izospan must not be allowed to come into contact with the insulation, as this can significantly reduce the waterproofing properties of the material.

Pay attention to whether swelling occurs during installation. This can create noise during strong gusts of wind.

Izospan A is fastened with slats using self-tapping screws. Leave 5 centimeters of free space between the sides of the insulator.

If you use Izospan A to create a wind and hydro barrier, then we would recommend that you supplement the protection with a vapor barrier. Izospan B is perfect for this. Izospan B has two layers and is used to preserve surfaces:

• Inclined roof;
• Internal walls;
• frame walls;
• Attic, basement ceilings.

Installation diagram depending on the purpose:

• Non-insulated and sloping roofs: the main structure is a vapor barrier layer - wooden flooring;
• Attic: ceiling - vapor barrier - insulation - slats - beam;
• Concrete floor: base - screed - insulating film - finishing layer.

It is worth noting that it is necessary to strictly observe all the subtleties of the operation of this material, so as not to be disappointed after. Take into account what exactly you are isolating: insulation of walls, roofs, or whether it is wagon or panel cladding. These aspects can create certain subtleties during installation.

Positive and negative aspects of Izospan vapor barrier

Like everything in this world, Izospan vapor barrier has not only positive aspects, but also negative ones. Let's start, as usual, with the good. The advantages of Isospan waterproofing include:

• This is a high strength material;
• The service life exceeds the mark of 50 years;
• Resistance to climatic influences of various kinds: evaporation, wind, precipitation;
• Safety and environmental friendliness;
• The use of Izospan A does not cause unnecessary difficulties during installation.

As for the negative qualities, this only includes the fact that the material is flammable. However, we have already mentioned Isospan A with OZD, which eliminates this problem.

How important is vapor barrier for walls and roofs?

Vapor barrier is a necessary thing for any buildings, which we tried to talk about at the beginning of the material. The Izospan A membrane is an easy and inexpensive solution to this issue, which will ensure the safety of your walls, roofing, and insulation. Many underestimate waterproofing, and this despite the fact that it significantly warms the room. In addition, they protect the insulation, which will avoid unnecessary costs for sudden repairs.

Izospan A and whose characteristics are universal, suitable in any situations related to vapor barrier. A wide range of modifications will allow you to purchase a film according to the requirements that arise during the repair work.

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

• Izospan A membranes that protect against water and wind. They are widely used in roofing and facade work as protection of roof structural elements, as well as the inside from atmospheric precipitation. At the same time, 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 details of the roof truss system. Some varieties are flame retardant. The average vapor permeability was determined near the indicator of 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 35ºС. Mandatory requirement - installation should 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 counterpart, it is mounted indoors. After all, its task is not to allow steam to penetrate from the room into the heat-insulating layer and form condensate there. Insulation plates covered with such a membrane always remain dry, which protects them from the formation of mold and fungal colonies. Instructions for use 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 insulation 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 bills. It has a structure consisting of two layers. One layer is always smooth, and the other is rough, which keeps condensate better. The material is very waterproof, more than 1000 mm. water. Art. Its steam penetration resistance is 7.0 Pa/mg.

Technical characteristics of Izospan films:

Vapor-permeable membranes IZOSPAN
Brand	Density, g/m²	Compound		Vapor permeability, g/m²/day, not less
BUT	110	100% pp	177/129	1000	250
AM	90		110/90	850	880
AS	115		165/120	1000	1000
Steam waterproofing IZOSPAN
Brand	Density, g/m²	Compound	Breaking load longitudinal/transverse, N/5cm		Water resistance, mm water column, not less than
B	70	100% pp	128/104	7	1000
C	90		197/119
D	105		1068/890
DM	105		560/510
Reflective vapor-waterproofing IZOSPAN
Brand	Density, g/m²	K thermal reflection, %	Breaking load longitudinal/transverse, N/5cm	Vapor permeability resistance, m²hPa/mg, not less than	Water resistance, mm water column, not less than
Facebook	132	90	330/310	vapor-tight	waterproof
FD			800/700
D.S.	92		120/80
Brand	Thickness, mm	K thermal reflection, %	Breaking load longitudinal/transverse, N/5cm	Vapor permeability resistance, m²hPa/mg, not less than	Water resistance, mm water column, not less than
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 place of damage is glued with a special adhesive film.

All of these varieties, with their differences, have a number of positive, common qualities for them:

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

Next, we will consider in detail the instructions for use of Izospan B and its technical and qualitative characteristics, since it is this type of membrane that is most in demand, due to a very successful combination of consumer properties and price.

Technical characteristics of the vapor barrier Izospan B

This type includes 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 having a width of 160 cm. One roll can cover a surface with an area of ​​70 m². The density of the film is 70 g/m². These membranes are quite strong, since their tensile strength along the fibers is 128 N/cm, and across 104 N/cm.

The vapor permeability indicators are very low and are near the mark of 22.4 g / m² / day. Water resistance - 1000 mm. water. Art., which is enough. Resistance to ultraviolet rays is 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 Izospan B

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

• when covering insulation mounted on vertical or inclined surfaces, work must be carried out from top to bottom. Strips of material are fastened in a horizontal direction with an overlap of 15 cm. A special adhesive film allows you to isolate the joints;
• which side to the Izospan B insulation is placed, not everyone knows. Meanwhile, this is very critical, since improper styling completely eliminates the effect of using this material. It must be remembered that the smooth side is always placed on the insulation, and the rough side is directed into the room;

Scheme of the correct application of vapor barrier film in the process using expanded clay

• fasten the membrane to the surface to be protected using wooden bars, clamping strips and a construction stapler.

Since this vapor barrier material has a wide scope, 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.