Difference between isospan b and c. Selection of isospan tapes for different tasks

Often used in construction innovative materials. This makes the structure more technologically advanced and reduces labor and time costs. One of these materials is Izospan - new development in the construction industry. It is a multifunctional material that serves as wind protection, steam and waterproofing. The scope of its use is very diverse. But in order for it to “work” correctly, you need to know how to install the isospan.

Kinds

Izospan is presented in a number of varieties, which differ somewhat in areas of use, characteristics, and capabilities. Essentially, any Izospan is a film or membrane. The entire variety of Izospan is divided into four large groups, but within these groups there are several more types of materials. There are about 14 in total.

Benefits of isospan

The material is used to protect the insulation of industrial or residential buildings; the height does not matter. Can be used to protect against moisture different types insulation, such as mineral wool, polystyrene, polyurethane foam.

Advantages of the material:

• Strength.
• Reliability. After installation, the insulation is guaranteed to be dry.
• Versatility. Protects any insulation.
• Environmental Safety. The film does not emit any chemicals.
• Easy to install.
• Resistance to elevated temperatures. Suitable for use in baths and saunas.

Due to its structure, Izospan prevents condensation from entering the walls and insulation, protecting the structure from the formation of fungus and mold.

Tools and materials

To install Izospan you will need the following tools and materials:

1. Vapor barrier film in an amount corresponding to the area of ​​the surface to be covered with a margin for overlap of the fabric.
2. Stapler or flat slats for fixing the film.
3. Nails and hammer.
4. Mounting tape or metallized tape for processing joints.

Floor vapor barrier: instructions

Everyone knows that moisture is the enemy wooden buildings. It has a significant, sometimes Negative influence on wood. You can avoid disastrous results only through high-quality vapor barrier.

Why Izospan

The advantages of using Izospan in comparison with other methods of vapor barrier are obvious:

• on the one hand, it insulates the wood from moisture;
• on the other hand, it in no way affects the flow of air, without which, of course, the wood will not last long.

Types of Izospan for the floor

This material has gained popularity among consumers as a non-alternative option for floor insulation. Which Izospan is right for you? It’s difficult to answer definitively, but let’s imagine the varieties that are most suitable for insulating the floor from moisture.

• Izospan AM – universal remedy, which can act as insulation for both the roof and walls, and for the floor to protect insulation in unheated attics. Mounted with the white side to the insulation.
• Izospan AS is a three-layer membrane, durable, suitable for floors. It is used similarly to Izospan AM.
• Izospan B is a two-layer material that copes well with its function. The best option for vapor barrier of indoor floors.

Preparatory work before direct installation of Izospan

1. You need to start with the fact that all the boards that make up the floor are treated with a special mixture, which does not allow them to rot, attract the attention of insects, etc.
2. If the floor has already been rebuilt, then this action will need to be carried out by dismantling the floor.
3. After dismantling, it is necessary to replace especially worn materials by processing new ones according to the already announced scheme.

Laying vapor barrier

Even a non-specialist can carry out this procedure, guided by the presented sequence of actions.

With vapor barrier interfloor ceilings Izospan B is laid on top of the insulation, secured with a stapler and sealed by gluing the joints. Be sure to provide an overlap of 15–20 cm.

Note! It is worth mentioning which side Izospan should be laid if it is installed on the floor of an interfloor ceiling on top of insulation. Its rough side should be in contact with the insulation.

Why is wall vapor barrier necessary?

IN winter time year, the temperature difference in a residential building and outside reaches large values. Because of this warm air indoors, cooling, condenses on the walls of the building. If the walls are insulated, condensation accumulates on the heat insulator. As a result, the materials used get wet and their original thermal insulation properties are reduced. To prevent such cases, Izospan vapor barrier is used.

Preparing the surface for installation

1. Before installing the Izospan film, it is necessary to inspect the insulation for gaps between the blocks, and if found, eliminate the deficiencies
2. Seal the contact points between the insulation and structural elements, for example windows.

Laying isospan on walls

Izospan A is used for vapor barrier of walls both on the outside and Izospan B is well suited for the inside.

From the inside

Installing isospan on walls from the inside is not particularly difficult:

1. Insulation boards are laid in the gaps between the supporting beams.
2. Izospan B is fixed on top of them using a stapler.
3. Installation is carried out with an overlap, the joints are sealed.
4. A counter-lattice is mounted on top of the vapor barrier.
5. Finally, it is carried out finishing premises.

Installation of Izospan begins from the bottom row with horizontal stripes. The overlap of the fabric must be at least 10 cm. The material is placed with the smooth side facing the insulation. The junction of the film to the sheathing or other surface must be taped with mounting tape.

From the outside

When isolated with outside walls need to be done in reverse order:

1. On top of the laid insulation, Izospan A is attached to the beam using a stapler.
2. Installation is carried out from the bottom up with the smooth side facing out.
3. Next you need to install the counter-lattice.
4. The outer sheathing is attached on top of the counter-lattice.

This method is suitable for covering timber or boards. For log walls The vapor barrier film can be attached without installing the sheathing.

Izospan B provides double-sided protection, one side is smooth and the other is rough. It is very important to place the material with the correct side to the insulation. In any case, before installation, you should read the instructions for correct placement material relative to the heat-insulating layer, otherwise an erroneous location will lead to consequences opposite to the desired ones.

The goal of this process is to protect the building material used for the ceiling from moisture. Air humidity in rooms varies, but it is present everywhere, even in those rooms where the air seems dry. And steam accumulates in the ceiling area, so mold appears first there and on the side walls at the corners of the ceiling. High indoor humidity contributes to the premature destruction of building materials and increases the likelihood of wood being destroyed by beetles and other woody insects that require moisture to survive.

Which Izospan is suitable for the ceiling

There are types of Izospan that include several characteristics at the same time, and there are those that have only the main technical characteristics necessary for vapor barrier: moisture impermeability, elimination of condensation.

Izospan B is best suited for ceilings; it is used to protect insulation materials located on the inside. If we are talking about vapor barrier of the attic ceiling from the outside, then Izospan A is used, for the ceiling of an unheated basement - Izospan D.

How to attach Izospan

Attaching the film begins with preparing the surface. The ceiling is cleaned of dirt, dust, and protrusions. If there are depressions, they must be treated with putty; in the same way, defects are eliminated: crevices, depressions, cracks. The finished surface is coated with a primer and allowed to dry thoroughly.

Film installation:

1. The roll is unrolled, the film is cut into pieces and strips of the size required to cover the ceiling.
2. The first strip of vapor barrier is attached parallel to the floor, the smooth part is pressed against the sub-ceiling or insulation (attic roof).
3. The second tape goes on top of the first, overlapping it by 15 cm, each subsequent layer of film should go with the same overlap of the previous one.
4. The fabrics are fixed at the junction with a stapler.
5. The joints are sealed with special tape.
6. Then a lathing is made, thanks to which a ventilation gap of 4–5 cm is formed.
7. Finishing material is installed.

We hope that our instructions will help you install the vapor barrier correctly. If you have any questions regarding technology, ask our expert.

Video: Izospan vapor barrier technology

Each modern building cannot exist without a thermal insulation layer. However, this layer itself requires protection. Vapor barrier materials, for example, Izospan A, come to the rescue.

First, let's determine whether vapor barrier is important for walls and roofs? Undoubtedly. It will preserve the insulation of the roof and walls. Waterproofing is used on floors and partitions that are exposed to all kinds of climatic changes.

Exist the following types vapor barrier materials:

• Standard film. It helps protect against condensation that may appear on the inner surface of walls, roofing, and insulation.
• Membrane film coating. These materials remove excess moisture and fumes from the premises. In addition, there is a subtype of it that has the property of variable vapor permeability, which increases in proportion to humidity.
• Foil with aluminum coating . Performs the functions of vapor and heat insulation due to its reflective properties.
• Roofing membrane. Resistant to temperature changes and ultraviolet radiation. It is distinguished by high strength indicators.

Izospan A and “what is it eaten with”

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 authority in the construction business.

TO technical features vapor barriers Izospan A should include:

• Strength of the material;
• Elasticity;
• Environmental safety;
• High protection against mechanical influences.

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

Group A films are used to protect the exterior of premises.

The letter “A” on the material indicates that this is an ordinary film of this group, without any modifications. Technical characteristics of Izospan AM and AS are distinguished by the fact that they are made of three layers, which allows increasing the level of protection of buildings. In addition, this group of materials also contains fire-resistant films.

Izospan A with OZD (with fire retardant additives) – waterproofing film, which not only protects from the effects of air masses, but also from accidental fires (when welding work, in case of 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 any type of premises. Thanks to its wind- and moisture-proof 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.

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

Izospan A - technical characteristics

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 the individual variations of Izospan A: Izospan A (density 110 g/m²), Izospan AM (density 90 g/m²), Izospan AS (density 115 g/m²), Izospan AQ proff (density 120 g /m²).

Vapor barrier Izospan A specifications which are designated by the manufacturer:

• Material tensile strength: 190/140 millimeters;
• Impact Stability ultraviolet radiation: 3-4 months;
• Water resistance: 300 millimeters;
• Vapor permeability: no less than 2000.

Instructions for use Izospan A

The instructions for using this material begin with the question of many builders: “Which side to the insulation should be laid with Izospan A?”

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

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

• metal profile and wooden slats;
• self-tapping screws;
• fixation of individual areas may require construction stapler and tape;
• scissors for cutting 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 Izospan A vapor barrier on an insulated roof, the material is cut into wide strips and overlapped. The smooth surface of the vapor barrier should remain on the outside. Installation of Izospan A should begin from the bottom of the roof. Izospan should 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 may create noise during strong wind gusts.

Izospan A is attached 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 water 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:

• Sloping roof;
• Internal walls;
• Frame walls;
• Attic and basement floors.

Installation diagram depending on purpose:

• Non-insulated and sloping roof: 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 you need to strictly follow all the subtleties of using this material so as not to be disappointed later. Take into account what exactly you are insulating: insulation of walls, roofs, or whether it is carriage 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 sides, but also negative. Let's start, as usual, with the good. The advantages of Izospan waterproofing include:

• This is a highly durable material;
• Service life exceeds 50 years;
• Climate resistance various kinds: evaporation, wind, precipitation;
• Safety and environmental friendliness;
• The use of Izospan A does not cause unnecessary difficulties during installation.

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

How important is vapor barrier for walls and roofs?

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

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

Although the Hexa company is not a monopolist on the market building materials, but completely occupies the niche of vapor barrier films and membranes. Their products are a windproof, vapor-permeable, waterproofing membrane under the Izospan brand. Depending on the structure, density and scope of application, series A, B, C, D, E, F, K, etc. are produced. Basically, these are two-layer nonwoven materials, where one side is smooth, the other is fleecy and/or rough.

Using Izospan B film as an example, we will tell you which side to lay towards the insulation, how to lay it correctly and what they are generally intended for.

Why Izospan

This is not the first article we have devoted to the study of this material, so we will briefly discuss the main characteristics and scope of application.

Izospan B (V) - two-layer non-woven material, used to protect all types of structures, including floors, in all buildings. Prevents the formation of condensation and, as a result, the development of fungus. Retains dust and insulation fibers and serves as wind protection.

Membrane properties

It consists of two layers - the outer one is smooth for easy fastening, the bottom one is perforated to retain moisture. This difference in texture makes it easy to figure out which side to put Izospan to the insulation - with the bottom fleecy layer towards the place where condensation forms in order to constantly remove it.

Provided that a vapor barrier membrane is used, the structure is reliably protected from the formation excess moisture, accumulation of condensate on nodes and metal elements, rotting wooden rafters and walls, etc. Side effect The use of such a film is that it prevents insulation fibers, especially if it is mineral wool and especially glass wool, from entering the room.

VIDEO: Which side to lay steam and waterproofing

We understand the sides and fastening

Let us remind you once again which side to lay Izospan B - perforated towards the insulation, smooth outwards. Even if it is not possible to determine by touch which of them is rough, the marking - the name of the canvas is displayed on the smooth side, that is, when attaching it, you should see the name.

The inner side of the fabric is designed to absorb moisture

Installation of the Izospan material is carried out by one side or the other, depending on what material is used.

The membrane is always attached to load-bearing structural elements or to rough cladding or flooring. Fasten the canvas wooden slats or a construction stapler.

If lining, eurolining, plywood, etc. are used for finishing, the film is fixed with thin wooden slats parallel to each other. Insulation is inserted between the slats, in this case the smooth surface faces it.

When carrying out vapor barrier waterproofing of the roof, individual strips are attached overlapping each other (the overlap width is at least 10 cm) and fixed with double-sided tape, and the attachment point itself is additionally covered with vapor barrier tape. The Hexa company produces a whole line adhesive tapes precisely for such needs.

It is clear that it is necessary to determine which side to put Izospan in each specific situation, taking into account that its fleecy surface should absorb water, that is, it faces the place where the condensation will come from.

Application in certain areas

The use of a vapor barrier material greatly extends the service life of the insulation and, as a consequence, the entire building structure. Its main task is to prevent the penetration of condensate and the formation of fungus.

Membrane or polyethylene film - required element when constructing an insulated roof. It is mounted on the elements of the supporting frame, less often - on the rough finish. It is necessary to ensure that moisture formed due to temperature differences does not get on the insulation. To enhance the characteristics of the joints (overlapping), Izospan SL is glued.

It is laid with the smooth side against the insulation, regardless of its type - polystyrene foam, polystyrene foam, mineral wool, etc.

The structure of the product is such that it is equally successfully used both externally and internal insulation. The main thing is that straight lines do not fall on the film. Sun rays- they significantly reduce the service life and generally have a negative effect on the canvas. At exterior decoration the smooth side also faces the heat insulator.

Floor structures

Polyethylene is laid between the cladding and the rough ceiling with the perforated (reverse) side down and directly above the insulation itself, with the rough surface facing it.

Be sure to make a ventilation gap of 40-50 mm between the vapor barrier and the insulation for air circulation.

To ensure the tightness of the joints, it does not matter whether they use series B or FX; when they are laid end-to-end, they are glued with KL or SL tape.

When laying any flooring On concrete, brick, cement and other bases (with the exception of wood and its derivatives), a layer of vapor and waterproofing must be laid to compensate for temperature differences and absorb condensation. They lay the canvas directly on the screed, they can lay it with insulation if the decorative coating is thin, or they can immediately lay parquet or laminate on the base.

Installation instructions

In houses and premises where work is being done to insulate walls and roofs, the membrane sheet is attached to the supporting frame between the insulation and the rough finish, with the smooth side facing the insulation. For fixing, it is permissible to use galvanized nails with large heads so as not to tear them, or use a stapler - this is much more convenient and faster.

When working with inclined surfaces, cut the required size sheets in advance and fasten them horizontally from bottom to top with an overlap of 10-15 cm.

During further finishing with lining and other wood panels the film is fixed with wooden slats with an edge of 40 mm, pre-impregnated with an antiseptic.

When plasterboard is used for rough finishing of walls, the membrane is secured with staples or galvanized nails, with its smooth side facing the insulation and fitting as tightly as possible to it.

At excess humidity, roof insulation or external wall insulation, the joints are additionally fixed with double-sided tape Izospan KL or single-sided tape SL.

It is prohibited to use ordinary stationery tape - it will not last even a day on the surface of the membrane.

For insulating floors, foundations and ground floor Izospan B is laid between the subfloor and decorative coating. The panels are also laid overlapping, but between outside and the insulation should have a ventilation gap for air circulation - 40-50 mm is enough.

The same applies when laying the floor on cement or concrete screed. In this case, be sure to use adhesive tape or connecting tape for the longitudinal seam of the panels to prevent even the slightest wetting of the parquet or laminate.

Scope of application of individual series

• A - membrane for the under-roof surface to protect against moisture and wind;
• B - vapor barrier
• AS - “breathing” diffusion membrane;
• AM - “breathing” diffusion membrane;
• AQ - professional line protective equipment;
• FS - reflective with foil layer;
• D - vapor and waterproofing membrane;
• KL, SL, FL, FL - double-sided and single-sided connecting tapes

In general, we figured out which side to put Izospan to the insulation, supporting frame, subfloors and some types of finishing. If you have any questions, you can ask them in the comments to the article. The company's specialists will answer them as soon as possible.

VIDEO: Condensation on the roof + incorrect vapor barrier

Wind-moisture-proof vapor-permeable membrane

"Izospan A" is used for protection against wind and condensation internal elements roofs and walls, insulation in buildings of all types. This material mounted on the outside of the insulation under the roofing or external 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-condensation structure designed to retain condensate droplets and their subsequent evaporation into air flow. This material protects the insulation and structure from the penetration of condensation from environment, ensures the weathering of water vapor from insulation.

When using Izospan A, the heat-protective characteristics of insulation 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:

• Maintaining 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 coating(from profiled sheets, metal tiles, natural tiles, soft bitumen tiles etc.), having an angle of inclination of more than 35° “Izospan A” is used as an under-roof wind and moisture protective membrane. It is installed under the sheathing on top of the rafters above the insulation for additional protection from the wind, as well as protection of load-bearing elements and insulation from under-roof condensation.

• Roofing
• Izospan A
• Counterrail
• 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 building cladding on the outside of the insulation. The material protects the external walls of low-rise buildings made of panel, combined, frame structure and timber from exposure to wind and atmospheric moisture in all cases of use outer skin(siding, lining, etc.) when insulating walls from the outside.

Timber wall

• External cladding
• Counterrail
• Izospan A
• Insulation

Frame wall

• External cladding
• Counterrail
• Izospan A
• Insulation
• Vapor barrier Izospan V
• Interior decoration

“Izospan A” is also used to protect insulation materials in the structures of ventilated facades of high-rise buildings with external insulation. It not only promotes the evaporation of moisture from the insulation, but also protects the insulation from the effects of cold air, snow, atmospheric moisture, and winds that penetrate under the outer cladding through the ventilated gap.

• Decorative finishing
• Izospan A
• Insulation
• Elements of the installation system
• Bearing wall

Installation instructions for Izospan A materials

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

At vertical joints, the overlap of panels should be at least 20cm, and at horizontal joints - at least 15cm. In the area of ​​the roof ridge, a ventilation gap of 5 to 8 cm should be left between the panels. The material is stretched and strengthened using wooden aseptic counter-battens (3 by 5 cm) on screws or nails directly on the rafters. Solid boardwalk or a batten (determined by the type of roofing) is mounted on counter battens. Between the insulation and moisture-proof membrane a ventilation gap of 3 to 5 cm should be provided to ventilate condensate; between the roofing covering and the membrane the gap should be the thickness of the counter-batten (from 3 to 5 cm). The material must be secured in a tensioned state; the sag between the rafters should be no more than 2 cm. To prevent a decrease in the waterproofing properties of Izospan A, it is necessary to prevent contact between the material and the insulation. The lower edge should facilitate the natural drainage of moisture into the gutter from the surface of the membrane. The under-roof space must be ventilated to freely ventilate condensate and steam. In the lower part of the roof in the ridge area there should be provisions for this purpose. ventilation holes for free air circulation.

You should be careful that Izospan A is not used as the main roof covering to provide temporary protection building structures during installation you should use “Izospan D” or “Izospan C”.

When constructing walls with external insulation in low-rise buildings (Fig. 3-4), it is necessary to install Izospan A on top of the insulation according to wooden frame, starting from the bottom of the wall. The panels should be placed with the smooth side facing out horizontally, overlapping at the vertical and horizontal joints by at least 10 cm, secured with galvanized nails or a construction stapler to the frame. On top of the covering it is necessary to fasten wooden counter-battens that carry the outer cladding (siding, lining, etc.). Between external cladding and the membrane, it is necessary 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 high-rise buildings, the material must be placed with the smooth side outward on top of the insulation on the inside of the ventilated gap. Installation must be carried out according to the type external cladding and the mounting system used. In any case, the material must fit tightly to the insulation, be firmly attached to the elements of the mounting systems, and have no loose areas or sagging, since this leads to acoustic “pops” when exposed to sudden wind loads inside the ventilated gap. The layout of the material panels should facilitate the natural drainage of external moisture that penetrates under the cladding

Izospan materials are convenient and durable films for construction that have various purposes and application features. They are distinguished by high performance characteristics and, depending on the modification, can be used as a moisture-, steam- and wind-proof layer at almost any stage of construction or finishing work.

Wind- and moisture-proof protective membrane films

Membrane films used to protect structural and thermal insulation elements of buildings from weathering, sedimentary moisture and condensation are made of polypropylene, known for its durability, environmental safety and resistance to various aggressive substances and microorganisms. Izospan windproof membranes have several modifications:

• Izospan A is a single-layer membrane with windproof and moisture-proof properties, used for thermal insulation of walls and roofs for wind and moisture protection of the insulation. Outer side the film is smooth, with water-repellent properties, the inner one is porous, which ensures the removal of moisture from the insulation layer.
• The two-layer version - Izospan AM, is distinguished by a high-strength backup layer that protects the membrane film from damage during installation work and operation. Has high water-repellent ability.
• Modification of Izospan AF – wind- and moisture-proof film with fire protection, made using membrane technology. Fire protection allows the use of Izospan AF in flammable wooden buildings, as well as for wind protection of easily flammable insulation materials.
• Izospan AS – three-layer membrane film with increased water-repellent properties. Laying directly on the insulation layer is allowed, without creating a ventilation gap.

Hydro- and vapor barrier films

Modifications of Izospan used to protect all building elements from moisture vapor both inside and outside the premises, as well as in interfloor and under-roof ceilings. Made from polypropylene, have a laminated exterior and porous inner surface. The loose structure allows condensate to accumulate, but does not prevent its further evaporation, thereby removing moisture vapor from moisture-intensive structures and preventing the appearance of condensate drops on them.

• Izospan B refers to vapor barrier films, is used to protect walls, partitions, as well as layers of fiber insulation from the penetration of water vapor from inside the building. In addition to vapor barrier properties, they provide protection interior walls from mold and mildew, dust and insulation particles. Can be used in buildings made of any materials.
• Izospan C has higher hydro- and vapor barrier properties, due to which it is used as a moisture-proof film in unheated attics, as an under-roof water vapor barrier and as a moisture-proof substrate for laying laminate and parquet. High mechanical strength allows it to be used as roof waterproofing under metal tiles. Izospan S is able to withstand roof leaks in places of fastening and abutment to structural elements and provides excellent protection rafter system from getting wet and condensation.
• Izospan D - universal vapor barrier for any structural elements, with very low vapor permeability and high density. Can withstand significant mechanical forces, including snow loads.

Izospan DM is a modification of the universal vapor and moisture protective coating with increased strength, anti-condensation layer and UV protection. The scope of application is much wider than that of Izospan D; it can be used as a temporary coating for roofs and walls during construction and finishing.

Metallized films

Izospans with a metallized inner layer are presented in several modifications. Their scope of application is determined by their ability to reflect infrared radiation, due to which, in addition to steam and moisture protection properties, they provide additional thermal insulation of rooms.

• Water vapor barrier film with a metallized reflective layer Izospan FB is intended for internal protection of steam rooms of baths, saunas, and other rooms with elevated temperature, as well as for protection from moisture and condensation of heated under-roof spaces, attics, wall partitions and ceilings. Metallized lavsan fabric is used as a reflective layer.
• Izospan FD is a polypropylene film with metallization, the scope of application is the protection of roofing and wall structures from wind, moisture from outside the room, and from condensation of internal vapors. Can be used as an infrared screen. It has increased tensile strength and can withstand significant mechanical loads.
• Modification Izospan FS is used as vapor and waterproofing various designs, and also as an additional heat-reflecting layer when interior decoration. It has a lower density and, accordingly, a lower price.