Characteristics and application of isospan a. Hydro - vapor barrier "Izospan B"

The process of choosing wind, hydro and steam protection should be carried out with special care, since among a large number manufacturers, you need to choose a material that will be the most reliable. The membrane of the Izospan company has established itself as a high-quality product, the strength of which has been tested for years. We will talk about the features and subtleties of installing the Izospan membrane further.

Membrane "Izospan" - features and general information

To create comfortable living conditions in the house and in order to improve the duration of its operation, care should be taken to install high-quality insulation. It will help protect the foundation, walls, floors and ceilings from the harmful effects of the environment.

Without the use of insulating materials, moisture, wind or condensation can destroy both the exterior and interior of the building. In this case, it is recommended to use high-quality insulation, which Izospan materials can provide.

These products have been on the market for more than ten years, and are in great demand in both consumer and professional construction. For the manufacture of waterproofing materials "Izospan" a special individual technical base is used. The quality of manufactured products is carefully monitored by specialists from the development department.

Izospan materials providing vapor and moisture protection are distinguished by the presence of Certificates of Conformity, Fire Safety Certificates.

A wide variety of types and forms of Izospan materials allows you to choose exactly the type of insulation that the buyer needs.

For a long time the Izospan company has been in the modern construction market, products have appeared that are outwardly similar to the Izospan products, but have dubious quality and low technical characteristics. To avoid counterfeiting when buying an Izospan membrane, you should follow these rules:

  • all materials have a specialized branded sleeve and packaging, a special polyethylene sleeve is used for packaging the membrane, with a corporate coloring and a special print;
  • each of the rolls is equipped with an instruction manual and an information leaflet that introduces other products of the company;
  • on the inner surface of the sleeve, on which the material is located, there is a print with the “GEXA” logo;
  • one of the ends of the roll has a logo indicating information about the lot, the number of the packer and the date of manufacture of the goods;
  • all side sections of the roll are sealed with adhesive tape, which has individual designations with the name of the material.

Advantages of using Izospan materials

Due to the presence of heat-reflecting characteristics, Izospan materials provide reliable protection any types of buildings from wind and moisture.

Thanks to the use of Izospan vapor barrier, the risk of high humidity in attics is eliminated, and with the help of heat-reflecting properties, it is possible to provide reliable protection against the formation of condensate masses.

With the help of mounting connecting tapes, it is possible to provide additional tightness of the fastening. In addition, providing additional wind protection for the building is added to the functions of the material.

The scope of use of the Izospan membrane is quite wide and extends to the internal and external insulation of walls, roofs, floors, ceilings, thereby ensuring the risk of condensation and damage to the finish.

It is possible to use Izospan insulation as a floor underlay. In this case, the materials reflect even infrared rays and direct the heat flow directly into the room.

The use of these materials allows you to provide reliable protection against:

  • exposure to high humidity;
  • formation of condensate masses;
  • wind hits.

In addition, the functional features of the membranes make it possible to reduce the temperature load associated with seasonal temperature changes. Insulation is able to protect the insulation in the system:

  • facade purpose;
  • roof structures;
  • walls and floors;
  • floor coverings.

In addition, the use of Izospan materials allows you to create favorable and comfortable conditions for living indoors.

In relation to the main functional features materials presented on the modern construction market, Izospan products are characterized by:

  • providing wind resistance and protection of roofing systems;
  • vapor barrier of walls and ceilings;
  • connection of joints of materials with the help of connecting tapes.

"Izospan" characteristics and variety of material

We offer to study the entire range of products manufactured by Izospan:

1. Membranes or films for waterproofing, vapor and wind protection purposes.

Hydro and wind protection is made to protect the elements of the insulation system and structural elements of the building from the formation of condensate masses, winds and moisture that enters from the environment.

At the same time, the outer side of this protection has a vapor-permeable shell, with the help of which all water vapor and accumulations are weathered.

The use of these materials is extended to roofing and wall structures, as well as to ventilated facades. Due to the combination of high water resistance and vapor permeability, these membranes are in high demand among consumers.

2. Films for vapor barrier and waterproofing purposes.

These materials protect the insulation on walls, roofs and floors from steam and condensation, which significantly reduces the quality of insulation.

With the help of vapor and waterproofing films, the thermal insulation of the insulation is maintained and the life of the entire structure is extended. In addition, condensate does not collect inside the walls, mold and fungus do not form, and corrosion does not occur on metal elements.

3. Heat-vapor-waterproofing of a reflective type, which has the effect of energy saving.

These materials have a metallized surface that reflects infrared rays and provides reliable protection of the insulation from steam with inside and from moisture from the outside. The use of these materials allows you to save energy for heating the room in the winter.

4. The use of connecting tapes allows for reliable joining of the material for a long time.

Varieties of membranes "Izospan" and their features

1. "Izospan Aqua Prof" - appears in the form of a professional three-layer protective membrane, which protects the insulation and roofing system from wind, high humidity and condensate masses. The material is laid directly on the insulation materials, there is no ventilation gap, in this case. Thus, you do not need to spend money on arranging a special crate.

This material has high properties of vapor permeability, resistance to light and moisture. In addition, it is resistant to mechanical damage, and any weather is suitable for its installation.

Scope of material use:

  • surfaces of insulated and non-insulated sloping roofs;
  • arrangement of frame walls;
  • external wall insulation;
  • waterproofing of ventilated facades;
  • arrangement of attic floors.

The material is 100 percent polypropylene, it is able to work in such temperature regime-60 to +75.

2. "Izospan AM" - a vapor-permeable membrane, which consists of three layers. It is used to ensure protection of thermal insulation and elements of the roofing and wall system from moisture and condensation. The material has high moisture-repellent properties, but at the same time it is vapor-permeable, therefore, it increases the life of the building.

It is forbidden to use the material as any type of roofing finish.

3. "Izospan AS" - has the form of a three-layer membrane, which is used to protect different parts buildings from moisture, wind and condensate masses. Among the advantages of the material should be highlighted:

  • ease of installation and installation work;
  • high resistance to moisture;
  • high level of strength before stretching and tearing;
  • high level of vapor permeability;
  • resistance to ultraviolet radiation;
  • environmental friendliness and safety of use;
  • ease of transportation, convenient shape and light weight.

4. "Izospan A" - a vapor-permeable membrane that protects the insulation and the surface of the walls from atmospheric action and wind. In addition, it helps to remove steam from the inside of the room. The material is laid from the outside of the insulation to the surface before carrying out external finishing works. Due to the use of the membrane, the quality of insulation improves and the service life of the entire building is extended.

The scope of use covers:

  • the surface of the frame walls;
  • external surfaces of walls;
  • ventilated facades.

5. “Izospan fire retardant action (OZD) A” - a new type of wind and moisture protective membrane with fire retardant additives. The use of this type of membrane provides not only protection of the building from wind, condensation and moisture, but also prevents its accidental ignition, which occurs in such cases:

  • in the process of welding;
  • in the process of waterproofing the basement;
  • in other situations.

6. "Izospan AF" - a non-combustible type membrane used in the process of waterproofing facade sections of a ventilated type, insulation and other structural elements of a building. The material is based on the use of fiberglass, which is completely incombustible.

7. “Izospan AF +” - a non-combustible membrane with enhanced characteristics, which is used for the purpose of wind and waterproofing of building elements. In addition, the use of this material provides additional protection of the building from fire.

How to lay "Izospan": features of the installation of membranes

In answering the question which side to put "Izospan" should be extremely careful, as improper laying of the material will lead to a violation of the integrity of the waterproofing system.

The membrane, on the one hand, has a layer that allows air to pass through, thereby ensuring the disposal of condensate, and its other side is not able to pass either moisture or wind.

We suggest that you familiarize yourself with the recommendations for the installation of Izospan AS and AM membranes. They are used to protect roofing from wind and moisture. The fastening of the material is carried out directly on the heat-insulating materials, while the ventilation gap should not be observed. The smooth blue side of the material should be on the outside of the roof.

These types of membranes provide reliable protection of the building from atmospheric precipitation, wind or defects in roofing. In addition, with the help of the membrane, the removal of moisture through the surface of the insulation is improved.

These membranes are not used as primary or secondary roofing materials.

If a membrane is installed on an insulated roof, then the insulation is cut and rolled directly onto it. Installation is best to start from the bottom of the roof. The minimum overlap is 150 mm. To fix the stretched material on the surface of the rafters, a construction stapler is used.

Next, wooden antiseptic counter-rails are attached to the material. They are fixed with nails or screws. The vertical overlap or joint of two parts of the membrane is pressed against the counter rail. In addition, a crate is mounted on them for further roofing. There must be a ventilation gap between the outer part of the membrane and the roof covering, which will help to remove condensate from the under-roof space. In addition, you need to worry about arranging the ventilation gap in the ridge part.

The membrane is fixed in a tensioned position, with the help of the lower edge, a lower drain of condensate is provided, which enters the drainage system.

Installation of membranes "Izospan A, AF" is carried out with a ventilation gap of 4-5 cm, over insulation, rafters or battens.

If materials are laid on an insulated roof, then the rolling and cutting of the material is carried out on the rafters. Installation is carried out by laying horizontal sheets with an overlap, while their smooth side should be on the outside. Minimum overlap 150 mm.

To fix the canvases, counter rails are also used, which are fixed with nails or self-tapping screws. The minimum sagging of the membrane is 2 cm. The material must not come into contact with insulation or solid wooden plots, as this negatively affects its functional activity.

Application of "Izospan" video:

is a line of polypropylene non-woven materials intended for vapor and waterproofing of structures.

Izospan protects structural elements and insulation from:

  • rain, snow and wind;
  • moisture generated inside the building;

Isospan is used in constructions:

  • roofing;
  • insulated walls;
  • attic floor;
  • floors on a concrete base;

The manufacturing technology of non-woven fabric is fully automated. But at the same time, quality control is necessarily carried out at each stage.

Izospan has a hygienic, fire certificate. Also, the products have been tested for compliance with building codes and state standards. As a result, a GOSTSTROY certificate was issued for it. Izospan has no analogues among similar domestic products.

Specifications

Characteristics of isospan B,C,D,DM:



When choosing vapor barrier materials, you need to pay attention to the following parameters:

  1. Vapor permeability.
  2. Strength.
  3. Density.
  4. Water resistance.
  5. UV stability.

Isospan A has the highest vapor permeability (3000gr/m2/day), but it has the lowest water resistance index (330 mm water column), which makes it possible to use it only on roofs with a slope greater than 35°. But nothing prevents you from using this material in .

Izospan AS and AD have a vapor permeability coefficient of 1000 and 1500 g / m 2 / day, respectively, but they are favorably distinguished by the water resistance index - 1000 mm of water column. As a result, they have become the main materials used in roof insulation.

If it is expected that the roof will remain uncoated for some period of time, AQ proff isospan must be used. It alone has UV stability for 12 months.

Isospan D has the best tensile strength of 1068/890 N/5 cm, but it has the lowest vapor permeability of 3.7 g/m2/day. This allows the material to be used as a temporary roof for 3-4 months.

Isospan B has a vapor permeability of 22 g / m 2 / day, and the tear rate is only 130/170 N / 5 cm. In this regard, it is necessary to involve qualified specialists in its laying and not leave the material in the open.

Izospan C is an intermediate option.

Peculiarities

  1. Polypropylene film with smooth top and fluffy bottom. The villi are necessary to retain condensed moisture and prevent it from rolling onto finishing materials. Installed in front of the heater in such structures:
    • insulated roof;
    • walls;
    • overlaps;
  2. Laminated fabric with a smooth and fleecy side. Due to the increased density, the scope of this material is expanding. It is used:
    • On unheated roofs, as a moisture barrier.
    • In ceilings (including over basements and attics), as a vapor barrier.
    • in floor structures.
    • AT concrete screed like a hydro barrier.
  3. Polypropylene fabric laminated with film. Izospan D is widely used as:
    • Additional moisture insulation on unheated roofs.
    • Vapor barriers for any structures requiring protection from water vapor.
    • Waterproofing layer in the screed.
    • Temporary roof.
  4. Diaphragms marked A, AS, AM, AQ proff protect the insulation from getting wet, weathering and remove condensate from the roofing or wall pie to the drainage system. Benefits of using:
    • Moisture residues that have fallen into the insulation layer from the room are easily removed.
    • Minimizes the chance of heat penetration insulating material atmospheric precipitation.
    • The weathering of mineral wool becomes impossible.
  5. Membrane a. The polypropylene membrane has a smooth water-repellent side and a rough side that retains condensate. This type of membrane has a low water resistance coefficient, so its main purpose is to protect the insulation on the facade.
  6. Izospan AS, AM, AQ proff. AS, AM are a membrane made of a vapor-permeable material and a dense air-tight substrate. Used to protect:
    • Frame type wall.
    • ventilated facades.
    • Insulated roof.
  7. Heat-reflecting vapor barriers FB, FD, FS, FX retain the smallest particles of moisture and radiant energy in the room. Advantages of using thermal and waterproofing reflective films:
    • Reduces heat loss through building envelopes.
    • Reduced heating costs.
    • Eliminates the possibility of mold formation in damp rooms;
  8. Vapor barrier FB. Izospan FB is made from kraft paper, which is covered with a layer of metallized lavsan. Due to the fact that the material is environmentally friendly and can withstand temperatures up to + 120 ° C, it is used to insulate walls, roofs and saunas.
  9. Vapor barrier FD, FS. Izospan FD, FS is a polypropylene film reinforced with a metallized layer. Isospan FD uses a vapor barrier film of grade D as the base layer, and grade B is used in FS. Manufacturers recommend using the described vapor barrier for interior decoration:
    • steam rooms;
    • attic;
    • as a heat-reflecting screen;
  10. This material is a foamed polyethylene, duplicated with a metallized film. Polyethylene with a layer of bubbles is an excellent heat and sound insulator, and a metallized layer prevents heat leakage, retains steam and water. Izospan FX is the most cost-effective, safe and durable vapor, noise and heat insulator. Its drawback is the maximum operating temperature - + 90 ° C, which makes it impossible to use it in steam rooms. It is actively used as:
    • Substrates for underfloor heating.
    • reflective screen for .
    • Insulation on mansard roofs in tandem with classic materials.

The use of reflective films to insulate walls and ceilings is possible only in rooms with forced ventilation, since these materials have a zero vapor permeability index.

Pros, cons and varieties


 Heat reflective vapor barrier film

Advantages:

  1. Environmental Safety.
  2. A wide range of.
  3. Democratic price.
  4. Reliability and durability.
  5. Fortitude to the formation of mold.

Flaws:

  1. Low durability to the fire.
  2. Fulfills its functions only when properly installed.

By purpose, the material is divided into three types:

  1. Vapor and moisture insulating films.
  2. Moisture and windproof vapor permeable membranes.
  3. Heat reflective vapor barrier films.

The first type includes vapor barrier films of grade C, B, D, which protect the insulation layer from moisture evaporating out through the building envelope.

Benefits of using a vapor barrier film:

  1. Extended service life insulation.
  2. Reduced chance of condensation and contamination of structures with fungus and mold.
  3. Eliminates the possibility of entry into the premises volatile particles of insulation.

Mounting


 Isospan installation scheme on an insulated roof

For laying the material you will need:

  • roulette;
  • a hammer;
  • construction stapler;
  • nails;
  • wooden slats;
  • scotch;

Laying isospan on the roof:

  1. Roof insulation begins with fixing the vapor barrier film(B, C, D) to the load-bearing frame or to the rough skin.
  2. Fix the material with staples or galvanized nails. For additional sealing, the seams are fastened with a special adhesive tape isospan SL or KL.
  3. The panels are rolled out horizontally in the direction from bottom to top. An overlap of 15-18 mm is made between adjacent canvases.
  4. During installation, you need to monitor the tight fit of the film to the insulation.
  5. Over thermal insulation A, AS, AM, AQ proff.
  6. Isospan A is fastened with antiseptic countertrays to the rafters nails or self-tapping screws, so that a gap of 5 mm is formed. Izospan AS, AM, AQ proff, on the contrary, should fit snugly against the insulation. Therefore, it is attached to the rafters with staples or galvanized nails.
  7. Installation starts from the bottom of the slopes. Along the overhang of the slope, the membrane is led into the gutter. The canvas is rolled out horizontally, making sure that there are no distortions. It is important to secure the material in tension. Permissible sagging - no more than 2 cm. Horizontally, the canvases should overlap each other by 15 cm, and vertically - by 20 cm.
  8. To allow condensation to evaporate, in the area of ​​\u200b\u200bthe ridge and in the lower part of the roof, ventilation holes are provided.
  9. Over the vapor barrier membrane mount the crate.

Izospan will perform its function only if it is properly laid. The fleecy side of the material should face the room, and the smooth side should face the insulation.

It is worth paying attention to the fact that isospan A is the most available material, but its installation due to the need to create a ventilation gap is more expensive than the cost of more durable and durable analogues.


 Wall insulation:

  1. For ventilated facades suitable isospan A and AM. In cases where there is a possibility of fire, use material with OZD.
  2. The membrane is fixed over the insulation with the smooth side out. The panels are rolled out so that there is an overlap of 10 cm.
  3. Isospan is fixed on the frame of the building with brackets. On top of the vapor-permeable membrane, counterbars are vertically fixed, on which the facing material is attached. In order to avoid the effect of acoustic pops during operation, there should be no loose and sagging sections along the entire length of the web.
  4. For moisture removal, the design necessarily provides for a ventilation gap in the lower part of the skin. Izospan is laid so that the moisture accumulated under the skin drains into the drainage system.

The device of moisture and vapor barrier is a very important stage of construction. One of the best materials used for this purpose is isospan. It belongs to the category of relatively new products used in the protection of structures. The manufacturer presents a wide range of insulating films that differ in purpose.

You will learn everything about the range of membrane films marked as isospan A, B, C, D from our article. We have described popular insulating materials in detail, given their technical characteristics. Independent home masters will find installation manuals and helpful tips.

For the most part, isospan is produced in the form of a membrane or film. Both modifications have a vapor barrier function. There are types that are 100% waterproof and allow moisture to pass through unilaterally. If we consider the types of this material separately, then each is designed for separate tasks.

The term isospan hides four broad groups - A, B, C, D. They are distinguished by individual design features.

Isospan is used in the construction, installation of cold roofs, construction of baths, as an insulator for building envelopes. The material is especially effective as a protection of insulation systems and wooden elements from putrefactive processes, and metal elements from corrosion.

There is an isospan used inside buildings, and its other varieties are intended for outdoor use. Available and isospan universal application. In any case, its use makes it possible to significantly prolong the functioning of the insulation, which, under the influence of moisture, quickly loses its properties.

Three main groups of isospan can be distinguished: moisture and windproof, vapor and moisture protective, vapor-tight. The materials included in the second group are used for finishing interior work.

Vapor-proof isospan is used when performing both internal and external works. According to the functionality of the material, it is divided into classes.

Group A insulation material

The material marked with the letter "A" belongs to the first group. It is characterized high density, therefore, it is indispensable for the insulation of attics, walls, roofs. It does not develop fungi, mold.

This diffusion membrane retains water, but steam passes through it unhindered. Made from polypropylene. It strengthens and protects the thermal insulation from the influence of outdoor atmospheric moisture or cold air from the side of the room that is not heated.


Izospan A is an excellent wind barrier for ventilated facades. It eliminates the effects caused by the onslaught of side winds, which favor the escape of heated air from the heat-insulating layer.

In order for isospan A to fully reveal its capabilities, it is necessary to follow the installation technology exactly. Since the air jets pass through it only unilaterally, in no case should the sides be confused. Otherwise, the insulation layer will get wet due to the accumulation of moisture in it.

Isospan A is produced in rolls 1.6 m wide. The area of ​​the material in the reel is 35.7 m². The optimal temperature limits for operation are -60 - 80⁰. For three or even four months, the membrane can be exposed to ultraviolet radiation without loss of performance. In the future, these aggressive rays will gradually reduce the UV stability of the material.

Izospan marked with the letter A may contain flame retardant additives. Then one more is added to all its characteristics - fire protection. This brand belongs to the G1 combustibility group, and in terms of flame propagation speed - to the RP1 group.

The material withstands sufficiently high breaking forces - from 125 longitudinal and from 95 N/5 cm transverse. This is facilitated by special additives that enhance the structure of the material.

Vapor permeability of the material - at least 3500 g / m² day. Water resistance parameter - 330 - mm. water. Art. Based on these characteristics, it is advisable to use isospan A for the installation of ventilated facades, frame enclosing structures, roofs with double lathing and slopes at an angle of 35⁰.


The AS 3-layer membrane well insulates both wall and roof structures from street moisture and steam. The presence of such a barrier guarantees the safety of the insulation

In contrast to the group A membrane, the AM film has a two-layer structure. It has also found application to protect insulation, roofing elements from condensate, weathering.

These types of insulation have a number of differences:

  1. AS- the most durable, in addition, it stands out for a rather significant service life, but the steam pass rate is only 1000 g / m² per day.
  2. BUT- the best view in terms of vapor permeability.
  3. AD- strong membrane with a vapor permeability of 1500 g/m² per day.

There are differences in terms of installation. In the case of grade A, an air gap is required, otherwise the steam will be removed inefficiently. AS, AD membranes are mounted directly on the insulation.

The second group marked B

This vapor barrier has a slightly lower price.

The technical parameters of isospan B are as follows:

  • composition - polypropylene;
  • application temperature - -60 - 80⁰;
  • water resistance - 1000 mm water. With t. minimum;
  • UV resistance - 3 - 4 months;
  • minimum vapor permeability - 7 gr. per m² per day;
  • The structure is two-layer.

It is used as a roofing film in frame enclosing structures, in interior partitions. On the one hand, it is smooth, the opposite side is rough, just on it moisture lingers and it evaporates.

With its help, the structure is insured against penetration inside, walls, systems in a private house.


Isospan grade B is laid so that the rough side is on top. It is a high-quality vapor and waterproofing for rooms with traditionally high humidity - bathrooms, toilets, showers, basements

The price of this brand is the most democratic. Unlike brand A, this material is not fixed on top of the insulation, but on its lower side. Do this from the bottom up, then overlap. For better capture of water vapor, a 5 cm gap is required above the rough layer.

Features of the material group C

With regard to resistance to vapor permeability, water resistance, UV stability, this type of insulation does not differ from the previous material. Isospan brand C has the same temperature range: (-60) - (80⁰). The difference is in the breaking load, here it is greater - the longitudinal minimum is 197, the transverse one is 119 N / 5 cm.

The two-layer film is characterized by special durability. Polymeric membranes of group C perform hydro- and vapor barrier for protection, attics, roofs with a maximum slope of 35⁰.

It is used as a waterproofing underlay for metal tiles, as it perfectly protects the rafter system from rain and melt water. In addition, it is a good waterproofing for bases. different types. The material is also used in the case of concrete floors in places of high humidity.

Product description brand D

A distinctive feature of isospan D is its good resistance to UV rays. The tensile strength is also high - the longitudinal breaking load is not less than 1068 N / 5 cm, 890 - transverse.

Due to its high strength, grade D polypropylene fabric easily withstands considerable mechanical forces during installation and operation, including the weight of snow. For this reason, it is quite suitable as a non-permanent roof, functioning normally for about 4 months.

The material also showed itself well in the role of under-roofing waterproofing in cold roofs. It saves wooden elements from the harmful effects of moisture penetrating from the outside, as well as wind, snow, which can be there through leaks in the roof. This is an effective waterproofing layer in basement floors.

Isospan laying instructions

Steam, moisture and wind protection of the building is a complex event. The use of glassine or polyethylene film is ineffective. Izospan is designed specifically for this purpose and its high quality has been proven by practice.

For installation, in addition to the isospan itself, a supply of tools and fasteners is required:

  • special scissors;
  • self-tapping screws;
  • construction stapler;
  • connecting tape;
  • metal profile or wooden slats.

It should be remembered that the membrane is attached to the walls both from the inside of the room and from the outside, and on the roof - only from the inside. Features of a particular type of isospan are reflected in the instructions for use of the material.

Group A diaphragm assembly

The best application of this thermal insulation, waterproofing, windproof membrane is protection frame wall low-rise buildings from moisture and wind. Mount it on the outside of the insulation layer under the exterior of the building.


The outer side of isospan A does not allow moisture and wind to affect the condition of the insulation. Internal - prevents the formation of condensate, because. has the ability to release steam

Isospan A is laid in accordance with its technical characteristics, carried out on top of the insulation on a special frame.

The technology is simple and does not require special skills:

  1. The roll is unfolded and cut into panels of the required size.
  2. Alternately, segments of the membrane are placed on the frame horizontally overlapping with the even side outward, starting from the bottom, and moving upwards.
  3. Secure the protection on the frame with an overlap using a construction stapler or other method. The minimum overlap both horizontally and vertically is 100 mm.
  4. The material is additionally strengthened. To do this, stretched panels are pinned to the rafters with a construction stapler.
  5. To seal the overlap, the joints of the panels are fastened with 2-sided isospan KL tape.
  6. A self-adhesive tape is laid in the attachment area.
  7. On top of the isospan layer, wooden counter-rails are fixed vertically with respect to the frame. They are pre-treated with an antiseptic. The size of the rails is 40 x 50 mm. They play a role load-bearing structure for exterior cladding - in the form of lining, siding, etc.

A prerequisite is a ventilation gap equal to the thickness of the counter rail between the isospan layer and the outer skin. The bottom edge of the membrane is located in such a way as to divert the flowing moisture into the drain of the basement of the building.

Laying Am and As films in the insulated pitched roof


The material protects the supporting structure and insulation from condensate that collects under the roof, as well as from snow, wind, moisture that enter through loose laying of the coating.

The membrane is laid without a ventilation gap, so there is no need to arrange an additional crate between the insulation layer and the isospan. Fix it in a stretched form.

The sequence of operations is as follows:

  1. The roll is rolled out and cut directly over the insulation.
  2. The panels are laid out horizontally, turning the white side to the insulation. The beginning of installation is the lower part of the roof. The segments overlap horizontally and vertically by at least 15 cm.
  3. Strengthen the membrane along the rafters with a stapler.
  4. The joints are fastened with a solid 2-sided adhesive tape isospan KL.
  5. Traces of fastening with nails or self-tapping screws are closed - glued with a self-adhesive strip along rafter legs and other elements. This is especially true for roofs with a slight slope - up to 22⁰.
  6. Vertically fasten wooden antiseptic slats 4 x 5 cm over the tape along the rafters.
  7. Mount the crate on the counter rails. Based on the type of roof, it can be solid flooring.

To eliminate under-roof condensate between the front side of the film and the roof covering, a condensation gap is arranged using rails about 50 mm thick.


For free movement of air in the space under the roof, the bottom of the roof and the ridge area are supplemented with ventilation holes. Moisture from the surface of the membrane flows into the drain along the lower edge of the membrane

When installing isospan on the crate, a slight sag is allowed. A membrane without insulation is practically useless.

Application of insulating material B

This type of membrane perfectly performs the function of a vapor barrier that protects the insulation layer from water vapor rushing up from the side of the room, and also protects the space of the rooms from the ingress of insulation particles into them.

Mount it from the side of the heater, directed into the room. Carry out installation using a construction stapler on rafters or rough sheathing. Sometimes galvanized nails are used for this purpose. Correctly, when the flat side is closely adjacent to the insulation.

Work starts from the bottom. The vertical and horizontal overlap is the same as for the installation of other types of isospan - from 150 to 200 mm.

As in the case of Izospan Am, the joints are glued with the Izospan KL, SL coupling tape. The contact points of the material with structures made of any material are sealed by using a one-sided adhesive strip of isospan ML proff.


If the room is trimmed with clapboard, the vapor barrier is fixed with wooden slats impregnated with a septic tank 4 x 5 cm. For cladding with plasterboard sheets - galvanized profiles

To the wooden base interior decoration fastened with a ventilation gap of about 40 mm. In the case of using isospan as a vapor barrier for a frame wall, it is fixed from the inside of the insulation to the loaded frame parts or to the rough sheathing.

A stapler is used as a tool, although galvanized nails can also be used. It is laid on a heater with a flat side to it. When finishing the walls with plasterboard, galvanized profiles are used, with clapboard - wooden counter-battens.

Izospan as a vapor barrier of the attic floor is placed in the gap finishing material ceiling - draft ceiling. To the latter turn a smooth surface. In this case, the ventilation gap is also mandatory.

Vapor-permeable membrane grade B is also a good hydro-vapor barrier for interfloor ceilings. Mount between ceiling trim and draft system. The rough side is turned down. Fasten on the beams with an overlap.

Between the layer of insulation and the final layer of vapor barrier, between the finished floor and the layer of vapor barrier, between the material of the finished ceiling and the lower layer of isospan B, a ventilation gap is arranged.

The bottom of the basement must be protected with a layer of vapor barrier. This must be done so that moisture does not penetrate from the ground to the insulation and other structural elements. The recommended type of isospan for this purpose is D.

The best option for using brand D

Isospan type D for cold pitched roof is an excellent hydro-vapor barrier. By using it, the elements and structures of the attic room, made of wood, are protected from under-roof condensate, snow, wind, and atmospheric moisture.

Starting the installation of a protective barrier for a cold pitched roof, Izospan D is spread out and cut out. All this is done right on the roof rafters. The advantage of the material is that it does not matter which side to attach this isospan, which is very convenient.

Horizontal segments are mounted with an overlap, traditionally starting from the bottom of the roof structure.

Conclusions and useful video on the topic

Video #1 How to install vapor barrier in the house:

Video #2 The sequence of work in the arrangement of interfloor and ceiling floors:

Video #3 Demonstration of the process of laying vapor barrier film B to protect the roofing cake from domestic steam:

Laying a hydro and vapor barrier is an extremely simple process, but the protection they provide to structures is very effective. Defence from atmospheric water and household fumes - a guarantee of a long service life of the materials used in construction.

The key point in choosing a particular type of protection is the specific place and circumstances of its installation. In this regard, when purchasing material, you need to carefully study the acceptable options for its use.

Tell us about how you used Isospan brand insulating films in arranging an attic at your own dacha or in country house. Share useful information on the topic of an article that may be useful to visitors to the site. Please leave comments, post photos, ask questions in the block below.

Vapor barrier is used to protect various structures from moisture and condensate, 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. So, isospan vapor barrier is quite popular.

Specifications and types

Isospan vapor barrier is waterproof membrane which can be installed in all weather conditions. After vapor barrier, the building structure will last several times longer. At the same time, a comfortable microclimate will be maintained in the room.

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

On sale there are many varieties of vapor barrier, which have their own advantages and features.

  • Izospan A - vapor permeable membrane, protecting walls, roofs, facades and floors from condensate. At the same time, evaporation occurs inside the “pie”, so that the water does not damage the structure itself.
  • Izospan V is a two-layer universal vapor barrier, which is used only indoors. With the help of such material, you can protect the roof, walls, basement and attic. Izospan B can be used as a heater. This is due to the fact that the material has a high density.
  • Izospan C is a two-layer membrane with hydro-vapor barrier characteristics.. Such material is laid in attics, as well as on non-insulated roofs.
  • Izospan D - a membrane that provides reliable vapor barrier any building structures. Material used in the construction process concrete foundations, plinths and interfloor ceilings.
  • Izospan AM is a high-strength material made of a membrane film. Its 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 condensate.

Other varieties

On sale you can find less common types of vapor barrier.

Instructions for use isospan

When using this material, the specific modification must be taken into account. If we talk about isospan B, then with its help they 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 such a vapor barrier, you will be able to avoid the penetration of moisture or particles of insulation into the room.

Izospan C differs significantly from other vapor barrier materials the possibility of using 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. There is no condensation on the walls and ceilings of the basement floors, which means that there is no mold and unpleasant odor.

This modification is laid as follows:

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

General instructions for self-laying vapor barrier

Izospan materials are used to isolate surfaces from moisture. They demonstrate the necessary level of fire safety and, in addition, help to keep the heat inside the room. The consumer is presented with a wide selection of products that have the properties necessary for organizing high-quality insulation.

Properties

When waterproofing, Izospan is mounted directly on the rafters to protect the insulation from moisture accumulation. Also, vapor barrier film is used for thermal insulation of attic floors, ceilings, walls of rooms. A vapor-permeable membrane is applied to wooden structures to isolate them from the outside. Before buying a film, you need to understand what types the market offers in terms of characteristics and purpose. The range includes roll materials from non-woven fabrics produced in accordance with GOST. Differences in the supplied product can be traced not only in their density, but also in the structure.

The non-woven fabric membrane (to create a vapor-permeable barrier) is intended for external insulation of roofs and wall structures. The material protects against moisture and wind. In addition, the diffusion film performs another function - it does not condense moisture inside the wall structure. Izospan class A is impervious to water, easy to handle and able to withstand various temperature loads which increases the lifespan of buildings. In addition, it perfectly protects them from dampness, decomposition, mold and corrosion.

Such material is worth buying due to its high resistance to negative factors, strength and excellent technical characteristics. It can withstand power loads and not lose shape, as well as resist the influence of ultraviolet rays. The ease of installation will also please: the user will be able to independently install the barrier using the minimum amount of available tools. Izospan A is used to protect basements and attics. Its density is 110 grams per 1 square meter. It is produced in rolls 140 cm wide and 50 meters long.

General specifications:

  • excellent strength;
  • elasticity;
  • is not a source of harmful substances;
  • can handle high pressure.

The material withstands temperature changes from - 60 to + 80 degrees. The composition contains refractory particles that give it unique properties. Izospan A is a type of membrane that protects the surface of walls and ceilings from moisture condensation. Tensile strength - 190/140 mm, UV resistance - 3-4 months.

When installed on the roof, the material is cut into wide strips and applied in such a way that smooth surface stayed outside. Installation starts from the bottom of the roof. At the same time, when working with Isospan, contact with it should not be allowed, since the waterproofing properties in this case are significantly reduced.

The product is made from pure polypropylene. It does not absorb moisture, so it is acceptable to use the membrane for insulation of residential and industrial buildings.

Due to the existing properties, Izospan guarantees long-term protection for wood from decay, and for metal - from corrosion. It is especially important to use the material in regions with severe climatic conditions and increased wind loads.

The membrane perfectly retains not only moisture, but also guarantees the absence of a draft (if it was installed in compliance with building codes). The membrane has simple principle removal of moisture to the outside: the rough surface collects the steam generated in the room, after which it seeps out through the existing microperforation. The back side is smooth, so drops either roll down it or evaporate.

That is why it is so important to properly lay the material, without confusing sides: the rough surface of the film should always be inside, that is, turned to the room or insulation. If this requirement is not met, then the membrane will not work effectively.

Advantages and disadvantages

Material advantages:

  • strength;
  • reliability;
  • comes with flame retardant additives;
  • multifunctionality;
  • environmental Safety;
  • ease of installation;
  • vapor permeability;
  • resistance to high temperatures(suitable for use even in bathrooms and saunas).

Due to its structure, Izospan prevents the penetration of condensate into the walls and insulation, protecting their structure from the formation of fungus and mold. A lot of positive feedback ensured popularity of the material for many years. Izospan A is a film membrane impervious to air and moisture. Its use reduces drafts, prevents moisture ingress and helps to improve the quality of the indoor atmosphere. Additional use of a primer before laying the membrane on most building surfaces is not required.

Isopan A is an innovative material that contains components that make it suitable for use on surfaces with elevated temperatures. This is important in the construction of the roofs of baths and saunas. The unique properties make it possible to extend the construction season and ensure year-round construction of buildings in areas with a cold climate.

The product can withstand up to 12 months of direct UV exposure while maintaining the integrity required for long term construction projects. The material has more a light weight than competitive products. This property is irreplaceable when it is necessary to reduce the load on the structure. You can install long sections of the canvas, which will increase the speed of work on the object. The vapor barrier is installed horizontally or vertically, always with a crossing of the canvases by 5 centimeters.

Laying with an overlap avoids the appearance of drafts. The membrane is compatible with various building materials such as gypsum, plywood, OSB, cement board, concrete, CMU, sealant. You can save on the level of heat consumption, which allows you to install and use heating equipment in smaller rooms. Energy costs can be reduced by as much as 40%. The risk of mold and mildew is also reduced.

Among the main disadvantages it is worth highlighting:

  • poor moisture resistance;
  • small area of ​​application.

If too much water accumulates on the surface of the film, moisture will begin to roll inward. It is not worth using a single-layer film for a roof. In this case, a multilayer membrane is best suited. The manufacturer's instructions indicate that Isospan A can be used in roof construction, but it is desirable that the slope does not exceed 35 degrees. You should not purchase material if a metal coating is planned on the roof.

Application area

  • Manufacturers offer a wide range of materials. All types of Izospan differ in density, as a result of which they can be either laid on the floor of a frame house or used in the roof structure.
  • Izospan is one of the most popular types of insulation due to its price and unique properties. It is suitable for walls, ceiling and basement floors, attics and mansards. The hydrophobic sheet is widely used as a waterproofing layer on dirt floors, cement screeds in damp rooms and as a windscreen. Vapor barrier is one of the main advantages of the material.

  • Moisture-proof membrane can be used in the construction of a warm floor. The windproof function has significantly expanded the scope of the material. Depending on the operating conditions, it may be necessary to create a ventilation gap of 40–50 mm, due to which moisture is weathered. A feature of the canvas is the ability to reflect thermal radiation.
  • The roll material is not afraid of water, durable and easy to install, it is easy to use it in the attic. Widely used as a roofing vapor barrier for pitched roofs, as well as partitions. At the preliminary stage of the construction of the roof, the plates are installed between the rafters. The second layer of the film overlaps the top one by 15–20 cm without tension.

The Izospan instruction manual indicates the basic requirements for the use of the material.

  • It is desirable to avoid adhering of the strips to the edge of the ridge.
  • Be sure to create a ventilation gap (50 mm), which provides an air flow that contributes to the weathering of moisture.
  • All connections are processed with sealing tape.

Izospan with the AF marking is distinguished by the presence of ignition protection, so it is used in flammable rooms. The presence of the letters AM means a three-layer film construction that can protect the building structure from any external influence.

On sale you can find material labeled AQ. It is this film that has the maximum insulation properties.

Installation subtleties

Before using the Izospan film, it is necessary to check the insulation of the gaps between the insulation blocks, if found, eliminate the shortcomings. Carry out sealing of the contact points of the membrane with structural elements, for example, with windows. For vapor barrier walls, Izospan A is used on the outside of the building, and Izospan B is used on the inside. During the construction of walls, Izospan A is laid in layers on their surface. Work is carried out from the bottom up. Fixation is done with a stapler. In this case, it is necessary to exclude sagging of the canvas, otherwise, with a strong wind load on the facade, unnecessary noise (clapping) may appear.

During the installation of the roof, the material is cut directly on the rafters above the thermal insulation. Laying is done horizontally. Start from the bottom of the roof. Fastening is done with nails (sometimes self-tapping screws). It is recommended (but not necessary) to leave a space of about 5 cm between the underside of Izospan and the insulation, and a gap between the membrane and the roof, the width of which is usually equal to the size of the rail.

As noted above, the placement of Isospan begins from the bottom row with horizontal stripes. The overlap must be at least 10 cm. The places where the film adheres to the surface must be glued with mounting tape. This method is suitable for wood veneer.

It is very important to lay the material with the right side to the insulation. Before installation, you must carefully read the instructions for use of the canvas. For external insulation of roofs and facades of buildings, it is necessary to use the brands Izospan AND, AM, AS, which provide the necessary protection.

Different variations of Isospan A have and different density material. For model A it is 110 g/m², for AM it is 90 g/m². The AS model has an indicator equal to 115 g/m², and the highest density of the AQ proff is 120 g/m². To create a high-quality hydro- and vapor barrier, experts recommend using an additional Izospan V vapor barrier.

The installation scheme depends on the purpose of the structure. If this is a sloping roof without insulation, then the main structure is mounted, then the vapor barrier layer, and then the wooden flooring.

In the attic, floors are laid first, then vapor barrier, followed by insulation and slats, and lastly, a beam. When using a membrane concrete floor at the first stage, a base is created, then a screed, a film is laid on it, and then only finishing. If you want to achieve good results, it is necessary to strictly follow the manufacturer's recommendations, observe the subtleties of using the Izopan material and be sure to take into account the features of the surface on top of which the film layer will be laid.

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