Izospan A: features of use and laying rules. Technical characteristics and methods of application of isospan Technical characteristics of isospan in

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-roof 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 weathering 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 design 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

Wind-moisture protective vapor-permeable membrane
Izospan A is used to protect roof and wall elements from wind and condensate during the construction of buildings for any purpose. The membrane is installed under the roofing or outer wall cladding on the outside of the insulation. The outer side of Izospan is a water-repellent smooth surface. The inner side has a rough anti-condensation structure designed to trap condensate and then evaporate its droplets in the air stream. Izospan A does not allow condensate to penetrate from the external environment into the insulation and structure, and ensures moisture weathering.

When using Izospan A, the heat-shielding properties of the insulation are significantly improved, and the service life of the structure is increased. Made from modern polymers, Izospan A has a number of advantages over conventional materials:

ease of use and high mechanical strength;
environmental safety, the absence of harmful substances in fumes;
long-term preservation of properties;
high resistance to bacteria and chemicals.

Application of Izospan A materials

In the design of the insulated roof

Izospan A is used as an under-roofing wind-moisture protective membrane for the installation of insulated roofs with an inclination angle of at least 35 °, covered with profiled sheets or tiles - bituminous flexible, natural, metal tiles. The membrane is installed under the crate over the rafters with a gap above the insulation. It is designed to protect structures and insulation from the formation of under-roof condensate, additionally protects the roof and insulation from wind gusts.

Note: Izospan A cannot be used as a temporary roof!

In the structures of the walls of buildings with external insulation

If the walls of a low-rise building have a frame, panel or combined structure, and are sheathed with siding, clapboard or panels on the outside, Izospan A will perfectly protect them from the effects of wind and atmospheric moisture. The membrane is installed on the outer side of the insulation directly under the skin.

In the structures of ventilated facades of multi-storey buildings

Izospan A is used to protect insulation in ventilated facade structures of multi-storey buildings with external insulation. The material protects the insulation from wind, atmospheric moisture and snow penetrating into the ventilated gap under the outer lining, and helps to remove moisture from the insulation.

Installation instructions for Izospan A materials

Izospan A, when installing an insulated roof, is rolled over the insulation and cut directly on the rafters (Fig. 1.2). Installation is carried out with an overlap of horizontal panels, starting from the bottom of the roof, with the smooth side outward. The panels must overlap each other vertically by at least 20 cm, horizontally by at least 15 cm. A ventilation gap of 5-8 cm is left in the area of \u200b\u200bit adjoining the roof ridge. , on screws or nails. On the counter-rails, a continuous boardwalk or lathing is installed (depending on the type of roofing). In order for the condensate to be able to ventilate, ventilation gaps are provided - between the insulation and the moisture-proof membrane and between the roofing and the membrane. Both gaps are 3-5 cm. It is unacceptable for the membrane to adhere to the insulation - this reduces the waterproofing properties of the material. The membrane material is fixed in tension, with a sag of no more than 2 cm. The lower edge should allow moisture to freely roll into the gutter. In order for condensate and water vapor to erode, the under-roof space must be ventilated. For this purpose, ventilation openings are placed in the ridge area and in the lower part of the roof, providing a consolidated air circulation.

Note: Izospan A should not be used as the main roof covering. For temporary protection of structures during the construction period, Izospan D can be used.

When erecting walls of low-rise buildings with external insulation (Fig. 3.4), Izospan A is mounted on top of the insulation on a wooden frame, starting from the bottom of the wall. Membrane panels are arranged horizontally, fastened with galvanized nails or a construction stapler with an overlap, with a minimum overlap of 10 cm along the vertical and horizontal joints. Counter rails are stuffed between the membrane and the outer skin of the building, providing a ventilation gap of 3-5 cm (for the thickness of the rail). It is necessary that the lower edge of the membrane ensures the removal of moisture to the drainage basement drain of the building.

When using Izospan A membranes in the construction of multi-storey buildings with ventilated facades, the material is placed with the smooth side outward over the insulation on the outside of the ventilation gap. Installation is carried out in accordance with the type of cladding and the installation system used. Of great importance is the tight fit of the material to the insulation, strong attachment to the elements of the mounting system. There should be no loose areas and sagging of the material. This can lead to acoustic “pops” due to high air movement in the ventilated gap in windy conditions. The placement of the panels should be carried out in such a way as not to prevent external moisture penetrating under the skin from flowing down in a natural way.

The Stroymet company offers a favorable pricing policy both for waterproofing and vapor barrier Izospan, and for other types of products - ondulin, basement, vinyl siding and other materials.

Izospan is a membrane film used during construction to protect load-bearing surfaces from wind, moisture and steam. The material differs in characteristics and technical properties depending on the type and purpose.

Izospan insulation is made of polypropylene, resistant to mechanical stress, low and high temperatures, mold and mildew. The film is characterized by a long service life and environmental safety.

Izospan vapor barrier is used to insulate roofs, walls, is used in elements of attic floors, is laid on concrete floors under a cement screed and flooring. Films are divided into 4 groups - A, B, C, D, each of them is used for a different purpose.

The building material has an undeniable advantage - it is versatility in use and ease of installation. The vapor barrier is certified and complies with GOST of the State Construction Committee of the Russian Federation.

Waterproof film

Izospan, which protects structures from wind and moisture, is presented in several modifications:

Vapor-permeable isospan A - the technical characteristics of this type of material allow it to be used to protect frame walls and roofs from wind and atmospheric moisture, condensate. On the outside, the film has a smooth, water-repellent coating. The reverse surface is porous, it helps to remove vapors from fibrous insulation materials.
Isospan AS brand has the form of a three-layer, vapor-permeable membrane film with increased water-repellent properties.

Izospan AF protects against wind and moisture, does not burn. This type of film is intended for use in the insulation of buildings made of flammable materials.
The two-layer isospan AM has high water-repellent properties, thanks to an additional layer, the possibility of damage to the material during installation and construction work is excluded. It is recommended for the arrangement of pitched roofs and load-bearing structural elements, insulation of attic floors. The film ensures the removal of vapors from the insulation, protects the room from weathering and accumulation of moisture from under the roof space.

The difference between the films lies in the density of the material, breaking capacity, vapor permeability and hydro-repellent properties. The most dense is isospan brand A and AF (110 g / m²). The AS film has the maximum waterproofing ability, and the AF modification has the least steam transmission.

Metallized films

Izospan with a metallized layer is designed to reflect infrared radiation, thanks to this property not only protection from moisture and wind is achieved, but also excessive heating of the building in hot weather is excluded.

Polypropylene film FD is used for laying a protective layer during the insulation of roofs and walls. The material has a high resistance to tearing and mechanical damage.
Isospan FX film is used as a base for underfloor heating with infrared heating.

Isospan FS modification is a budget option, has a lower density. At the same time, the material retains vapor and waterproofing properties. The film is also used as an infrared screen.
Izospan FB has a high vapor resistance, is designed to isolate baths, steam rooms, saunas and other rooms with high temperatures and condensation. Buildings must be mechanically ventilated.

The difference between metallized films is in density, breaking load and vapor permeability. The thermal reflection coefficient for all types of isospan of this group is the same.

Vapor barrier films

A type of film designed to protect external and internal surfaces from steam and moisture, it has a laminated outer layer and a porous inner side. The special structure allows the collection of condensate and prevents it from evaporating. Thanks to this, moisture does not accumulate on the walls, there is no steam in the room, the walls do not get wet.

Izospan C vapor barrier has high protective properties, can be used for insulation of unheated premises as a substrate for laminate flooring, insulation under the roof. The film is able to prevent even leakage in places of loose installation and defects in the installation of roofing.
According to the instructions for use, isospan B is used to protect attic roofs, insulation materials from moisture, steam, fungus and mold. The material prevents the penetration of vapors from inside the room, and also isolates the living space from the penetration of particles of wall and roof insulation. Suitable for vapor barrier of premises from any building materials, installation of attic, interfloor and basement ceilings.

Universal isospan D has a high density, is able to withstand significant mechanical loads. The film is used in any building elements to protect roofs, walls, floors and wooden floors of attic spaces. This material can be used in the arrangement of flat and pitched, non-insulated roofs, foundations, basement structures.
The DM modification includes vapor barrier, moisture-resistant, anti-condensate and heat-reflecting properties. This type of isospan has a wider scope than brand D.

The innovative material is a variety of isospan film RS and RM. Their distinctive feature is an additional reinforced layer of polypropylene mesh. Due to this, the breaking capacity is increased, the canvas can withstand high mechanical loads.

During the construction of frame walls, isospan B is used, the material is laid on the inside of the mineral wool to the supporting elements of the frame using a stapler or nails. The film is fixed with the laminated side to the insulation, the panel is laid from the bottom up with an overlap with a margin of 15–20 cm. For greater tightness, the material is fastened together with a special isospan SL tape. Galvanized profiles are mounted on top to strengthen drywall with a ventilation gap of 4–5 cm.

For the construction of a non-insulated pitched roof, isospan D is used, which provides hydrovapor barrier for structures. The material is laid on wooden roofing rafters, which side to lay the film on does not matter. The panel is fixed, starting from the bottom of the pitched roof, in a horizontal direction, with an overlap at the joints of 15–20 cm or more. It is recommended to glue the seams with a double-sided connecting tape of the Izospan brand KL or SL. The vapor barrier is fixed to the rafters with a construction stapler. A boardwalk is mounted on top for further laying of roofing material.

Instructions for using isospan B during the construction of a pitched insulated roof: the film is strengthened from the inside of the insulation to wooden rafters. The smooth side should fit snugly against the insulation material, the rough surface remains at the bottom. Installation is carried out from the bottom up, in a horizontal way of laying. The panels are overlapped with a margin at the joints of at least 15 cm. Double-sided adhesive tape provides additional tightness at the seams. In places where isospan comes into contact with metal, concrete and other surfaces, the surfaces are glued with one-sided ML proff tape.

For the installation of attic floors, a vapor-permeable hydro-, windproof film AM or AS is used. The membrane is laid on top of the insulation with the light side inward and fixed with a stapler. The overlap of the panels should be at least 15–20 cm. Counter rails and flooring are laid on top of the isospan.

Izospan is a universal building material that can be used to protect walls, roofs and floors from moisture, wind, internal steam and condensate. Films have high wear resistance and long service life.

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 useful tips here.

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. There is also an isospan of universal application. In any case, its use makes it possible to significantly prolong the operation time 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 by 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:

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.
BUT- the best view in terms of vapor permeability.
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 different types of bases. 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 heat-insulating, waterproofing, windproof membrane is the protection of the frame wall of 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:

The roll is unfolded and cut into panels of the required size.
Alternately, segments of the membrane are placed on the frame horizontally overlapping with the even side outward, starting from the bottom, and moving upwards.
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.
The material is additionally strengthened. To do this, stretched panels are pinned to the rafters with a construction stapler.
To seal the overlap, the joints of the panels are fastened with 2-sided isospan KL tape.
A self-adhesive tape is laid in the attachment area.
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 the role of a supporting 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:

The roll is rolled out and cut directly over the insulation.
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.
Strengthen the membrane along the rafters with a stapler.
The joints are fastened with a solid 2-sided adhesive tape isospan KL.
The traces of fastening with nails or self-tapping screws are closed - they are glued with a self-adhesive strip along the rafter legs and other elements. This is especially true for roofs with a slight slope - up to 22⁰.
Vertically fasten wooden antiseptic slats 4 x 5 cm over the tape along the rafters.
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 plasterboard sheathing - galvanized profiles

The interior trim is attached to the wooden base 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 between the finishing material of the ceiling - the 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. Mounted between the ceiling trim and the 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 final floor and the layer of vapor barrier, between the material of the final 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 a cold pitched roof is an excellent hydro-vapor barrier. By its application, 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 household steam:

Laying a hydro and vapor barrier is an extremely simple process, but the protection they provide to structures is very effective. Protection against atmospheric water and household vapors is 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 Izospan brand insulating films were used in arranging an attic at your own dacha or in a country house. Share useful information on the topic of the article that may be useful to site visitors. Please leave comments, post photos, ask questions in the block below.

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 works 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	132		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

Useful 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.