ELT-Kraft VCL Reinforced Four-Layer Paper 1.3x46m, 60m2

Vapor barrier insulation. Laminated four-layer construction cardboard with reinforcing polyester mesh. Used as breathable vapor insulation for walls and roofs. Especially recommended for timber frame houses or log cabins. Apply the material by overlapping 10-15 cm and sealing with Tyvek tape or Tyvek Butyl Tape. The properties of the material and the reinforcing polyester mesh provide easy installation and high mechanical resistance, which facilitates the blowing of eco wool. The service life of ELT-KRAFT VCL complies with the 50-year requirements set by the EU. Country of origin: Finland.

Vapor barrier films are the simplest and most commonly used construction films. They do not allow water vapor to pass through in either direction (outside-inside or vice versa) and are considered "non-breathable" films. However, this insulation provides protection against moisture, protecting both the thermal insulation material and the building structure. Vapor barriers are used for roof, wall, and floor insulation.

The range of these films on the market is very wide, and the quality of the products varies. Therefore, when choosing a vapor barrier film, several conditions must be considered. The external vapor barrier film looks like a regular film, but this is a deceptive impression. According to European Union (EU) and Latvian building regulations, the film must be at least 0.2 mm or 200 microns thick. It must be made of primary polyethylene (polypropylene) rather than with secondary polyethylene additives, as is often the case with many of the offered vapor barrier films. This can be noticed "by eye" - if the film has secondary polyethylene additives, sand grains, impurities, etc. will be visible, which will reduce the quality of the film during operation.

A high-quality vapor barrier film must be resistant to ultraviolet radiation. During the production process, a special chemical additive is added to the mass from which the film is made, which stabilizes the polyethylene molecules and prolongs the service life of the film. High-quality vapor barrier films are colorless or have a light, clear color (e.g., blue) rather than pigmented. The film material must be supplemented with a UV stabilizer.

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