Under-roof vapor-permeable foils or membranes are an obligatory part of today's modern construction. It was once accepted that roofs were built with two ventilation layers, with the only requirement for under-roof coverings being primarily watertightness, i.e. protection against the penetration of rain and snow. Therefore, it was possible to use bitumen vapor-permeable coatings, as well as other vapor-permeable foils. The modern style of roof construction, and with it the use of thermal insulation materials and accompanying elements, imply the use of high-tech materials that guarantee the durability of the structure.
WHAT ARE COVERING FILMS USED FOR?
Under-roof foils act as a vapor barrier. They prevent the sudden penetration of water vapor from the heated room into the roof structure, where it can condense. If you use the under-roof space as a place to live (and not as an uninhabited attic), with your daily stay in it and with all your activities you create water vapor, i.e. moisture (cooking, bathing, ironing, washing, drying clothes, etc.). When the moist and warm air from inside the room passes through the cavities and cracks in the structure to the colder areas of the site, the water vapor in it can turn into water. This condensation is an ideal environment for fungi and mold.
Depending on the location, size and depth of penetration, the building elements in the immediate vicinity of this location may be damaged. Moreover, if moisture penetrates the insulation material, its insulation properties deteriorate compared to dry material. Reduced thermal insulation properties lead to the accumulation of moisture in the structure, causing a chain reaction that inevitably leads to serious damage to it. The vapor barrier controls this process and is therefore installed under the insulation, i.e. on the inside.
The vapor-permeable waterproof membrane prevents the penetration of rain and snow into the roof structure, but also allows water vapor that may have penetrated the roof structure of the living space to pass through it unhindered to the outside.
WHEN DO WATER VAPOR AND CONDENSATION APPEAR?
Water vapor occurs when water evaporates at any temperature (the rate of evaporation is affected by temperature, air flow and the amount of water vapor present in the air). In the presence of water vapor, a process called water vapor diffusion occurs. Water vapor diffusion is a phenomenon in which vapor molecules move from a place of higher concentration (higher pressure) to a place of lower concentration (lower pressure) with a tendency to equalize. Water vapor diffusion is desirable for improving comfort in a living space and does not cause harmful consequences for building elements, except in the case of condensation.
Water vapor condensation occurs in two cases: when the air becomes supersaturated with water vapor and when the saturated air cools (a phenomenon known as “condensation”). The problems of water vapor diffusion and condensation are directly related to the vapor permeability of the material.
SEALIKE WELL - VENTILATE PROPERLY!
Excessive air circulation leads to unnecessary heat loss and deterioration of comfort as a result of the circulation of cold air.
Strict building regulations that require better energy efficiency put the issue of tightness at the forefront.
The goal should be “seal well – ventilate properly.” However, buildings should not be oversealed, and moreover, they need to be properly ventilated.
To ensure proper sealing, everything must be taken into account during the design phase. It is much simpler to design and build a sealed living space than to carry out additional renovations in a damp house.
WHAT DO WE OFFER?
With us you can find under-roof vapor-permeable foils in the form of rolls from the CLOBER brand, suitable for both ventilated roofs and vapor barriers. The rolls are 50 m long. The differences are in the weights and widths of the rolls, which also determines the variability in the coverage characteristic.
The membranes allow controlled passage of water vapor through the thermal insulation without condensation. The foils have high water resistance and are equipped with markers. They are made of three layers of polypropylene.
Our foil prices are affordable and you can find out more upon inquiry.
TRUST KLOBER, TRUST GERMAN QUALITY!
Founded in 1960, today the KLOBER company has become one of the leading manufacturers of roofing accessories. KLOBER has an extremely wide range of products sold worldwide. The company is an instrument for innovative products on the market: from vapor-permeable foils and dry installation elements to snow retention accessories and room ventilation solutions, widely used in modern construction. A combination of performance, high German quality and design is what characterizes KLOBER products. Solutions are available for all types of tiles known on the market.
For nearly 60 years, KLOBER has been providing the world market with a wide range of professional roofing accessories. The products with the German brand are certified in all European countries, as well as in countries from North America, Russia, Turkey, South Africa, Mexico, China, Indonesia, Malaysia, India, Thailand, Brazil. With a guarantee of quality, backed by decades of experience, technical competence and attention to detail, the German company has established itself as one of the most reliable and respected partners in modern construction.
The roof is the part of the building that is most exposed to various external and internal influences. The main function of the pitched roof is to reliably protect people, belongings and the building itself from the negative impact of the environment, in particular from precipitation, solar radiation, heat loss and, last but not least, to ensure the unhindered passage of water vapor and its removal through and outside the roof system.
The ability to "breathe" (vapor permeability) prevents condensation in the roof structure. It is achieved with the correct choice of materials that make up a complete roofing system. It is achieved by choosing KLOBER products.
