Physical values ​​of carpentry KÖMMERLING

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profile systems are specifically designed to guarantee a tight seal that does not allow leaks. For this purpose, not only is the latest technology used, but rigorous tests and quality controls are carried out. CARPENTRY To share: Air permeability and water tightness In many tests, PVC has demonstrated its quality compared to other materials (aluminum, wood, etc.), both for its level of impermeability to air, rain, and for its resistance to wind and loads. As if this were not enough, the corners of KÖMMERLING windows are welded and not glued , offering complete tightness against water, wind and pollution. When we talk about airtightness there are two fundamental parameters that make the difference: Air permeability: Air permeability defines the amount of air that passes through a closed window or door and is measured.

Water tightness: The watertightness of closed joinery Country Email List  is defined as its ability to resist the penetration of water. All KÖMMERLING windows carry the CE Marking seal and in it we can see the levels obtained in both parameters in the official tests carried out in our carpentry shops. These tests are corroborated in independent laboratories of recognized prestige. KÖMMERLING windows obtain the best classifications according to the official classification established by current European regulations.Thermal transmittance indicates the amount of heat that is exchanged with the outside. In the entire façade of a building, the weak point is the openings, and it is especially important to choose the appropriate values.




CARPENTRY To share: Thermal transmittance Filed in: Technical features The thermal transmittance of the UH hole depends on two elements: the transmittance value of the carpentry (UH,m) and the glass (UH,v), depending on their surfaces (see formula). UH,m Profiles: their thermal transmittance depends on the material and geometry of the profiles. The Technical Building Code includes a table (based on the European standard UNEEN ISO 10077-1) with the U values ​​of the most common materials used for carpentry (PVC, metal and wood). These are the "default" values ​​that must be used in the absence of tests carried out by an officially recognized laboratory. PVC has a low thermal conductivity  about a thousand times lower than that of aluminum. For this reason, PVC profiles do not need to break a thermal bridge , since it is the entire profile that breaks said thermal bridge. The thermal bridge occurs in metal profiles, whose high conductivity makes them poor insulators. The U value of KÖMMERLING profiles is even better than that offered by thestandard table.