Decisive for the thermal insulation of a complete window (Uw) are the materials used for the frame (Uf) and the glazing system. Vinyl window systems from SIP can achieve exceptional thermal insulation, even suitable for passive solar houses, thanks to the low thermal conductivity of PVC and the intelligent design of the profiles (chambers).

That means that those who choose vinyl windows from SIP are prepared for the requirements of tomorrow – today. So that heat stays where it should.

Thermal insulation

Energy performance is the catchword for new buildings and renovations.

Specifically, this means that CO2 emissions are to be reduced by 21% until 2012, compared to 1990 levels. That is why the German Energy Saving Ordinance (EnEV) was amended on the European level and was adapted in 2006 to meet all the requirements of the Energy Performance Building Directive (EPBD). Currently affected are all measures, pertaining to the planning and execution of construction projects, that influence the energy performance requirements of a building. The building concept must achieve building-specific performance levels while complying with the minimum thermal insulation requirements of the individual components. Regarding the installation of windows and doors, this means that the thermal insulation must be adapted to the building concept. For new buildings, for example, no specific thermal transmittance coefficient (U-value) is required for windows and doors; instead they are required to be free of condensation. For renovations, one the other hand, the thermal transmittance of a window or French door is limited to Uw = 1,7 W/m²K.