The u-value of our attic ladders
Previously the U-value has been specified as a calculated value from a calculated value at the middle of the trapdoor. This is a theoretical value that does not take into account the heat loss in cold bridges such as the frame in the trapdoor and casing.
In energy calculations, you use the real value of the entire building component. Therefore the U-value of our attic ladders is tested by hte leading German test institute for building materials "IFT Rosenheim".
The u-value of our Click Fix models
The U-value of Click Fix is tested by the leading German test institute for building materials "IFT Rosenheim" and it´s the lowest in the European market.