mo-thu: 8u30-12u and 13u-17u

fri: 8u30-12u and 13u-16u

+32 11 18 21 21 (B)

+31 85 065 39 29 (NL)

  mo-thu: 8u30-12u and 13u-17u; fri: 8u30-12u and 13u-16u   +32 11 18 21 21 (B) +31 85 065 39 29 (NL)

Select your language

We are closed from the 12th of July until the 3rd of August 2025.
Happy holidays!  

Parabolic dew point calculation

If you still use a vapour diffusion calculation and you get a linear cooling as a result, you can ignore it completely. These are programs from the 70’s, where you hit the dew point in the centre of 4 cm insulation. Today houses have to be energy neutral or even passive with 20 – 30cm insulation. Then the centre of the construction really doesn’t get over the dew point anymore.

NEN-EN-ISO 13788 is a European norm in which the Glaser method is explained.

There are no requirements set for internal condensation by the Bouwbesluit; the determination method is therefore not controlled in the Bouwbesluit.

Do the necessary measurements in a construction yourself and calculate where the dew point is reached. This way you can determine yourself you don’t get a linear cooling, but always a parabolic cooling with a dew point in the final 2cm of the outer insulation layer. This then gives a lot of execution options.

change in temperature

pur