Material data for GV35

[IWK]

I am in need of sd-values for GV35 material (bitumen paper).
As I have seen in the wufi material databases there are no entries for bitumen at all.
Bitumen coverings are often in use in existing buildings.
For any calculation of existing roofs with bitumen covering such data are important.

Are there any data available?

[Christian Bludau]

Hello IWK,

check the generic materials, there you can find a roofing memebrane V13, which is a bituminous felt. sd-value is 100m, if you need another sd-value, you can just adapt the water vapour defusion resistance factor.

Christian