Faced Batt fiber glass insulation

[TSkopic]

How does you account for the kraft paper on faced fiber glass insulation?

[Christian Bludau]

You can build it in as a layer with the corresponding water vapor diffusion resistance/ permeability or you can account for that in the boundary conditions as a surface sd-value.
Christian

[TSkopic]

What would you say the corresponding water vapor diffusion resistance/ permeability would be for this material?

[Christian Bludau]

That depends on the material... we have one in the database in the catalog "generic materials". I t has a sd-value of 3 meter. Best way would be to check that values in the materials datasheet or contact the producer.

Regards,
Christian

[TSkopic]

Christian,

Thank you. For some reason, I did not check "generic materials", go figure...