Search found 2 matches

by drnamba
Tue Jul 27, 2010 6:35 pm -1100
Forum: Material
Topic: Vapor diffusion factor for plywood
Replies: 2
Views: 4910

Vapor diffusion factor for plywood

Dear Thomas: Thanks for the reply. I am studying the precipitation possibility of open cell spray urethan foam (icynene). If you would spray against the high diffusion factor plywood without vapor barrier room side, it would precipitates during the winter. Whereas if you use the low one, it seems to...
by drnamba
Sat Jul 24, 2010 5:40 pm -1100
Forum: Material
Topic: Vapor diffusion factor for plywood
Replies: 2
Views: 4910

Vapor diffusion factor for plywood

The vapor diffusion factors for plywood differ ten times.

That of Fraunhofer-IBP is 20(@RH of 1.0) vs that of LTH Lund University is 2.63(@RH of 1.0)

Which one should I use?