Is it ok to use a commercial warp over a fluid applied WB?
I am building an apartment building in Kirkland WA by lake Washington in a high wind location. Currently I am using a liquid applied weather barrier( Barritech VP by Carlisle). For additional protection from the wind driven rain and air intrusion, I would like to use an additional layer of warp such as Tyvek commercial warp over the fluid applied WB. My question is whether this is a good or a bad idea? would the combined layers allow or prevent any moisture that gets into the wall cavity to perm out? I am grateful for your help and guidance.
Respectfully,
Essy
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Replies
Essy, most WRBs are quite vapor-open, so your approach should be fine, but it would depend on the specific characteristics of each membrane, and other wall details. I would contact their customer support to see what they recommend.