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Is it ok to use a commercial warp over a fluid applied WB?

user-7020549 | Posted in Energy Efficiency and Durability on

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

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Replies

  1. Expert Member
    Michael Maines | | #1

    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.

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