Do I need a Tyvek-type barrier?
user-7030272
| Posted in General Questions on
I am building g in nw ohio-zone 5- 2×4 walls filled with open cell foam and 2″ of foam (eps or xps ?) On the exterior of 7/16 osb sheeting. From what i’ve read, it seems like I do not need a tyvek type barrier. Not sure if I’m understanding that correctly and would appreciate further clarification. Thanks
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User-703etc.
First of all, can you tell us your name?
Every wall is required by code to have a water-resistive barrier (WRB). It is not optional.
Your WRB will usually be housewrap (for example, Tyvek), but in some cases you can use rigid foam as a WRB. For more information on these issues, see these two articles:
All About Water-Resistive Barriers
Using Rigid Foam As a Water-Resistive Barrier