WRB for retrofit
I have looked through the site and most of the WRB articles seems to focus more on new construction. We have an old 1940 house in Zone 6. Wall profile is some kind of reflective silver paper WRB over 30lb felt paper with ship lap 1×6′ for sheathing and balsam wool insulation ( .
We will be getting new siding LP Smartside. I am looking for any suggestions on a WRB to use with shipped lapped sheathing. For example, would I request they keep the existing felt paper and add a second layer? If I were to go with Tyvek can it be used over 30lb felt?
Any suggestions would be appreciated.
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