Cedar Impressions over 2 inches of rigid foam?
Has anyone installed Cedar Impressions perfection shingles over 2″ of rigid foam? Certainteed says that you should only apply directly over 1″ of foam, but the client is looking for 2 inches and furring everything out would add significant cost and complexity to the project.
With the client’s consent, I’m considering applying the siding directly over the foam and using longer nails to ensure appropriate penetration into the studs. I realize the corners may take some thought to hit the studs, but can anyone think of something else that I am missing? Has anyone done this before?
Also any thoughts on using TYVEK drainwrap as a WRB instead of TYVEK homewrap between the sheathing and rigid foam would be greatly appreciated.