Installation question for vertical metal siding (reverse standing seam) over Tyvek
house under construction in coastal zone 3 (2-story 2×6 wood framed). Exterior walls are 1/2″ plywood
w/tyvek housewrap. Owner wants to install vertical metal siding (reverse standing seam “rustwall”) over tyvek house wrap and is concerned about the heat build-up melting the tyvek. I have been asked to advise whether to
1: take the tyvek off and start over with a better detail (I typically detail 1″ polyiso w/ a weather resistive barrier over that and then a vented air gap w/battens to hold off the siding
2. come up with another detail to keep the siding off the tyvek.
Up in the hills (bonny doon, CA) facing south and west about 10 miles from the ocean.
any thoughts would be greatly appreciated.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part