Best detail for EPDM on SIP roof? Second Try
I’m surprised I didn’t get no even one taker on my question. Perhaps it’s because I posted it under the wrong Q&A Category (Energy Efficiency and Durability), so I’ll try again here.
I will be self-contracting my own residence. SIP walls and 1/4:12 slope roof, EPDM roofing material.
Unfortunately, when I have to explain to local builder/suppliers what a SIP is, any answer I might get locally does not seem reliable to me.
So I have searched the web to find how the best approach, is but no luck yet.
From my understanding, SIPs need to dry to the interior (gypsum board, no poly) and the exterior. The latter is the part I’m having trouble with. EPDM will not allow the outside OSB dry, right? Do I need to add a second roof deck over purlins, and apply the membrane on top? Any other ways to do this?
House to be built in Walla Walla, Wash. 99362
Thanks for your time,
GBA Detail Library
A collection of one thousand construction details organized by climate and house part