Creating conditioned space in the attic of a minimum pitch truss system
Wow! I have spent the last 2 hours reading on this site and the depth of knowledge is astounding. Most of what I have found about the subject has been in cold climates, but our concern here is heat not cold.
I will soon be building a home with a mix of 4:12 pitch and 3/8:12 pitch (flat) sections. I want to create conditioned space in the attic and achieve energy star certification. I was planning to use the flash and batt system (1 inch closed cell foam, R38 Batt) on the bottom of the roof deck, but after some reading here, I am a bit concerned. Is this a viable option for a dry hot climate (Southwest Texas), or should I skip the flash and just batt? Additionally, I am concerned about cooking the roofing. Is this a concern, and if so, what should I do about it?
2×4 wall construction with bib insulation.
tyvec house wrap with window wrap
4:12 sections will be roofed with concrete tile
3/8:12 sections will be roofed with a 3 ply hot mop system capped with rolled asphalt roofing
Elastomeric Stucco System
Climate zone 3B
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