ZERH construction detail questions
I am a homeowner/builder who is planning to build a certified ZERH [Zero Energy Ready House] in the next few months (breaking ground in late July/early August) in Dallas (CZ3A – warm/humid). Pre-fabricated wall panels (2×4 frame sections) and pre-fabricated roof trusses will be used. My main goal is to get the ZERH certification using “simple” assembly processes and economical materials (“simple” meaning techniques that the local labor force in Texas can perform).
Over the last year or so I have been researching different aspects of the wall and wall-to-roof details. I have drawn them in AutoCAD (see attached) and wanted to get some feedback from the GBA community; specifically:
1. Should I attempt to “air seal” the OSB wall joints AND ZIP-R joints or just liquid seal the ZIP-R joints?
2. Are the Heckman brick ties over-kill?
3. What are the benefits/drawbacks to Prosoco FastFlash vs. ZIP Liquid Flash?
4. If I air seal behind the York Flash-Vent do I need to mess with sealing the sill area gap (between the OSB/Zip-R and foundation) with a liquid flash product?
5. On the wall-to-roof detail: What is the best way to attach the ZIP-R section between the rafters/trusses (currently shown held up by liquid flashing)?
6. Have I committed any building science “fouls”?
GBA Detail Library
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