Double stud wall review
I’ve tried to summarize a lot of good ideas of double stud wall. Could you please check for mistake?
I understand that details are important as a concept, and a “small” mistake could ruin everything, like no weep hole in brick for instance. But with a mistake in concept there are no success even with good details. 😊
Climate zone 6A: (Köppen: Dfb)
Location: Blue Mountain, Ontario
Not much rain, about 38” annually
Windy, up to 40 mph / 65 kmh.
Wall structure (exterior to interior):
1. Brick or stucco (don’t know that’s better)
2. Air gap (1×[email protected]” or 16”) (or rainscreen mat or additional 3d house wrap over liquid WRB?)
3. Liquid-Applied WRB (R-Guard Cat 5, STO Gold or something like this)
4. Plywood (1/2”) CDX
5. External framing (2×[email protected]” OC), filled by rockwool batts
6. Space (~11”), filled by blow in cellulose or fiber/cellulose batts
7. Plywood (1/2”) CDX or OSB (5/8” or ¾”), seams taped from outside. Worked as structural an as vapor barrier instead of poly. /Once again, I’m in Canada, hope it could replace 6 mil of poly./
8. Internal framing (2×[email protected]” OC as load bearing and service cavity)
The main idea is to replace internal poly to plywood as smart and untouchable barrier from the basement to the roof and doesn’t matter how many holes in drywall would it has. Also, it should be easy to build, check and save while building in process.
The R-value should be about 40+, but it could be easily adjusted.
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