Tell Me If My Building Strategy For NE Texas Is Sound
I’ve been studying the different building and advanced framing articles and opinions here and where ever I can for some time now. We want to build an old style raised foundation (pier & beam) 1.5 story farmhouse style home in NE Texas, near Tyler. This is considered climate zone 3A Warm & Humid. Here is my plan which is keyed on being both cost efficient and building a relatively air tight and efficient home.
1. Raised foundation approximately 42 inches, vented crawlspace. 6mil vapor barrier ground.
2. 3 inches of open cell foam, R11.7, under 1st floor joists for insulation
3. 2×6 on 24″ centers exterior walls with R20 cellulose, 1/2 sheathing, house wrap (taped), 1/2 foam (taped) as a thermal barrier, furring strips covered in LP Smart Lap Siding.
4. Roof deck would get 5.5″ of R21.5 Open Cell Foam.
5. I’d love to use a standing metal roof, but due to budget will have to go with composite.
The house is designed to be oriented North and South with the attached garage facing to the West. There are eight and ten foot wide (deep) porches running along the front and back of the house.
Am I making any mistakes here ?? Any recommendations ?
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