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Tech shield application

pakrat1 | Posted in GBA Pro Help on

anyone see a problem with this combo?
zone 2
Using tech shield as radient barrier ( facing down toward foil on polyiso ) under (.30 sri ) shingles, over 3/4″ or 1″ inch vent channel over 5″ foil faced polyiso over grace I&W on 3/4 plywood roof deck. may add 2 to 3 inches of rockwool between rafters  to bring total up to R40
This is a conditioned attic

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