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Grade on slab, 2" Foam Insulation - XPS, Required 3" termite inspection gap???

2K views 0 replies 1 participant last post by  rmtbrown01 
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Grade on slab, 2" Foam Insulation - XPS, Required 3" termite inspection gap???

I am planning a new construction steel building with grade on slab in a different state (WA). The building will use in floor heating as the main source of heat so I want to insulate the bottom and sides of the slab with 2" XPS foam.

Apparently some states require a 3" termite inspection gap, I do not know if WA does but termites are apparently active in all parts of WA.

What is a 3" termite inspection gap and how is it constructed?

Does anyone have any pictures?

Are there any good alternatives with a high R value that would avoid this issue and better insulate the full slab?

Does WA require a 3" termite inspection gap and is it necessary on steel construction residential homes?
 
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