Insulating under footings?
Hello, I'm building a house for my parents in northern British Columbia. We are shooting for a superinsulated and air tight building. It's will be a story and a half, on an ICF foundation crawl space.
Planning on doing the GWB, 2x6 (structural/utillity chase, with either dense-pack cellulose or rock wool batts),1/2" ply (taped to become the vapor/pressure boundary) with a 12" Larson truss on the outside of that (dense-pack cellulose), then WRB, rainscreen, Hardiplank.
Planning on beefing up the ICFs with 6" of EPS on the outside, with also 6" of EPS under the slab.
Trying to figure out if the thermal bridge of the footing up the foundation wall is something worry about, or if having the EPS underslab wrap up to meet the interior side of the ICF wall is the simplest way to isolate the interior. Is that footing just cooling the concrete all the way up that foundation wall?
Thank you for you time.
Posted May 17, 2014 2:24 AM ET
Edited May 17, 2014 7:04 AM ET
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