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Can you insulate an existing slab on grade floor?
Posted by Patrick Berkeley
Dec. 31, 2020, 10:14 p.m.
Foundation and basement improvements
5 Responses
We prefer a slab on grade over a basement for a bunch of reasons, and this page here is written specifically to address your question, so start here –
How to choose between a slab on grade and a basement
However, is your lot sloped in a way that creating a flat surface for a slab is a problem? If so, the Legalett prefab slab on grade with air heated floor we built could be a good solution for you as well, and they do ship across Canada and the US. Where are you located? And I think that system would be particularly advantageous if you did want to create a foundation with a walk out basement.
Legalett provides raft slabs which are engineered to spread the weight evenly, so the are much more solid and not prone to structural cracking like standard concrete slab floors. So, you could pour the slab then seat an ICF Foundation wall on it, leaving you with a basement thoroughly insulated with no thermal bridging and a reduced chance of mold forming compared to standard basement construction methods.