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What is the best way to build a slab on grade on bedrock?

peter owen Published: Oct. 31, 2019, 3:33 p.m.Last updated: Dec. 1, 2019, 8:17 p.m.

I watched your videos with much interest but wasn't sure about the "trench" type perimeter "grade beam" in terms of supporting the house structure, and the fact that I have bedrock (Lake Huron / limestone) 18" below the surface. Wouldn't a poured perimeter wall down to bedrock be a better approach - before pouring the slab?

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