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Does insulating a slab on grade make the building less stable?

Nicolas Jalbert May 28, 2018, 4:56 p.m.

I want to build a 24 x 26 garage. I would like to do a slab on grade for the obvious savings of not pouring the 4' frost wall and wante to do infloor heating. Since the slab need to be insulated all around, a builder told me he would not recommend that due to the entire weight of the building resting on the insulation sandwiched between the ground and the slab. What do you think? 

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