Why Doesn't Bubble Foil Insulation Pop under Concrete?

Why The Bubbles Don't Pop Under Concrete Why The Bubbles Don't Pop Under Concrete

Won't the bubbles pop in the foil insulation?

We heard this recently on a large concrete pour. This question comes up now and again. For the math inclined here's a brief sketch regarding concrete weights per square inch for a 6" slab. The bursting strength measured in pounds per square inch for foil insulation ranges from 60-160 psi.

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