Alan Ambrose Posted Monday at 13:12 Posted Monday at 13:12 So, this holds the slab while it's setting and effectively makes a void later, protecting from heave? This assumes the trenches are deep enough, secure, never move, and are strong enough to handle differential movement?
Gus Potter Posted Tuesday at 21:00 Posted Tuesday at 21:00 Yes but you would normally have clayboard on one or both sides of the founds as well. Each case needs to be deisgned for the site ground conditions.
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