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When to backfill a foundation?? 1

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tocida

tocida

Electrical
Joined
Apr 2, 2003
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After a foundation wall is poured what is the recommended time frame before backfilling?
 
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You should get 70% of your 28 day strength in about 14 days. It depends how high you're backfilling also but I would say a minimum of 14 days.
 
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It also depends on how the wall was designed. If it is a cantilever wall you may be correct. However, if it is a restrained wall and utilizes the slab above for support, I wouldn't recommend backfilling until the upper slab is in place and has reqached specified strength.
 
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