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Concrete below freezing

Posted by WA Joe on October 31st, 2000 07:53 PM
In reply to Pouring cement footings below freezing by Dave Larson on October 31st, 2000 03:48 PM [Go to top of thread]

In my somewhat limited experience you are fine to 28F or so, much below that I've seen them add calcium. I suggest talking to your local concrete company.
When you say -5 to 20F...if that's outside temp, would the crawl space temp not be higher? Also if it is a confined space you could temper it with some space heaters.
Also the ground temp in a closed space will definately help to keep it warmer.....Joe

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