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We put cultured stone on our house last summer, but we weren’t able to do the grouting. We’d like to do it now so we can sell our house (we’re building a new one). The timing isn’t so great! Anyway, how long should we keep the temperatures of the grout above freezing, or ideally above 40 degrees, for it to cure properly? I called the grout company and they were useless and gave me no information.
We were planning to use scaffolding and concrete blankets to build a little heating tent around the walls since the rock only goes up about 3 ft.
We are in the Colorado mountains if that helps.
Some things I’ve seen recommend 24 hours, and others say 3 days! 24 hours seems reasonable. If its 3 days I might just lobby that we offer potential buyers a grout allowance.
Thanks!
Paula
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When we had trouble on a commercial job, a concrete expert was called in. During a break I mentioned that I was building a house and asked how long mortar must be kept warm in winter. He said "Above 40° for 14 days". If your grout is cementitious, it probably needs to be treated similarly.
Of course he was talking about concrete in structural applications.
If I were a buyer I'd prefer a grout allowance because then I'd know the job was done right, but other homeowners may not care about right, and think instant gratification is more important.