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Tried a 'fast set' mortar on a chimney repair in November, got a real surprise
It was a simple repointing job on a chimney crown up in the Poconos. Supplier talked me into this new rapid-setting mix, said it would cure in an hour even in cold weather. Ngl, I was skeptical but figured why not. Mixed a small batch, started working. Stuff set up so fast I barely got it on the trowel. Had to throw the whole batch out after about 8 minutes. Learned the hard way that some new things just aren't worth the hassle on a small, detailed job. What's the fastest-setting mix you guys actually trust for winter work, or is it always better to just wait for a warmer day?
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tessa_murray2mo ago
My uncle's a mason in Vermont and he swears by adding calcium chloride to a standard type N mix for cold weather. He says it cuts the set time by about half without going crazy fast. He did a foundation parge coat last December when it was 38 degrees out and it worked fine. The key is to only mix tiny batches, like just enough for your hawk. I'd be scared to use a dedicated fast set product after hearing your story.
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spencer_park262mo ago
Your uncle's Vermont trick with calcium chloride, what's the exact ratio he uses?
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hannah4002mo ago
Check if the fast set bag was stored somewhere damp before you used it. That stuff can start curing in the bag and ruin your whole day.
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