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Topic - DIY concrete laying advice

gethin_allen on 27 Mar 2013
A bit of a random one for a climbing forum but the knowledge base here always amazes me.
I need to lay a small patch of concrete slab to finish off a repair to a drain in my back garden.
My issue is that the weather has taken a turn for the worse and the temp has dropped to the point that I'm worrying about frost messing up all my hard work.
Does anyone know a what temperature I should consider using a frost proofer additive? if these additives are compatible with other plasticiser/waterproofing additives? and if these additives have any major drawbacks?
The patch in question is a sheltered spot next to the house that will only get light foot traffic and I was looking to do a slab of ~2-3inches deep. The weather forecast predicts it to be ~6 degrees in the day dropping to 1 at night.
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