Like I said, possibly overkill for a fence post. But while moisture is present and full strength hasn't been achieved there is a risk of cracking. The bag says minimum 10C for a reason.
Thanks for the replies.
I phoned Hanson and they told me they produce two types of postmix - fastset and postfix. Both go hard in under 10 mins.
fastset contains high alumina cement, postfix doesnt. I have the postmix which is fine to use with the frostproofer.
I added 250ml to the water...
Thanks for the replies.
The additive was only £5 and the postcrete instructions said min 5 degrees C.
When I bought it I thought I could just throw a bit in for extra protection.
I've just noticed it also says Do not use with high alumina cement :rolleyes:
but Sika make another product called wintermix that doesn't have this limitation..
It has the same dosage rate so the question is still valid.
at 2.5 litres per 50kg, this would work out at 170ml for 3.3 kg cement...
I need to replace e couple of fence posts and with it being cold at the moment (2C daytime and -3C night) I planned to add a bit of Sika Frostproofer to the postmix.
I have hanson postmix which requires two litres of water. I plan to quickly mix in a flexibucket then chuck it in the hole...
thanks.
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There is about 40mm between the top of the tiles and the floor under the carpet.
I've used carpet ramps before, but they only seem to go up to 18mm. And stepped transition strips max out at 20mm as well.
e.g...
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