Minimum bitmac thickness - Minimum layer onto existing concrete

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nix
Posts: 1
Joined: Wed Mar 22, 2006 2:33 pm
Location: Durham

Post: # 11244Post nix

I have recently converted a barn and the original yard of approx. 300m2 of concrete has seen better days. There are weeds coming through cracks, hollows which become puddles and where I have laid drainage there is a patchwork finish.
To make it look good to the eye I was thinking of a surface of bitmac to finish it off.
The problem: I have only 150mm to the DPC, thus the problem of layer thickness, also, would it be possible to lay bitmac directly onto existing concrete with a membrane to stop cracking..?
Is there better ideas regarding products/cost saving?
Any advice would be greatly appreciated...

Tony McC
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Location: Warrington, People's Republic of South Lancashire
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Post: # 11327Post Tony McC

You need someone to take a look at the site - there are so many "variables" that need to be taken into account when determining how to re-surface an existing yard.

In theory, you could use a 20mm overlay of bitmac, which would reduce height to DPC to just 130mm, but you'd probably get away with that. Using a cementitious scratch coat with a resin bonded surface would also be worth considering.
Site Agent - Pavingexpert

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