Fine cracks in top coat render

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Haveagoharry

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Hi Everyone, your advice appreciated.

I'm doing some sand cement two coat render on to new block work and I'm following the guide that 'Sticky' gives on this web site but I'm getting fine cracks in one or two areas of the top coat. Initially, I though it was because I was laying it on too thick but then I had the same cracking in other areas which were thinner.

I know it's very difficult to give advice on this without seeing the job but is there anything obvious that might be causing it?

Would it pay me to dampen the top coat to try and stop it drying out too quickly?

Cheers.
 
Where are the cracks, sand cements brittle I don't think I've seen a wall done with no cracks
 
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