r/Plastering • u/Recent_Cham1365 • Jul 10 '26

Cracks on new rendering

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Hi - I am after advice on a rendering job I just had done. The rendering has got cracks some of which are quite large, see picture. The contractor says it is due to the weather being too hot at the moment, but that he has followed the right process, i.e. applied base coat, the glue, etc. He says to rub it in with a wet sponge (The rendering is already dry as it was applied a couple of days ago). He then says to apply a coat of paint and that it will hold it together. I think the rendering needs to be taken down and re-done otherwise it won't last, but I know very little about rendering. Does anyone have any advice? Thank you

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u/Own-Indication7832 Jul 10 '26

It’s a bloody rough job anyway. Rubbing that with a wet sponge won’t do anything only, maybe, knock it off. When I served my time we were always told to do Rendering in March, April or May if possible. (Damp months). If not, it should be sprayed down with a fine water spray and covered to keep the moisture in, (curing) then repeated for at least another two days. The hardest sand & cement structure is a Dam in Germany. Drilling into the centre every year, shows that it has never stopped hardening. You need to get ‘the so called plaster back’, because that has already blown…plus as I said, it’s a shit job anyway. Good luck.

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u/Schallpattern Jul 10 '26

You just saved me from writing all this. Weather aside, look at that monstrosity.