Recently we were asked whether it would be OK to paint over mould on the shower ceiling. Painting over existing mould is probably not a good idea because the mould may continue growing beneath the paint film and subsequently the paint would start peeling off. The best solution would be to clean the mould following current mould remediation guidelines such as CCA 82 – Mould Guidelines for the Canadian Construction Industry and then find a way of reducing condensation in the shower. Painting after the mould has been cleaned and the condensation problems fixed would be OK.
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