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  1. J

    Hardwall onto Thermalite Newbie Advice PLEASE!

    Newbie Question (go gentle…) Had my second go at hardwall plastering a section of thermalite wall in my bathroom. I applied 1 coat of GyPrime the night before, without watering it down (first mistake?). Next day I dabbed on 4 pieces of 9mm plasterboard and set some screed blocks on the...