No worries mate. Ended up taking all the plaster off, didn't trust it, then used adhesive and mechanical fixings to stick waterproof boards over the scratch coat. Messy but seems to have done the job 👍🏻
No worries mate. Ended up taking all the plaster off, didn't trust it, then used adhesive and mechanical fixings to stick waterproof boards over the scratch coat. Messy but seems to have done the job 👍🏻