Powdery residue after leak.

Miktractor

New Member
After having guttering problems moisture came down the inside of a bedroom wall making the wallpaper peel off. The leaks now fixed and the wall has dried out but its left a powdery, flaky residue on the wall. I want to repaint the wall but dont know the best way to prepare the wall. Any advice greatly appreciated. Thanks.
 
hi, good chance its efflorescence the same you sometimes see on brick work or block work, use a stiff brush to remove the residue and coat with water based stabilising solution, that should sort it
 
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