dot and dab come away ?

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PVa... no one really knows why about

Why go over when tacky?... because we always have done was the answer I always got when I asked the question...

Never PVA'd before dabbing because I never have :D


Well-Known Member
I was always taught that a good coat of pva will re-emulsify ie. wet up again when applying dabs on thereby breaking the bond.
Personally if its dusty ill just give a very light weak dusting over with pva just to stabilise the surface. Never had any comebacks yet.


Private Member
Not sure personally if it's down to the pva but I would probably suggest it hasn't had the right amount of dabs on wall or not enough has been put on for it to adhere properly to the board