Why is my bathroom ceiling and cornice paint cracking?

We have painted our bathroom ceiling and the cornices in our spare room with matt emulsion (water based) paint and within a day the pain began to crack badly.





The cornice is mostly cracking where the old pain had cracked off and left the cornice exposed.





The bathroom ceiling is newly re-plastered and we painted with a 50/50 paint/water mix first then two coats.





Yet, we also painted the bathroom and bedroom *walls* with this paint, both newly re-plastered, and they DIDNT crack.





What should we do?Why is my bathroom ceiling and cornice paint cracking?
This happens when the plaster hasn't dried properly. Drying times vary greatly depending on the background surface and its suction properties. You basically have a layer of moisture between plaster and paint causing it to peel. It sounds like it needs longer for the plaster to dry. 6 weeks is not uncommon a drying time in bathrooms !!Why is my bathroom ceiling and cornice paint cracking?
We had it professionally checked out and the consensus is faulty paint. Because it was in two different rooms, it had to be paint that has been exposed to frost.

Report Abuse

Try using a flexible emulsion .Its good for covering cracks because it expands and contracts depending on temperature .Its good in bathrooms where you will have a lot of steam and moisture.
I would have put a kiltz first it seals anything and opens you to new acceptance but may need a couple of coats. Baths and kits have gloss


uses and need to be covered if changing to a satin or ?
As above but I would only apply thin coats at first and wait quite a while before adding more paint.