i painted ma room the other day and after it dryed the paint was..?

[william c]

cracked from ceiling to floor small cracks all joined on all four walls. all walls then got a second coat and they all dryed the same all crackd why is this and can it be fixed. please help
i used matt paint to paint over silk is that the prob. if i painted bk over the matt with silk would it make any diffrence.

[t11omo]

You've painted emulsion (water based paint) over a gloss or semi gloss paint. It's daft to say 'no one paints walls with gloss' because people do even though you're not supposed to. Try a small patch of primer and then another coat of emulsion. If this doesn't work you may need to key the walls with very fine sand paper, then prime them with a good coverage of smooth over. Polycell do a good range. The sand paper will need to be very, very fine but this won't work if you're painting over a lining paper and not on to plaster. As a last resort you may need to strip the paper off if this is the case. But what lies beneath?!? I hate decorating. x

[pescador]

no one paints walls in Alkyd(oil) so first answer is incorrect
primer a small area and try to recoat