Paint cracks when drying

[lx200gps]

I’m in the process of painting the walls in a room which has previously been painted with an emulsion sheen finish. After applying two coats with a roller I have noticed the new paint has tiny cracks all over it. Looks a bit like a lake that has dried out during a drought. Is this because I should have applied a primer or stabilizer of some sort before painting? And, if so, can I apply this now and simply paint again?
Mr Pickles

 

[confidentincompetent]

Sounds a classic case of matt emulsion on silk. Silk surfaces should be well sanded before applying matt emulsion. If this is the case anymore coats of waterbased paint ontop of this will make the mudcracking appear worse. The way out is to paint all with a thinned (white spirit) coat of solvent based undercoat. Then finish with two oats of your matt emulsion.

 

[lx200gps]

Thanks. I'll try that.
Mr Pickles

 

[worker1974]

i had this once in a house i bought i weak bonded the walls first problem solved

 

[Mor7s]

I have had this very problem this weekend and annoyingly cracking is in pacthes not everywhere. Would a coat of sheen paint cover the cracks or is the solvent undercoat and try again route the only option?

Any recommendation on a solvent based undercoat? Would own brand cheepies be OK or do you get what you pay for?

Can you apply the thinned undercoat with a roller or is a brush the only way to go??

Apologies for all the questions, after 2 days going over and over the emulsion I would like to fix it in quick time but don't want to further compund the problem(s).

Thanks in advance