Hire a tradesperson!

Our tradespeople are ready to help. Post a job for free, read reviews and hire today.

Need some tips or advise?

Painting & Decorating

Plaster / mist coat problems

Anonymous user 15 March 2024 - 2.37 PM

Hello all, I recently had a lot of plastering done in my flat. I applied two mist coats, with watered down Leyland contract matt white emulsion. I've done this before and know the mixture i used was fine. I've then painted twice with the same paint but the finish isn't smooth. I recently found a post on a forum showing patches where the mist coat hadn't taken, and it looks exactly like the problem I'm having. I can see areas where the paint has taken and others where it has not. Being on the ceilings it is shown up by the light flooding in the windows and looks terrible. Any suggestions on a solution for this? Undercoat the whole ceiling, lining paper etc? The strange thing is the problem only exists on the plastered ceilings, no such issues on the walls. I've finished one room where the walls are as smooth as expected to be. Any tips and solutions would be much appreciated.

Are you a tradesperson and able to answer this question?

4 Answers

Anonymous user

The problem is most plasters can do walls well but ceilings is a much harder task ,I would you sand back ceiling until smooth fill slightly in areas needed a d reapply 2 full coats of emulsion.
Answered2 March 2018
1

Squires & Son Decorators
Rating: 5 out of 5551 review
Bristol
Hi, As previous surface area has been over polished by plasterer and requires a good key (abrade) then apply the mist coat.
Answered2 March 2018
1

Timothy David Interiors
Rating: 5 out of 55531 reviews
Tonypandy
Hi. Sounds to me that these areas have plaster 'fat'. If the plaster is overworked on the final trowellings and susequently too much water is used, the residue from this is left on the plaster. You can abrade it to remove sone of it and provide a key. Then lightly surface/fill with a good filler such as toupret or easifill. These fillers abrade easily when set, and as you have done the correct thing in using a contract matt the paint around the repair should lightly abrade too. Shame you have to do this. We would all ( us decos and the diy'rs) like to get on with coating up new plaster and not get bogged down in prep. All down to how good the plasterer is im afraid
Answered2 March 2018
0

1st Choice building services ltd
Rating: 5 out of 55514 reviews
Hereford
Some plasters glass finish their plaster, this requires a light sanding to form a key to the new paint. This has caught many decorators out. Failing that the above answer would be my only other answer for you.
Answered2 March 2018
0