Patchy Ceiling Paint

Question

My builder did a few coats of white contract matt emulsion paint on my newly plastered ceiling but it still looks very patchy. He said the ceiling is old and paint is drying quickly.

If I use thicker, ceiling paint, Dulux or another brand - will this remove the patches and ensure a unified finish?

Kieran · Answer

To be straight with you there is multiple factors that will give you a multiple of answers. In short you need to ask your builder did they use neat paint or add water to do these two layers.. hopefully he added water if so then this is called a few names.  mist coat white wash, among others basically water and emulsion mixed together is used as a primer just without the big pricetag of buying primer. So my suggestion is ask builder what he painted walls with hopefully he says watered down paint and if so your patchy ceiling is completely normal. As pointed out in earlier messages if the correct drying time for the plaster hasn't been followed then all sorts of problems will start to surface. Seeing it's been a few weeks now I hope your all fixed and happy and no more issues but should you want help please do reach out

Gary · Answer

If it was New Plaster he should have used a mist coat (paint thinned down with water, so the plaster does not remove all the moisture from the paint) may need rubbing down before applying another coat.

Varkey · Answer

All newly plastered areas should be done by primer coat first.  Then couple of matt emulsion will do the smooth finishing

Lee · Answer

Sand it down if there is large paint marks or brush or roller marks. Then use latex paint 2x coats

Ashley · Answer

New plaster will always soak up paint and look patchy if a primer or white wash hasnt been used. dulux emulsion is also water based so will do the same thing, I would apply a white wash, (mix some of the contract matt with water) and give it a good coat and let it soak it up, then go over with another coat once its dry which should cover all the patches.

Daniel · Answer

The question is didn’t he apply a white wash to the freshly plastered plaster & then your normal top 2 coats , if it was a newly plastered ceiling there shouldn’t be a issue , could be down to cheap paint & not a proper professional job.

Luke · Answer

Ceilings painted white are always difficult to make perfect. Paint quality is a massive help for anyone who is struggling to get the finish they desire, if you're using contract or a cheaper brand you've got to be very good to get that premium finish. Best way is to give it a light sand and use somthing like Johnson perfect matt. It's a more expensive paint but it will improve the finish massively .

Sawyer · Answer

Honestly having over three decades Decorating Experiance , sounds to me like the plaster wasnt dried properly .. Or it could be itbwas not prepared properly.. You cant just throw paint on fresh palster .. It should be properly mis-coated then you should be able to tell what you dealing with.. Sounds to me like that it simply wasnt approached or done properly.. But using better brands such as Dulux is always better !

Perrie · Answer

Hi there,it sounds like the ceiling wasnt mist coated first (a watered down coat 70% paint 30% water)this allows the paint to absorb properly into fresh new plaster,hence the patchy areas. I would sand down the ceiling once the paint is fully dried and dust off with a soft brush.apply the mist coat (make sure its given a really good stir to mix the water a paint properly)and allow 2-4 hours to dry before applying the full 2nd coat.again leave for 2-4 hours to dry.then apply the final 3rd coat.this will solve your problem and give a solid even finish.

Mohsen · Answer

Changing to thicker paint or a different brand will not necessarily solve the problem. Patchiness on new plaster is commonly caused by uneven suction, an inadequate mist coat, surface imperfections or allowing sections of paint to dry before adjoining areas are rolled.

Allow the ceiling to dry fully, inspect it in good light and lightly sand any raised or uneven areas. If the plaster has not been sealed correctly, apply an appropriate primer or diluted mist coat as recommended by the paint manufacturer. Then apply two full coats of good-quality flat matt ceiling paint, working systematically and maintaining a wet edge.

Stains, filler patches or particularly porous areas may require spot priming first. Adding more thick paint without correcting the underlying preparation can leave the ceiling patchy again.

Patchy Ceiling Paint

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