How to stop patchy paint when using a roller?

Some areas look fine but others dry lighter or streaky, and it’s really obvious once the light hits the wall, but I don’t get what I'm doing wrong?

Asked by Tushar on 30th Mar 2026
Expert Trade Answers
"You have to put a nice evenly coat on with a long pile roller all over with a good quality paint."
Answered on 30th Mar 2026 - Member since Jan 2026 - report
"Hi. Patchy paint is bad prep of the given surface. It must be dust, damp and oil free. This will ensure no patchy paint. Plus use a quality undercoat before you apply a Top coat"
Answered on 30th Mar 2026 - Member since Oct 2025 - report
"Hi Tushar. Your doing nothing wrong as long as the paint is mixed correctly and your putting the paint on evenly. It sounds like the problem is the wall your painting. Was the wall wallpapered before or bare plaster on it in places. If so it will need sanded and prepared better and paint over it again. Or it could be the paint you’re using is a retail paint that just needs extra coats. Hope this helps.

Trevor"
Answered on 30th Mar 2026 - Member since Oct 2025 - report
"It may be the surface itself, especially if you paint over brick(plaster)and drywall. Could be unewen or lack of base binder. Also consider moisture. Some walls can get damp uneven."
Answered on 30th Mar 2026 - Member since Jun 2025 - report
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