Allow the coating its specified drying time before judging the result.
All decorating problems
Paint failure · H&C advice
Patchy paint & flashing
Different sheen or colour patches remain visible after painting.
- Filled areas standing out from the surrounding wall.
- Roller overlaps, shiny patches or uneven colour in side lighting.
Understand before treating
What might cause it?
Similar-looking defects can have different causes. Assessment comes before product choice.
Uneven absorption, unsealed repairs, application differences or unsuitable drying conditions can cause variations in appearance.
Preparation & next steps
How we approach it
Assess absorption and the preparation of repairs, and seal where required.
Use consistent application and the specified coverage and recoat times; finish a complete area where appropriate.
Adding more paint without checking the cause may not help. Confirm product compatibility and avoid overworking paint as it dries. Check current product technical data, safety instructions and compatibility; this guide is not a site diagnosis or a guaranteed repair specification.
The right system for the surface
Product selection matters
A suitable primer or sealer may be part of the preparation, but it cannot replace fixing the cause. Zinsser is one of the brands we use; the exact product depends on the surface, defect and intended finish.
Zinsser UK product guidanceOriginal H&C guidance. We are not approved, accredited or endorsed by Zinsser.
Local decorating help
Let’s look at the problem properly.
Share your postcode, the affected surface and what you’ve noticed. Preparation and repairs are assessed before a quote is agreed.