Find and resolve the source of water before cosmetic work.
All decorating problems
Moisture & stains · H&C advice
Water stains & tide marks
Yellow or brown marks can show through a new coat of paint.
- Discoloured ceiling patches or ring-shaped marks.
- A stain reappearing through an ordinary emulsion.
Understand before treating
What might cause it?
Similar-looking defects can have different causes. Assessment comes before product choice.
Previous or current leaks can leave staining. Condensation and other moisture problems may look similar; colour alone does not identify the source.
Preparation & next steps
How we approach it
Check that the surface is dry, sound and free from loose material.
Choose a stain-blocking system appropriate to the substrate and stain, then finish according to its technical instructions.
A growing stain, wet ceiling or sagging surface needs prompt assessment. Do not paint over an active leak. 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.