In short: no, fix the cause first. On a damp wall wallpaper comes loose within weeks, the seams open and mould grows behind it. Wallpaper hides moisture; it does not remove it.

Where does the moisture come from?

  • Condensation: on cold exterior walls, in corners and behind cupboards. The fix is insulation, proper heating and ventilation.
  • Leaks: pipes, roof or a crack in the facade. Without repair no wallcovering lasts.
  • Rising damp: in basements and ground floors at the bottom of the wall; a job for a specialist.

Checklist before wallpapering

  1. Remove the cause and let the wall dry completely. Fresh plaster often needs weeks.
  2. Remove mould properly, dry and treat the surface.
  3. Repair plaster damage, sand and prime. More in preparing the wall.
  4. If in doubt, have the moisture measured.

The right material

  • Vinyl surfaces are less vapour-permeable and risky on exterior walls prone to moisture.
  • Non-woven and glass fibre are more vapour-permeable. Paintable glass fibre also bridges fine cracks; for better indoor air there is SYSTEXX for cleaner air.

Frequently asked questions

Can I simply wallpaper over mould?

No. It keeps growing under the wallpaper and can harm your health.

How long does a wall need to dry?

It depends on the cause, plaster and room climate; measuring is safer than guessing.

Does primer help against damp?

No. It improves adhesion but does not stop moisture.

Which wallpaper for a cool exterior wall?

A vapour-permeable non-woven wallpaper or painted glass fibre, plus regular ventilation.

What about bathrooms?

There is a separate article: wallpaper in the bathroom.

Want your wall checked? Send us photos via WhatsApp +49 178 265 93 11.