Can I paint over wallpaper?

This is a genuine shortcut rather than a bodge, provided the paper passes a few checks. It becomes a mistake when the paper was going to fail anyway, because paint makes stripping it much harder later.

Safety

Step by step

1. Test whether the paper is stuck.Press across the whole wall with a palm and listen for hollow areas. Pick at a seam in a corner. Anything lifting, bubbling or sounding hollow means strip rather than paint.
2. Identify what kind of paper it is.Ordinary paper and lining paper take paint well. Vinyl and washable papers have a plastic surface that paint will not key to. Woodchip and heavy textures will still be visible, and heavily embossed papers usually look worse painted.
3. Do the water test on a hidden patch.Dab water on. If it soaks in, it is a paper you can paint. If it beads, it is vinyl or washable and needs stripping or a specialist primer.
4. Think about what happens later.Painted wallpaper is considerably harder to strip than bare wallpaper, because the paint seals it against stripping solution. That is the real cost of this decision.
5. Strip it instead if there are many layers.Several layers of paper move independently and will crack or lift under paint. More than two layers is a strip job.
6. Repair the seams and damage first.Glue down lifting edges with seam adhesive and let them dry. Fill tears and gouges with a light filler and feather the edges. Paint highlights every defect rather than hiding it.
7. Clean the surface.Sugar soap or a mild detergent, then let it dry fully. Grease, nicotine and dust all prevent adhesion, and a kitchen wall usually has all three.
8. Seal with an oil-based or stain-blocking primer.This is the step that decides whether it works. Water-based paint wets the old paste, which softens and releases, so the seams lift. A solvent-based primer seals without wetting it.
9. Block any stains before the topcoat.Water marks, nicotine, ink and dyes in the paper itself all bleed through emulsion. A dedicated stain blocker, and check after it dries rather than after two coats of colour.
10. Roll rather than brush across the seams.A roller applies less mechanical force to the paper. Working a brush along a seam is how edges get lifted during painting.
11. Do not over-wet it.Thin coats. Loading a lot of wet paint onto paper is what causes bubbling, and once a bubble forms it does not go back down.
12. Let each coat dry fully.Longer than you would on plaster. Trapped moisture under paint on paper causes both bubbling and later peeling.
13. Expect the texture to show.Paint does not fill a pattern. Embossed and woodchip papers look painted-over, which some people are fine with and some are not — decide before starting rather than after the first coat.

Tips

• The water test decides it in ten seconds: soaks in, you can paint it; beads, you cannot.
• Oil-based or shellac primer first, always. Skipping it is the single reason painted wallpaper fails at the seams.
• Glue lifting seams down before painting. They will not stick afterwards, and paint will not hold them.

Common mistakes

• Going straight on with emulsion — Water-based paint softens the old paste, the seams lift and bubbles form. A solvent-based primer seals the paper without wetting the adhesive.
• Painting over paper that is already lifting — Paint does not stick it back down, and it makes stripping much harder later. Any lifting edge means glue it or strip the wall.

If it doesn't work

Questions people ask