Uneven or Bumpy Wall Surface — Causes, Fixes & Cost in KL
Walls have visible bumps, dips, plaster ridges, or old paint texture that shows through the new topcoat.
Estimated professional fix: RM 5–RM 12 per sq ft (skim-coat)
Uneven walls are a finishing problem that paint cannot fix. Bumps, dips, and ridges come from old textured paint, years of patch repairs, or plaster that was never floated flat — and they become obvious the moment a clean new colour is applied, because flat paint shows every shadow. A full skim coat is the standard fix: a thin layer of plaster over the whole wall, sanded flat before painting.
Common causes
Professional solutions
Safe DIY checks first
- 1Shine a torch along the wall at a low angle — sidelight reveals every bump and dip
- 2Run a straightedge (or a long level) across the wall to find hollows deeper than about 3 mm
- 3Check if the unevenness is texture (old paint) or movement (cracks, swelling)
- 4Press on suspect patches — loose or hollow repair areas must be removed before skimming
When to call a pro
What affects the cost
Skim coating is quoted per square foot — roughly RM5–RM12 depending on wall condition, access, and whether a second coat is needed. A typical master bedroom runs RM400–RM1,200. Spot repairs are cheaper but leave visible patches; full-wall skim gives the flat premium finish.
How to prevent it
Related service
This problem usually connects to Wall & Ceiling Skim Coat. Review service scope, pricing, warranty, and process before booking.
View Wall & Ceiling Skim CoatFAQs
Is skim coat different from filler?
Yes. Filler is for spot repairs. Skim coat is a full-wall thin plaster layer that gives a perfectly smooth premium finish.
How thick is a skim coat?
Standard skim coat is 2 to 3 mm thick. Very uneven walls may need multiple layers.
Can I skip skim coat if I'm repainting anyway?
You can, but paint alone doesn't hide bumps. Premium finishes always start with a proper skim.