Treating the Underlying Problem
Mould needs an appropriate anti-fungal treatment before painting, nicotine and water staining need a stain-blocking primer, and general grime simply needs a thorough clean - each treated differently rather than painted straight over. Painting over any of these without treatment is a false economy.
Priming Sets Up the Final Finish
A correctly primed wall gives the topcoat something consistent to adhere to, which is especially important after sanding or filler repair where the surface is a patchwork of old and new material. Skipping priming on patched areas is a common cause of uneven sheen once painted.
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Get a Quote for Wall Sanitisation & PrimingWall Sanitisation and Priming FAQs
Can you paint over mould without treating it first?
No - painting over untreated mould almost always allows it to grow back through the new paint within a short time.
What causes yellow or brown staining on walls?
Usually nicotine, water damage or an old distemper-based paint bleeding through - a stain-blocking primer resolves this.
Is priming always necessary, or only on new plaster?
Priming is recommended on new plaster, patched repairs, stained areas and any surface changing colour dramatically, not just brand-new walls.
