Ceilings cop a particular kind of scrutiny: daylight rakes across them from windows and shows every lump, patch and roller mark. They also collect the stains nothing else does - roof leaks, bathroom steam, smoke. Here's how ceiling painting actually works.
Why ceilings are painted flat
Flat (matt) ceiling paint reflects almost no light, which hides minor surface imperfections that any sheen would highlight. Standard ceiling white is also slightly different from wall white - formulated to resist yellowing and spatter less during rolling. This is one place where the specialist product genuinely earns its keep.
Water stains: block first, always
A dried water stain will bleed through ordinary ceiling paint no matter how many coats you apply. The fix sequence:
- Confirm the leak is fixed. Paint can't stop moisture that hasn't stopped.
- Let the plaster dry fully. Damp plaster plus paint equals bubbling.
- Stain-blocking primer over the mark. This seals the stain so it can't migrate into the topcoat.
- Then the ceiling paint.
Smoke and kitchen film
Smoke damage and years of kitchen grease film behave the same way - they bleed through. Cleaning first, then a blocking primer where needed, then topcoats.
When a ceiling needs repair, not paint
Sagging plasterboard, wide cracks that keep returning, and plaster that's drummy to the touch are repair jobs. Paint over them and you've bought a short delay. A straight answer about which situation you're in is part of any honest quote.
Colour beyond white
White isn't compulsory. Dropping a soft colour onto the ceiling can settle a tall room, and colour drenching - walls and ceiling in one tone - suits smaller rooms. But white flat remains the default for good reason: it bounces light and hides age.
Cornices, roses and ceiling details
Ornate cornices and ceiling roses are painted with the ceiling or picked out in the wall colour, depending on the look. Either way they get the same preparation: cracks at the cornice line are raked out and filled, not just painted over, because those shadow lines show every shortcut.
Working over your life
Ceiling work happens over everything you own, so protection is the job before the job: furniture moved or covered, floors sheeted, light fittings dropped or masked. Roller spatter travels further than people expect, and flat ceiling paint on a leather couch is a bad day for everyone. A crew that sheets the room first is telling you how the rest of the job will go.
One coat or two?
Over a sound, same-colour ceiling in good condition, one careful coat can refresh. Over stains, patches, or a colour change, plan on two - plus the blocking primer. Quotes that promise one coat over everything are quoting the fast version, not the lasting version.
When to call it in
A single small stain on dry plaster is a contained job. Stains that keep growing, cracks that widen, or any sagging at all are not paint decisions - they're building questions. We look at both kinds every week, and the honest answer about which one you've got costs nothing.
Painting over dark colours and patches
Blocking isn't only for stains. Dark feature walls being repainted light, and patched plaster that flashes through topcoats, need the same discipline: seal the problem first, then finish. A ceiling or wall that's been patched in a dozen places will show every patch under two ordinary coats - a sealing undercoat makes the surface uniform before the colour goes on.
Mould on bathroom ceilings
Bathroom ceilings grow mould where steam meets cold plaster, and painting straight over it feeds the problem: the mould grows through the new film within months. The fix is a mould-killing wash first, full drying, then a moisture-tolerant ceiling product. If mould returns within a season, the honest answer is ventilation - an exhaust fan upgrade beats any paint. We say so rather than sell a repaint that fights a losing battle.
The ceiling after the walls
Rooms are usually quoted as walls plus ceiling, but owners sometimes paint walls alone to save money. It works - until the fresh walls make the ceiling look yellow by comparison. If the budget is tight, the honest order is ceiling first, walls later. Doing walls first and the ceiling next year means protecting fresh walls from ceiling spatter twice over.
Call 0420 596 677 to talk through your ceilings - stained, cracked or just tired.