Assess each elevation separately
North- and west-facing boards often receive stronger UV and heat, while shaded elevations can retain moisture for longer. Check lower boards, end grain, joints, window sills and areas near gardens or leaking gutters.
Character homes in Yarraville and Kingsville may have multiple generations of coating and repairs. Williamstown properties can also collect salt and grime that must be washed away before adhesion is assessed.
Weatherboard preparation sequence
Wash the exterior
Remove dirt, chalking, cobwebs, salt and biological growth using a method appropriate to the surface.
Let the timber dry
Do not trap moisture beneath primer or paint. Drying depends on weather, exposure and timber condition.
Scrape failed coating
Remove loose and flaking paint to a firmly bonded edge without gouging the board.
Sand and feather edges
Smooth transitions, reduce gloss and prepare sound coating to accept the next layer.
Repair suitable defects
Address stable holes and open joints with exterior-grade materials while allowing for normal timber movement and drainage.
Spot-prime bare timber
Prime exposed timber, vulnerable end grain and prepared repairs with a compatible exterior system before topcoats.
Warning signs requiring closer assessment
- Grey, fibrous timber is exposed beneath failed paint.
- Boards feel soft, split deeply or remain damp after suitable drying weather.
- Paint failure is concentrated near joints, sills, gutters or ground level.
- Old coating produces suspect dust or chips and has not been tested for lead.
Lead-safe preparation on older coatings
Previously painted timber on older homes may contain lead-based layers. Testing guides the preparation method; it is not appropriate to assume every old coating contains lead or that none does.
Where lead is identified or suspected, preparation should minimise dust and contamination through suitable wet methods, extraction, containment, PPE and thorough clean-up. This guidance does not represent a lead-abatement service.