House Washing
Soft washing for rendered, painted, brick and weatherboard homes, built to remove mould, algae and grime without blasting delicate surfaces.
House washing is the regular cleaning of exterior walls, eaves, fascias and entry points to remove mould, algae, lichen, dust and cobwebs. WSI Cleaning soft-washes residential exteriors across Brisbane and the Sunshine Coast, where the subtropical climate accelerates mould growth on render, paint and weatherboard. Most homes need a full house wash every 12–18 months; shaded southern walls and homes within a kilometre of the coast typically need it more often. We quote in writing within 24 business hours and most residential jobs are scheduled inside the same week.
Right match for your property.
For homeowners who want the exterior refreshed before sale, inspection, repainting or seasonal maintenance.
Built on 12 years of surface care.
Gentle method, visible curb appeal, safer for painted and rendered surfaces.
What is soft washing?
Soft washing is a low-pressure exterior cleaning method that uses a biodegradable detergent — typically a sodium hypochlorite solution blended with a surfactant — to kill mould, algae and lichen at the spore level. Pressure stays under 500 PSI, compared with 1,500–3,000 PSI for residential pressure washing. Soft washing is the correct method for any surface where high pressure would force water behind the substrate or strip the finish: render, painted weatherboard, brick, fibre cement and roof tiles. The chemistry does the cleaning, not the pressure.
How we approach a house washing job.
- 01
Surface assessment
We walk the property, identify the substrate (render, brick, weatherboard, fibre cement) and flag any vulnerable points: timber, soft mortar, garden beds, painted shutters.
- 02
Pre-treatment
Plants are pre-watered and tarped where needed. Windows, doors and outdoor electrics are checked and protected.
- 03
Soft-wash application
Detergent is applied bottom-up via low-pressure pump to prevent streaking, then dwelled for 5–10 minutes so the chemistry kills mould and algae at the root.
- 04
Rinse
Surfaces are rinsed with controlled-pressure water, top-down, until run-off is clear.
- 05
Finishing
Eaves, downpipes, sills and entry points are detailed by hand. Garden beds are flushed to neutralise any over-spray.
What this service covers.
Acrylic render
Soft wash only. High pressure can blow render off the substrate.
Painted weatherboard
Soft wash. Pressure strips paint and forces water behind the boards.
Face brick
Soft wash for general dirt; targeted pressure for efflorescence.
Fibre cement & James Hardie
Soft wash. Pressure can damage the surface coating.
House Washing questions, answered.
How often should I wash my house in Brisbane?
Most Brisbane homes need a full exterior wash every 12–18 months. Shaded south-facing walls, properties under heavy tree cover and homes within a kilometre of the coast typically need it every 9–12 months because of faster mould and salt build-up.
Will soft washing kill my plants?
No. We pre-water and tarp garden beds, dilute the application correctly for the substrate and flush the soil after we finish. The detergent we use breaks down on contact and is rated safe for residential landscaping when applied at the correct dilution.
Can I pressure wash my render?
No. Acrylic render and most painted exteriors should never be pressure washed — high pressure cracks render, blows it off the substrate or strips paint. Soft washing is the correct method for any rendered, painted or coated wall.
How long does a house wash take?
A standard single-storey home is usually 3–5 hours on site. Two-storey and architecturally complex homes take 5–8 hours. We confirm the time estimate with the written quote.
Do you guarantee the result?
Yes. If you're not happy with the finish, tell us within 24 hours and we'll come back and fix it at no extra cost.
House Washing in your city.
A fixed price, no hidden fees.
Quick and simple. No pushy follow-ups, no hidden fees, no phone call unless you ask for one.