House Washing

Dust, traffic film, pollen, organic growth, insect residue and rain-carried dirt gradually settle on exterior surfaces. Shaded or damp areas may require dirt and mould removal; eaves, fascia and corners commonly collect cobwebs.

Our external house cleaning services can remove or substantially reduce:

• Dirt, dust and atmospheric grime;
• Mould, algae and other organic growth;
• Cobwebs and insect residue;
• Bird droppings and organic debris;
• Loose surface deposits and some environmental staining.

Just as important is distinguishing removable contamination from deterioration. Faded paint, corrosion, damaged coatings, cracks, efflorescence and staining that have penetrated or chemically altered a surface may require a different response. Stronger cleaning can increase the risk of damage without improving the result.

Melbourne homes face different combinations of rain, wind, dust, shade, vegetation and airborne contamination. Even separate elevations of the same house can weather differently.

Rather than applying a universal cleaning schedule, we consider the material and its exposure. James Hardie recommends washing fibre-cement exterior surfaces every 6–12 months, depending on location and exposure. Dulux recommends washing Weathershield-coated surfaces annually in sheltered or inland locations and every six months in coastal or industrial environments.

Sheltered pre-painted coated-steel surfaces can require more attention than areas regularly washed by rain. Manufacturer maintenance guidance recommends washing naturally unwashed areas at least every six months, increasing to approximately every three months where salt spray, airborne dirt or industrial fallout is significant.

These are material-specific maintenance benchmarks rather than a timetable for every house.

The main challenge is not generating enough pressure, but knowing what a surface can tolerate.

Excessive pressure can remove paint, mark vulnerable substrates or force water into gaps. Equipment suitable for sound masonry may therefore be inappropriate for painted timber, ageing coatings or vulnerable render requiring professional render cleaning.

Homes with mixed exterior finishes, deteriorating paint, restricted access, or upper-storey walls require particular care. In Victoria, fall risks above 2 metres are subject to specific fall-prevention requirements, while risks at lower heights must also be controlled.

We work with different exterior materials rather than treating the façade as a single, uniform surface.

Material alone does not determine our method. Sound brickwork and deteriorated painted brick, for example, may require very different treatments.

Older fibre-cement materials call for additional caution. Where cladding may contain asbestos, we do not treat it as modern fibre cement. WorkSafe Victoria states that high-pressure water cleaning must not be used on asbestos-containing material.

Before cleaning, we assess the surfaces, coatings, existing deterioration, contamination, height, access, openings and potential water-entry points. Where compatibility is uncertain, a small test area can show how the surface or finish responds before broader cleaning begins.

Our process can involve:

1. Assessing the walls and vulnerable areas;
2. Selecting an appropriate cleaning method;
3. Testing where the surface or coating requires additional assessment;
4. Working carefully around sensitive surrounding areas;
5. Applying suitable cleaning solutions where required;
6. Working from higher areas down to control runoff and reduce streaking;
7. Rinsing at suitable pressure and checking for remaining contamination and pre-existing defects.

Loose or flaking paint needs particular care because cleaning cannot restore failed adhesion.

Runoff is also considered when planning the job to ensure that cleaning agents and loosened contaminants do not enter stormwater drains as polluted wash water.

Soft washing is our preferred approach for many exterior finishes. It combines low pressure with an appropriate cleaning treatment to loosen contamination before rinsing.

Sound, harder surfaces may suit controlled pressure cleaning where additional mechanical action is useful. Nozzle selection, working distance, pressure and substrate condition all influence the risk of damage. Delicate details may instead require manual cleaning.

That is why we do not apply a universal PSI figure to house washing. Painted weatherboards, render, brick, fibre cement, timber and coated steel have different tolerances, while surface condition can be just as important as the material itself.

There is no single cleaning timetable we recommend for every Melbourne house. Material, exposure and contamination provide better guidance.

For fibre cement, manufacturer guidance recommends washing every 6–12 months, depending on location and exposure. For some exterior paint systems, maintenance guidance recommends washing every 12 months in sheltered or inland environments and every six months in coastal or industrial environments.

Naturally, unwashed pre-painted coated-steel areas may need more frequent attention. Manufacturer maintenance guidance recommends washing at least every six months, moving towards approximately every three months where salt spray, airborne dirt or industrial fallout is significant.

Site conditions matter as well. Shaded walls, nearby vegetation and areas where organic growth returns quickly may need attention sooner. The maintenance requirements of the installed material or coating should take priority over a generic schedule.

Our house washing service removes responsive surface contamination; it cannot reverse UV fading, repair cracked render, replace failed sealant, restore peeling paint or guarantee removal of permanent staining.

Mould and other organic growth can be removed or treated, but persistent moisture, shade, leaks or drainage problems may allow them to return. In those cases, washing addresses the contamination rather than its underlying source of moisture.

Customer satisfaction is a priority for us, alongside matching the service to the property’s requirements.

Setting realistic expectations is part of that approach. If we identify coating failure, permanent staining or physical damage rather than removable contamination, we do not treat stronger cleaning as an automatic solution.

Our approach is surface-specific rather than based on one fixed cleaning method. Depending on the material, exterior paint type and condition, surface age, and contamination, we can select from soft washing, pressure cleaning, and hand cleaning.

That distinction matters when a single home incorporates several building surfaces that require different treatments. We choose the technique based on what we are cleaning, rather than treating high water pressure as the default solution.

A useful house-washing quote depends on more than just floor area. We consider the property’s size and number of levels, exterior materials, contamination, access and surface condition when assessing the work required.

Contact Window Cleaning Melbourne Crew with details of your property and the areas you want cleaned. Identifying surfaces and problem areas beforehand helps us recommend an appropriate cleaning approach and clearly define the scope.