Exterior house-washing quote questions

Before accepting any exterior house-washing quote, ask the provider to list every surface they intend to wash, describe how they will protect sensitive finishes, explain their wastewater containment plan, and clarify what is excluded. Getting those four things in writing before work begins is the most practical way to compare quotes and avoid disputes about scope.

Listing the exterior surfaces requested

An exterior wash can cover a wide range of materials in a single visit — render, brick, timber cladding, Colorbond steel fascias and gutters, aluminium window frames, glass, insect screens, concrete paths, and fencing. The challenge is that each material has different tolerances, and a quote that simply says “house wash” may treat them all the same.

When you receive a quote, ask for an itemised surface list rather than a single line description. If a surface is not on the list, ask whether it is excluded or simply not noticed. Items to clarify include:

• Garage door panels (often sheltered from rain and therefore accumulated with grime)
• Under-eave sections of guttering and fascias
• Low-set retaining walls adjoining the dwelling
• Flyscreen frames versus the screen mesh itself

Colorbond’s own maintenance guidance notes that “some areas such as wall cladding under eaves, the top of garage doors and the underside of eave gutters are often not washed by rainwater, and so require some attention” — worth checking whether your quote covers those exact spots.

Describing existing finishes and visible concerns

Before a provider can quote accurately, they need to know what they are working on. Powdercoated aluminium frames, annealed glass, Low-E coated glass, coated mirror products, and toughened glass all respond differently to cleaning agents and water pressure.

Viridian’s cleaning guide notes that glass with an exposed Low-E surface “requires extra care and attention when cleaning” and that alkaline or alcohol-based cleaning solutions can leave visible streaks on those surfaces. If your home has Low-E or other coated glass, that is information worth volunteering upfront — and worth asking the provider to acknowledge in writing.

Similarly, if your property has window film applied, tell the provider before work begins. Some cleaning approaches can compromise adhesion or the film surface.

Note any visible concerns when describing the job: heavy lichen on render, mortar residue near brickwork, rust streaking from fixings, or accumulated salt deposits in a coastal setting. These are negotiating points for scope and method, not just cosmetic details.

Questions about the provider’s assessment and protection plan

A provider quoting without visiting the property is working from limited information. Before accepting a remote quote, ask:

• Will they conduct a site inspection before confirming method and price?
• How do they intend to protect glass, frames, and seals during the wash?
• What happens if chemical overspray or high-pressure water contacts a surface it was not intended for?
• Do they carry public liability insurance?

Stegbar’s care and maintenance document is explicit that aluminium window and door frames should never have “powerful streams of water directed directly at the window(s) or door(s)” and that the sprinkle setting on a hose nozzle should be used to avoid water leaking into the home. While that guidance is specific to Stegbar products, it illustrates why protection plans matter: the method appropriate for a render wall is not the same as the method appropriate for a window frame or screen.

For sensitive glass types — coated, toughened, or laminated — Viridian’s cleaning guide recommends seeking advice from professional window cleaners or reputable glazing companies, which is a useful framing question to put to any provider.

Separating included work from excluded areas

Different assumptions about the surfaces included can create scope misunderstandings. A useful pre-quote exercise is to walk the perimeter of your property and note every surface, then map each one to either “included,” “excluded,” or “ask.”

Hypothetical scenario (illustrative only, not a customer account): Imagine a homeowner asks for a quote on the front and side elevations, assuming the rear pergola posts and low brick garden wall are included. The provider quotes for the main dwelling faces only. After the visit, neither surface has been cleaned. The example leaves unanswered questions about how the rear pergola posts and garden wall were recorded in the agreed scope. A surface-by-surface list can help clarify those assumptions before work begins; it does not determine either party’s rights or responsibilities.

Ask specifically whether the quote covers:

• Garden walls and fencing adjoining the house
• Driveway and path concrete adjacent to the dwelling
• Solar panels (a distinct service with its own access and product considerations)
• Window glass versus frame versus flyscreen — and whether screens are removed and replaced

Recording the method proposal without pressure-setting advice

You do not need to know what pressure settings are appropriate — that is the provider’s professional call. What you do need in writing is a description of the type of method proposed for each surface category, so you can ask informed questions.

Useful questions to put to the provider:

• Is this a soft-wash (low pressure, chemical-assisted) or high-pressure approach on each surface type?
• What cleaning agent do you propose for render versus glass versus metal?
• For coated glass or window film, have you confirmed compatibility with your cleaning agent?

Record the answers. If a problem arises after the visit, a written method description is evidence of what was agreed.

Wastewater and stormwater considerations

Wash water from an exterior house clean can carry detergents, soil, organic matter, and other material. Under South Australia’s Environment Protection (Water Quality) Policy 2015, it is an offence to discharge listed pollutants — including liquid waste — into stormwater systems. The SA Eastern Health Authority notes that offences can attract a fine and repeat offenders may be prosecuted.

This is a reasonable question to ask any provider: how do they manage wastewater run-off during a house wash? Ask what containment, diversion or other wastewater arrangements are proposed for this site and which requirements apply. A proposed plan alone does not establish the provider’s qualifications or compliance. If you are uncertain about how compliance obligations are allocated between you and the provider, that is a question worth raising with them before work begins.

Working-at-heights considerations in your quote

Any work above single-storey height introduces access complexity. Work at height introduces access complexity, and different tasks may attract different WHS obligations depending on the nature of the work and workplace. Ask your provider which WHS duties and documents — if any — apply to the elevated portions of your job, and how they have identified and controlled the relevant hazards. Ask how they intend to access second-storey eaves, upper render sections, or roof-level guttering — and whether that access method and any associated controls are reflected in the quoted price.

A pre-quote surface checklist (hypothetical, for discussion purposes)

Before your enquiry call or site inspection, consider noting the following for each elevation of your home:

Surface	Material	Visible concern?	In scope?
Main walls	Render / brick / cladding	Lichen, staining	Confirm
Fascias and gutters	Colorbond / painted	Salt, grime	Confirm
Window frames	Aluminium / timber	Powdercoat condition	Confirm
Glass	Coated / uncoated / film	Hard water marks	Confirm
Flyscreens	Mesh / frame	Dirt load	Confirm
Paths and driveway	Concrete / paving	Oil, moss	In / out?
Fencing and garden walls	Colorbond / brick	Adjacent to dwelling	In / out?

Bringing this list to the quote conversation gives the provider clear information and gives you a written record of what was discussed.

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Further reading

• Window cleaning quote inclusions checklist
• Flyscreen and track cleaning scope
• Post-construction window cleaning enquiry
• Apartment window cleaning responsibilities

Sources

• SA Eastern Health Authority — Stormwater Pollution: https://www.eha.sa.gov.au/public-health/storm-water-pollution
• Colorbond Steel — Easy to Maintain: https://colorbond.com/why-colorbond-steel/maintenance
• Viridian Glass — Glass Cleaning Guide (PDF): https://www.viridianglass.com/wp-content/uploads/2024/03/Viridian-Glass-Cleaning-Guide.pdf
• Stegbar — Taking care of your windows & doors (PDF): https://cdn.shopify.com/s/files/1/0768/1284/5287/files/cm-windows—doors-stegbar.pdf
• SafeWork SA — Safe Work Method Statements: https://www.safework.sa.gov.au/industry/construction/safe-work-method-statements