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A roof-specific hiring checklist

These checks help you ask better questions. They do not certify a provider or replace advice about your individual property.

Business & coverageConfirm the legal business name, exact address served and experience with your roof material. Check applicable registration through Washington L&I. Insurance & crewRequest current liability coverage suitable for the work and ask who will be on the roof. Check workers’ compensation status when employees or other workers will do the job. Method & outcomeIdentify the roof product and cleaning method. Separate physical moss removal from treatment, and agree on expected appearance and any follow-up. Runoff & cleanupGet a plan for plants, drains, downspouts, neighboring property, removed debris and final cleanup. Price & termsCompare totals including applicable tax, access and travel charges. Confirm deposits, cancellation, weather delays, exclusions and change approval in writing.

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Credentials are separate checks.

A business license is not the same as contractor registration. L&I’s licensing guide includes pressure washing roofs and other structures as contractor work. If a provider says the exact cleaning scope is exempt, ask L&I to clarify rather than accepting a blanket “cleaning only” claim. L&I licensing guide (PDF)

Registration, a bond and an insurance certificate do not guarantee workmanship or coverage for every type of damage. An owner working alone may not have a workers’ compensation account. Verify the actual arrangement. L&I hiring steps

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Hi, I’m looking for roof cleaning at [city / neighborhood]. My roof is [material, approximate age if known], and the main issue is [debris / moss / staining]. I can share photos taken safely from the ground. Please confirm that you serve this address and quote the total including tax, access or travel charges, and any follow-up. Please specify the cleaning method and products, physical moss removal versus treatment, gutter/downspout work, plant and runoff protection, cleanup, exclusions, and expected appearance after the visit. Please send your legal business name, applicable contractor registration, current liability insurance information, crew coverage, availability, and deposit/cancellation terms.

Before the work starts

Document existing condition from a safe place. Confirm access, parking and water arrangements. For shared roofs, check the association’s responsibilities and any approval requirements. Agree who will handle concerns, how changes are authorized and how you will review completion.

Be cautious about full advance payment or a demand to decide immediately. Put changes in writing and do not pay in full before completion and inspection. L&I payment and contract guidance

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Sources & further reading

Source review: November 11, 2026. Check current requirements for your property and the product on your roof.