How to Compare Roof and Pressure-Washing Providers
Start with access and fall risk
Roof and ladder work creates fall risk for property owners and contractors. Review OSHA ladder-safety guidance and ask how the provider will access the requested areas, control the work zone, account for weather, and handle surfaces that are too fragile or damaged to clean.
Require a material-specific method
The proposal should identify roofing or surface material, coating, age, repairs, visible condition, manufacturer guidance, pressure, products, dwell time, rinsing, landscape and runoff precautions, test areas, and exclusions. Lower pressure can reduce one risk factor but does not make a method risk-free.
Compare written scopes, not superlatives
Ask each provider to document dimensions, access, included surfaces, observable result, customer preparation, service contact, planned window, price, payment terms, cleanup, and exclusions. A low or high quote does not by itself establish quality, savings, or risk.
Verify documentation
Request current insurance documentation and an explanation of any state or local credentials applicable to the exact scope. Confirm names, dates, coverage, and who will perform the work rather than relying on a general website statement.
Put any warranty or remedy in the agreement
Do not assume a warranty, correction, repair, reimbursement, or satisfaction promise. If a provider offers one, the accepted quote should state its duration, covered result, exclusions, notice process, and remedy. Inspect the completed scope and promptly document any concern.
Understand what cleaning does not establish
Cleaning is not a roof inspection or repair and does not promise a fixed service-life extension, avoided replacement, permanent stain removal, plant survival, or health outcome. Suspected leaks, structural defects, failed coatings, or fragile roofing require the appropriate repair professional.
Request Cool Breeze’s written scope or compare the same details with another provider before accepting roof-cleaning or pressure-washing work.
What a material-specific method actually contains
Two numbers separate a described method from a slogan. Soft washing is generally applied under 100 PSI. Pressure washing of sound hard surfaces such as concrete typically runs in the 2,000 to 4,000 PSI range. A property normally needs both, on different surfaces, which is why one figure quoted for a whole house is not a method.
The chemistry belongs in the proposal too. Organic growth is treated with a diluted sodium hypochlorite solution blended with biodegradable surfactants, applied under the conditions the product label sets. The label governs dwell, rinsing, and the runoff and landscaping precautions that follow from them.
The published guidance a proposal should reference
For asphalt roofing, the Asphalt Roofing Manufacturers Association publishes an algae-discoloration bulletin covering blue-green algae discoloration and material-specific care. Individual shingle, tile, and coating manufacturers publish their own care instructions, and where those exist they control. For access, OSHA's ladder-safety guidance positions a non-self-supporting ladder so the horizontal distance from foot to top support is about one quarter of the working length.
A provider does not have to quote these documents from memory. They should, however, be able to say which apply to the scope being proposed and how the proposed method sits against them.
Comparing two quotes that are not alike
Quotes become comparable only once both describe the same work. Ask each to state dimensions and included surfaces, the proposed application per surface, customer preparation, the service contact, the planned window, price and payment terms, cleanup, and the exclusions. A quote that omits exclusions is not cheaper; it is less specific.
Frequently asked questions
What should a proposal say about method?
It should name the material, its visible condition, the proposed pressure and products, dwell and rinsing steps, test areas where appropriate, runoff and landscaping precautions, and the exclusions. A proposal that names a price but not a method is not comparable to one that names both.
What pressure figures should I expect to see?
Soft washing is generally applied under 100 PSI; pressure washing of sound hard surfaces such as concrete typically runs 2,000 to 4,000 PSI. A single figure quoted for an entire property is a sign the method has not been matched to the surfaces.
What standards can I ask a provider to reference?
For asphalt roofing, the Asphalt Roofing Manufacturers Association publishes algae-discoloration guidance, and the shingle or tile manufacturer publishes its own care instructions. For ladder and roof access, OSHA publishes ladder-safety guidance. None of these promise a result, but a provider should be able to say which apply to your scope.
Does a lower quote mean more risk?
Not by itself. A low or high quote does not establish quality, savings, or risk. What is comparable is the written scope behind it: the surfaces included, the method proposed, the precautions, the exclusions, and the documentation the provider carries.