How to Compare Roof and Pressure-Washing Providers
Why 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.
Why 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.
Why compare written scopes?
Ask each provider to put in writing the dimensions, access, included surfaces, observable result, customer preparation, service contact, planned window, price, payment terms, cleanup, and exclusions. A superlative on a website tells you nothing about that work. The price on a quote cannot tell you its quality, savings, or risk either.
How do you verify documentation?
Request current insurance documentation and an explanation of any state or local credentials that apply to the job. Confirm names, dates, coverage, and who will do the work. A general statement on a website is not enough.
Should any warranty or remedy go 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. Check the finished work against the scope and write down any concern right away.
What does cleaning not promise?
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 need the right 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 does a material-specific method contain?
Two numbers tell you whether a proposal describes a method or a slogan. Soft washing is usually 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. So one figure quoted for a whole house isn't a method.
The chemistry should be 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 sets dwell, rinsing, and the runoff and landscaping precautions that go with them.
Which care instructions should you check before cleaning?
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 doesn't have to quote these documents from memory. They should be able to say which ones apply to the proposed scope and how the method compares with them.
How do you compare two quotes that are not alike?
You can only compare quotes that 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 leaves out exclusions isn't cheaper. It's just 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. You can't compare a proposal that names only a price with one that names a price and a method.
What pressure figures should I expect to see?
Soft washing is usually applied under 100 PSI. Pressure washing of sound hard surfaces such as concrete typically runs 2,000 to 4,000 PSI. One figure quoted for a whole property suggests the method hasn't 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. The price on a quote cannot tell you its quality, savings, or risk. Compare the written scope behind it: the surfaces included, the method proposed, the precautions, the exclusions, and the documentation the provider can show.