Roof cleaning south florida: The Florida Guide
By Marcy Doleman, Commercial roofing estimator. Reviewed by Hal Winstead, Editor, licensed roofing contractor.
Last March I was on a low-slope TPO roof behind a school in Homestead, and the afternoon sun had softened the membrane just enough that my boot left a print. I found a patch near the south parapet that looked neat from the ladder. When I peeled the corner back, the cover board was spongy and the deck underneath was wet. That is the problem with a dirty roof: it hides bad repairs until you're standing on it. If your building is due for a coating, a reroof, or an insurance inspection, you may be tempted to start with roof cleanning south florida, and the roof cleaning companies in Florida directory is a reasonable place to build a short list. Just check every contractor on the DBPR roll before you let them near the membrane.
Roof cleaning south florida is not power washing. Not on flat commercial roofs, anyway. TPO, PVC, and modified bitumen don't like a pressure wand aimed at seams, curbs, and flashings. I've been wrong before about what a layer of algae is hiding, but I've never once been wrong that pressure washing a single-ply roof is a bad idea.
I want roof cleaning to happen before I write a number, not after. It makes my estimate either simpler or more expensive. Both outcomes beat guessing.
What roof cleaning south florida means on a flat commercial roof
Most of my cleaning questions are actualy coating questions. A warehouse owner wants a reflective coating to carry the roof five more years. A school district wants a base sheet and smooth modified proposal that will be easier to maintain. A property manager wants a stain gone because a tenant is bothered by looking at it.
Dirt alone doesn't fail a roof. It fails because it hides the things that fail. Once the roof is clean, I can find the fishmouths, punctures, old patches, ponding areas, and the "we fixed that last year" spots that will be problems next summer. A clean roof also gives the coating crew a fighting chance. Coatings will not stick to biology. That isn't a sales pitch; it's adhesion.
A good cleaning crew works slow. They clear the drains first and leave the strainers out so the rinse water has somewhere to go. They use chemicals matched to the membrane and low pressure, then handwork around penetrations. They photograph everything. That last part matters because I use their photos to decide where to look closer and where to leave alone.
What the DBPR licence prefix actually tells you
Boring part coming, but I've seen permit panic cost more than a roof. Florida roofing contractors are licensed by the Department of Business and Professional Regulation. Pull the person up on the DBPR roll and look for one of the DBPR licence prefixes CCC and RC. A CCC contractor is certified and can work anywhere in the state. An RC contractor is registered and limited to the jurisdiction that issued it. Active status matters too. An expired number means someone else should be on the roof.
A roof replacement in Florida requires a permit pulled from the local building department, and then an inspection. If a contractor offers to skip the permit, walk away. An unpermitted roof can complicate insurance claims and a future sale. The permit isn't the roofer's punishment. It is the record that a third party actually looked at the work.
What I would actually do: Treat any cleaning bid as incomplete if it doesn't name the cleaning method, the chemical, and the drain plan. A "power wash and pray" number is not a roof cleaning quote.
One cleaning story still steams me. A warehouse owner in Fort Lauderdale let a driveway crew wash his modified bitumen roof because the algae looked bad from the parking lot. They used a gas pressure washer. The granules came off in sheets, and my call the next week started with "I think we need a reroof." That's why I talk about cleaning like it's actual roof work. It can be actual roof damage.
Why SB 4-D (2022) changed the old 25% answer
Every Florida owner has heard some version of the 25% rule: start repairing more than a quarter of a roof in a year and the building department can make you bring the whole roof up to current code. That was real, and it still comes up in conversation. But the legislature changed it with SB 4-D (2022). If your roof was built, repaired, or replaced under the 2007 Florida Building Code or later, only the part you're working on has to meet current code. If the roof was built before that, or if the original work was never permitted, expect the old logic to follow you around.
Why do I bring that up in a post about cleaning? Because cleaned roofs reveal damage, damage invites repairs, and repairs invite code questions. Cleaning doesn't make the code decision. The local building official does. Ask the permit question before you commit to a big coating or reroof, not after.
Schedule the wind mitigation inspection after the cleaning, not before
A wind mitigation inspection is not roof cleaning, but it should never happen on a roof the inspector can't see. The standard form is form OIR-B1-1802. It asks the inspector to check roof covering, deck attachment, roof-to-wall connection, roof geometry, secondary water resistance, and opening protection. If algae is crusted over the membrane, the inspector either writes "not visible" or guesses. Neither helps you.
Florida insurers must offer premium discounts for qualifying features. I can't tell you what your specific policy covers, because coverage varies by carrier and by endorsements. Read your declarations page and ask your agent to put the discount in writing. The inspection usually costs far less than the discount it can open up, but that depends on your roof and your premiums.
What I would actually do: Ask the cleaner to photograph every drain and penetration before they leave, then walk the roof myself on a dry morning before any coating or repair bid gets signed.
A South Florida cleaning schedule that makes sense
I try to book cleaning after a few dry days, with another few dry days in the forecast. South Florida afternoon storms are not a joke. A "clean" roof that gets rained on before the coating cures has wasted your money. For a big warehouse or a school, I'd rather see cleaning booked so the coating contractor can follow within the same week. The exact month depends on the building, the roof slope, and the coating spec. Call it a moving target.
Questions I get asked
Is roof cleaning south florida necessary before a coating?
Yes, if I'm writing a coating spec, the roof has to be clean and dry. A coating will not stick to biology, dirt, or old release agent. I of peeled coatings off with my boot in one clean sheet because the membrane underneath was never washed properly.
Do I need a permit just to have the roof cleaned?
Usually not, but cleaning is never a way around the permit proccess. The minute the work becomes repair, replacement, or a coating the building official treats as a roof system change, you need the permit and inspection. A contractor who offers to clean "so we don't have to pull a permit" has already told you everything.
Can I pressure-wash my TPO roof?
No. Don't do it. A pressure washer can open a TPO lap seam or drive water under the flashing, and then you get to learn what wet insulation costs. Low pressure or soft washing with the right chemical is what the membrane wants.
Will my insurance cover roof cleaning?
That depends on your policy. Coverage varies by carrier and by endorsement, so I can't answer from memory. Read your declarations page and ask your agent a direct question about reimbursement before you book the crew, not after.
How do I know if a contractor is licensed?
Check the DBPR roll and look for an active record with one of the DBPR licence prefixes CCC and RC. CCC means the licence is certified and works statewide. RC means registered and limited to the local jurisdiction. If the licence is not active, don't hire.
Should I clean the roof before a wind mitigation inspection?
Yes, so the inspector can actually see the roof covering and attachments. Every line on form OIR-B1-1802 is easier to answer on a bare roof. Then take that report to your insurer and ask what discount your policy allows.