The Bottom Line:
Paint does not bond to dirt. In Jacksonville’s humid, salt-air climate, mildew, algae, and pollen build up on siding faster than almost anywhere else in the country, and any of it left on the surface becomes a layer between your house and your new coat of paint. Pressure washing before painting is the most important step of painting prep, and skipping it is the most common reason a paint job starts peeling in a year or two.
Florida Weather Does Not Go Easy on Exterior Paint
Jacksonville sits in a humid subtropical climate with more than 50 inches of rain a year and long stretches of heavy humidity from June through September. Summer highs run into the high 90s. Afternoon storms soak everything, and then the sun bakes it dry.
That cycle is hard on your home’s coating. Moisture works into any gap it can find, UV breaks down the binders that hold pigment together, and shaded walls grow mildew fast enough to turn green in a single season. Homes near the water in Ponte Vedra, Atlantic Beach, and Neptune Beach deal with salt air on top of it all.
The good news is that a good, professional paint job handles this. Good paint applied over a dirty surface does not. When homeowners tell us their last exterior paint job only lasted three or four years, the problem usually isn’t the product… It’s what was underneath it.
What Pressure Washing Actually Removes
Your siding might look clean from the driveway, but up close, it’s carrying a layer of buildup that no brush or roller can push through:
- Mildew and algae. That green and black staining on your siding is a living organism, and painting over it does not kill it. It just keeps growing under the new coat.
- Chalking. As older paint breaks down in the sun, the binder degrades and releases loose pigment. If you rub a faded wall with your hand, and powder comes off, that’s chalk. New paint applied over it bonds to the powder, not to your house.
- Pollen, dust, and grime. Spring pollen in Northeast Florida is heavy enough to coat an entire house in just a few days.
- Loose and failing paint film. Washing lifts the edges of anything already letting go, which tells us exactly how much scraping the house needs.
Washing also does something a lot of homeowners don’t expect: it exposes small problems before they become larger, costly issues. Soft or rotten wood, failed caulk joints, open seams, cracked stucco, and rust bleed all become visible on a clean surface. Finding those during exterior paint prep costs a fraction of what it costs to find them after the final coat.
DIY Pressure Washing vs Professional Prep
A rented pressure washer and a Saturday afternoon can certainly get a house wet… But that’s not the same as safely cleaning it or prepping it for paint.
Pressure is the wrong tool for most parts of the house
High pressure drives water behind siding, forces it into stucco cracks and window seals, splinters up wood, and can strip the surface of a vinyl panel. Most of the cleaning that matters before painting is chemical, not mechanical. The right approach on a house exterior is soft washing: low pressure, correct detergent, proper dwell time, and a thorough rinse. That kills mildew at the root.
Every surface has its own settings
Cedar shake, coquina, stucco, aluminum, vinyl, and painted wood trim all want different pressure and different chemistry. Getting it wrong on one wall can add repair work to the project.
Drying time is part of the job
Wood needs to come back down to an acceptable moisture level before primer or paint goes on. Painting outside wood that is still holding water traps that moisture under the film, and blistering follows. This is why timing between the wash and the first coat matters as much as the wash itself.
Water has to go somewhere
Runoff, landscaping, screened enclosures, light fixtures, and neighboring properties all need to be accounted for. These are the kinds of considerations that professionals keep in mind.
If you want your driveway to look clean, a DIY pressure wash can certainly get the job done. But if you’re about to spend real money on exterior painting or staining, that wash is load-bearing. It’s worth calling a professional every time.
How The Painting Craftsmen Handle Prep
We are a painting company with a full team of pressure washing specialists on staff. Our sister company, First Coast Home Pros, is a full-service professional home services and cleaning company serving Jacksonville. Because both businesses are owned and operated under the same roof, you get trusted pressure washing and artisan home painting services without having to hire and manage two different companies.
That matters because most painting contractors treat washing as a quick step before the real work starts. We treat it as its own trade.
On a typical exterior project, prep looks like this:
- Wash: Washing at the correct pressure and chemistry for each surface on your home.
- Dry: We give surfaces the time they need before anything gets coated.
- Inspect and repair: Rotten wood replacement, stucco repair, and any issues the cleaning revealed.
- Scrape and sand: Removing every bit of failing paint film and feathering at the edges.
- Caulk: Sealing gaps, joints, and penetrations where water gets in.
- Prime: Spot priming bare surfaces and repairs, or full priming when the situation calls for it.
- Paint: Premium products applied with precision.
Work With Exterior Painters Who Prep the Right Way
Before we quote your exterior paint project, we want to see what is on your siding. Our estimators walk the property with you, point out the mildew, chalking, and salt film a paint job would otherwise seal in, and scope the wash your home actually needs. That washing work is written into the estimate up front, not added on after we get started.
If you are not ready to paint yet, we’ll still wash it. Roofs, siding, driveways, pool decks, fences, and decks can all be booked on their own, and a clean exterior gives you a much clearer picture of what your paint project will involve when the time comes.
The Painting Craftsmen is licensed, insured, and Lead-Safe Certified.
Call or text 904-507-5700 or email contact@paintingcraftsmen.com for a free estimate.