Tile roofs in Bonita Springs take on a look over time. Dark streaks running down the slope. Splotches that spread out from the shaded side. It reads like permanent staining, and a lot of homeowners assume the tile is just ruined.
It usually isn't. That black is alive, and live growth can come off.
What You're Actually Looking At
The streaking is a type of algae that thrives in warm, damp climates. Florida is about as ideal as it gets. It clings to the porous surface of tile, feeds, and spreads, and the shaded parts of the roof that stay wet longest are where it digs in hardest.
So the question isn't really whether it can be removed. It's whether it gets removed the right way.
Why Pressure Alone Is the Wrong Move
Here's where people get into trouble. The instinct is to blast it off with high pressure. On tile, that's a mistake.
Tile cracks and chips under heavy pressure. The protective coating wears down. Water gets forced under the tiles and into places it shouldn't go. You might strip the visible algae and create a leak in the process. The roof looks better for a season and worse for years.
High pressure and tile don't belong together.
The Method That Works
The answer is soft washing. Low pressure, plus a cleaning solution made to kill the algae at the source. It works like this:
- The solution is applied to the tile and the growth, top to bottom
- It breaks the algae down rather than scraping it off
- A gentle rinse clears it away without stressing the tile
- The roots that cause regrowth get treated, not just the surface
The difference shows up later. A soft-washed roof stays clean far longer because the growth is killed, not just knocked back.
Will Every Stain Come Off?
Most of it, yes. Black algae and the green and gray growth around it lift well with the right treatment. The roof comes back looking close to how it started.
A few things to be straight about. Tile that's been left for many years may have some shadowing in the most porous spots. Mineral deposits or rust from metal flashing are a different problem and don't always clear fully. A good crew will tell you upfront what's coming off and what might not, instead of promising a perfect roof and hoping.
Why It's Worth Doing Sooner
The longer black algae sits, the deeper it works into the tile and the harder the cleaning gets. It also holds moisture against the roof, and that's never good for the surface underneath.
Catch it earlier, and the job is gentler, faster, and the result holds longer. Wait, and you're fighting years of buildup.
So if your tile roof in Bonita Springs is wearing those dark streaks, the tile is very likely fine underneath. The growth just needs the right treatment. Under Pressure Cleaning & Sealing Services cleans tile roofs the safe way. Give us a call, and we'll come take a look.
