Roof washing in Fort Myers.

The black streaking on Fort Myers roofs is so common that most people read it as normal aging, but it is gloeocapsa algae feeding on the limestone filler in asphalt shingle, and it thrives on exactly what this city provides: months of rain, high humidity off the Caloosahatchee, and shade from the mature canopy through McGregor and the River District. On the newer tile roofs out in Gateway the same growth shows in the pans and valleys.

Our roof washing clears it at low pressure with a solution that kills the algae at the root rather than knocking the top layer loose. That distinction is the whole result: a pressure-washed roof looks better for a few months and comes back, and it comes back on a roof that has lost granules it will not get again.

The landscape below is pre-wet and rinsed so nothing sits on it, and the debris that comes off the roof usually ends up in the gutters, which is what gutter cleaning is for on the same visit. Where the walls have gone green from the same conditions, that is soft washing. More on the area in Fort Myers.