Merced, CA
Roof Cleaning in Merced, CA
Grime Getterz cleans Merced roofs with a low-pressure soft wash only, never a pressure washer. A sodium-hypochlorite-based solution kills the algae and lichen, and the streaks rinse away. High pressure strips granules off shingles and cracks tile, so it never touches a roof we clean.
Why Merced roofs streak and grow
Those black streaks are Gloeocapsa magma, an algae that feeds on the limestone filler in shingles. Merced's long Tule fog season gives it weeks of damp to spread, especially on north-facing slopes that stay wet all winter. Left alone it holds moisture against the roof and shortens shingle life; it also eats curb appeal from the street.
Soft wash is the only safe method
A pressure washer on a roof is property damage. It blasts the protective granules off composition shingles and cracks the concrete tile that covers most newer north Merced homes. Our soft wash applies the cleaning solution at little more than rain pressure, lets the chemistry kill the growth, and rinses gently. Same result manufacturers specify, no destruction.
Shingle and tile, older and newer
The established neighborhoods near Bear Creek and downtown run heavily to composition shingle, often with tree debris and moss in the shade lines. The newer tracts toward UC Merced are mostly concrete tile, which grows lichen along the exposed edges. We clean both, and we walk tile carefully or work from the edge because tile breaks underfoot.
Questions We Actually Get
What are the black streaks on my roof?
Gloeocapsa magma algae, feeding on the limestone in your shingles. Merced's damp foggy winters help it spread. A soft wash kills it and the streaks rinse away.
Will roof cleaning damage my shingles?
Soft washing will not: it works at low pressure. What damages shingles is pressure washing, which strips the granule layer. We never put high pressure on any roof.
How long does a roof cleaning last in Merced?
Typically three to five years. Shaded roofs and homes that sit in the thick of the fog belt may see growth return sooner; sun-exposed slopes stay clean longer.
Do you clean tile roofs too?
Yes. Concrete tile common in north Merced gets the same soft wash treatment. We take care with foot traffic since tile cracks under careless weight.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.