Dublin, CA
Roof Cleaning in Dublin, CA
We clean Dublin roofs with soft washing only: low pressure and a sodium hypochlorite treatment that kills black streaks, moss, and lichen without disturbing tile or shingles. High pressure never belongs on a roof. It voids warranties, strips granules, and cracks the concrete tile common across East Dublin.
What the black streaks actually are
The dark runs on Dublin composition roofs are Gloeocapsa magma, a bacteria that eats the limestone filler in shingles and spreads by wind. It shows first on north slopes, which stay damp through Tri-Valley winters. On East Dublin's tile roofs the same conditions grow lichen and moss in the tile channels. None of it rinses off; it has to be killed.
Tile roofs need a careful touch
A large share of Dublin homes built since 2000 carry concrete tile. Tile handles weather well and foot traffic badly, and it should never see high pressure, which cracks tiles and forces water beneath the underlayment. We treat tile from ladders and ridge lines where possible and keep roof walking to a minimum.
Protecting the biggest surface you own
A roof is the most expensive surface on the house, and organisms that hold moisture against it shorten its life. Soft washing removes the growth and the streaking, restores the roof color, and typically holds three to five years in Dublin's climate. If your HOA has flagged roof staining, this is the fix that lasts.
Questions We Actually Get
Is soft washing safe for concrete tile roofs?
Yes. It is the only safe method. The detergent does the work at garden-hose pressure, and we minimize walking on the tile itself.
How long does a roof cleaning take?
Most Dublin homes take half a day. The detergent keeps working after we leave, so remaining streaks fade over the following weeks.
Will rain rinse my roof clean if I wait?
No. Gloeocapsa magma is rooted in the shingle surface. Rain feeds it. Waiting only gives it more roof.
Ready to make it look new again?
Fast scheduling. Photo-documented results. A written quote before any work starts.