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Roofing in San Francisco, CA

Professional roofing services in San Francisco, CA. Licensed, insured, and locally operated.

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Serving San Francisco and Surrounding Areas

Roof Problems San Francisco Homeowners Actually Face

Fog rolls in most mornings and Pacific storms drop weeks of rain between November and March, so a San Francisco roof stays damp far longer than it should.

The housing stock compounds it: flat and low-pitch roofs on Victorian and Edwardian buildings, parapets that trap water behind scuppers, and original wood sheathing patched for decades.

  • Ponding water on flat roofs — a clogged scupper or downspout lets water sit on a built-up roof or membrane until it delaminates and seeps through the roof deck.
  • Granule loss on asphalt shingles — UV and salt air erode three-tab and architectural shingle surfaces, exposing asphalt and letting water wick down into the felt, tar paper, and wood decking.
  • Flashing failures along the roofline — step flashing, counter-flashing, chimney flashing, and a cracked pipe boot are where most leaks begin, usually at a valley or where a dormer meets the field course.
  • Rot and decay at the fascia and eave — water spilling off a clogged gutter soaks the fascia, soffit, and drip edge, and the rot travels into rafters and truss tails before it ever shows indoors.
  • Sagging roof planes and ridge lines — a settled rafter or a wet purlin and batten assembly reads as a dipped roofline, and ignoring it turns a repair into structural framing work.
  • Condensation and poor ventilation — a blocked soffit vent or dead attic fan holds moisture in the insulation, which flakes paint, spalls the sheathing, and grows mold on the underside of the roof deck.
  • Wind uplift on hillside and mansard roofs — exposed fasteners, overdriven nails, and missing sealant at the rake and verge let winter gusts peel the overhang and awning edges loose.

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