San Francisco roofs take a beating. Fog rolls in most mornings, then the afternoon sun bakes the shingles. That constant wet-dry cycle makes rot, granule loss, and flashing failure happen faster here than anywhere else in the Bay Area. We're North Bay Roofing CO, a licensed and insured roofing contractor that's been fixing and replacing roofs across the city—from the Mission District to Pacific Heights.
Common Roof Problems in San Francisco
Every neighborhood has its own quirks, but these are the issues we see most often on SF roofs.
- Leaks around flashing — where the roof meets a chimney or wall, the metal flashing corrodes and water seeps into the deck.
- Granule loss on south-facing slopes — the afternoon sun erodes the asphalt granules, leaving the mat exposed and the shingles brittle.
- Rot in the roof deck — fog and rain wick into any gap, and before you know it, the plywood starts to decay.
- Sagging rooflines — older homes in Nob Hill often have undersized rafters that settle over time, creating low spots where water pools.
- Storm damage — winter Pacific storms tear off shingles and dent gutters, especially in the Sunset District near the ocean.
How We Protect San Francisco Roofs
We use the same methods on every job, whether it's a quick repair or a full tear-off.
- Tear-off and re-deck — we strip the old shingles, inspect the deck for rot, and replace any damaged plywood before we lay new underlayment.
- Self-adhered underlayment — this sticks to the deck and seals around nails, keeping water out even if a shingle blows off.
- Ring-shank nails — these grip the shingle better than smooth nails, so they hold up in wind and temperature swings.
- Starter course and field courses — we install the first row correctly and stagger every course above it, so water runs off instead of finding a path in.
- Ventilation check — a hot, damp attic causes shingles to curl and the deck to rot. We fix the airflow while we're up there.
Why San Francisco Homeowners Choose Us
We don't cut corners, and we don't disappear after the job. Here's what you can count on.
- Honest estimates — we walk the roof, take photos, and give you a line-item estimate. No vague numbers.
- We respect your building — Victorians in Pacific Heights and Edwardians in the Mission need careful handling. We protect the roofline, the gutters, and the neighbors' cars.
- Emergency repair — a leak during a storm can't wait. We prioritize calls from SF homeowners and property managers.
- Insurance claim help — if storm damage caused the leak, we'll document it and help you talk to your adjuster.
Need a roofer who knows San Francisco? Call us at 415-687-5270 for a free estimate. We serve all of SF, including the Mission District, Pacific Heights, Sunset District, and Nob Hill.