Roof Repair That Fixes the Actual Problem — Not Just the Symptom
A leak rarely starts where the water shows up inside. We trace it back to the source, repair it properly, and show you exactly what we found.
Common Roof Repairs We Handle in San Francisco
San Francisco roofs deal with a different combination than most of the state: near-constant marine-layer fog that keeps shaded sections damp, salt air off the Bay that corrodes metal fasteners and flashing, and a housing stock heavy on Victorians and Edwardians where a flat rear addition hides behind the street-facing parapet. Most repair calls we get fall into a few categories:
- Active leaks — traced from the interior stain back to the actual entry point, which is often on the hidden flat section rather than the visible pitched roof.
- Moss and moisture damage — common on north-facing and shaded slopes that stay damp for days after the fog rolls through, left unrepaired it accelerates wood rot underneath.
- Damaged or corroded flashing — around chimneys, vents, and parapet caps, usually the #1 hidden source of "mystery" leaks in this climate.
- Soft or sagging deck sections — a sign of longer-term moisture intrusion that needs deck repair, not just a patch.
- Ponding water on flat sections — an early warning sign on low-slope rear additions before the membrane actually fails.
What a Repair Visit Looks Like
- Full roof walk, not just the reported spot — we check the pitched front, the flat rear section if you have one, flashing, and penetrations.
- Photos of what we find, explained in plain language before any work starts.
- A written repair estimate — you approve it before we touch anything.
- Repair completed, debris cleared, and the area rechecked for any secondary damage.
When Repair Isn't Enough
If the damage is widespread or the roof is past its useful life, we'll tell you straight — here's where to look next.
Roof Replacement
Full tear-off and replacement when repair no longer makes sense.
Learn more about Roof ReplacementFlat Roofing
TPO and modified bitumen for the low-slope sections behind Victorian parapets.
Learn more about Flat RoofingEmergency Roofing
24/7 response for active leaks and urgent damage.
Learn more about Emergency RoofingRoof Repair Questions
How do I know if my roof needs repair instead of full replacement?
If damage is isolated to a small area — a handful of lifted shingles, a single flashing leak, or one soft spot on the deck — repair is usually the right call. We'll tell you honestly during the free inspection if the roof is old or damaged enough that replacement makes more financial sense.
How fast can you fix a leak?
For active leaks we prioritize same-week service, and same-day for anything causing interior damage. Call (628) 276-1156 and we'll get a crew scheduled.
Do you repair roofs you didn't originally install?
Yes. Most of our repair calls are on roofs we've never touched before. We inspect the whole roof, including the flat rear section if you have one, not just the reported problem area, so nothing gets missed.
Will a repair void my roof's warranty?
Manufacturer warranties vary, but professional, documented repairs typically don't void coverage. We'll flag if a repair could affect your existing warranty before we start.
Got a Leak or Moss on Your Roof?
Free inspection, written estimate, no pressure. We serve Hayes Valley and San Francisco.