Emergency Roof Leak Repair in San Francisco: What to Do First

The calls we get during the first big atmospheric river of the season all sound the same: water is coming through a ceiling, it started an hour ago, and it is getting worse. What you do in the first thirty minutes matters more than most homeowners realize, because the majority of the expense in a leak event is not the roof repair — it is the drywall, insulation, flooring, and mold remediation underneath it.

First, contain rather than chase. Put a bucket under the active drip, then take a small screwdriver and deliberately puncture the center of any bulging, water-filled ceiling bubble over the bucket. It feels wrong, but a controlled release into a container is far cheaper than a saturated ceiling collapsing across a room. Move furniture and electronics out of the zone and cut power to any circuit where water is near a fixture or outlet.

Second, document everything before you clean up. Photograph the stain, the drip path, the ceiling, and any damaged contents, with timestamps. If you end up filing an insurance claim, sudden storm-driven damage is usually covered while gradual deferred maintenance usually is not, and photos taken during the event are the strongest evidence you will ever have of which one this was.

Third, do not go on the roof during the storm. Wet low-slope membrane and wet composition shingle are both genuinely dangerous, and San Francisco's flat roofs are frequently three stories up behind a parapet with no fall protection. Nothing you can do up there in the rain will outperform a tarp installed properly afterward by someone with the right equipment.

When we arrive, the first job is stopping the water, not selling a roof. Often that means a temporary membrane patch or a properly ballasted tarp, followed by a return visit once the deck has dried out and the actual source is visible. Leaks travel — the entry point is frequently many feet uphill from the interior stain, commonly at a failed flashing, a clogged drain, or a seam that opened in the sun rather than at some dramatic hole. We give you the permanent repair quote after we can see the real cause, and if that quote is $600 instead of a re-roof, we will tell you so.

If you are dealing with an active leak right now, call 415-872-9300. We respond next day for active leaks across San Francisco and will talk you through containment on the phone in the meantime.