Roof Repair in San Francisco - Written Price, Workmanship Warranty

Fast, Reliable Roof Repair Across San Francisco

Roof repair in San Francisco means dealing with flat tar-and-gravel roofs, cracked parapet flashings, and tight lots between row houses. That’s the work we do every week. If water is coming in, call (361) 320-9467 and we’ll have a technician out to look at it. We know what a Sunset district roof looks like after the first October storm, and we know what a Mission light well looks like when the waterproofing finally fails. You need a roofer who understands this city’s specific problems, not someone who shows up with a one-size-fits-all repair sheet.

Key Takeaways
– Most San Francisco roof leaks trace back to parapet flashing, not the roof membrane itself
– Written price in hand before any work starts, always
– Background-checked, uniformed technicians on every call
– 365-Day Done Right Promise: any repair that fails within one year gets a free return visit
– We service every San Francisco neighborhood with fast local dispatch

Why Brennan Roofing Is San Francisco’s Preferred Roof Repair Company

We’re a local Roof Repair crew that operates under a defined standard: written pricing before any work begins, technicians who show up when they say they will, and a guarantee in writing for one full year. That’s rare in San Francisco roofing. A lot of homeowners here have been through the cycle: someone comes out, gives a verbal number, starts the job, and then finds “extra damage” that doubles the bill. We don’t do that. The Garrison Standard means the price goes on paper before we touch your roof, and it does not move at the door.

San Francisco homeowners call us because they want to know who is on their roof. Every Brennan technician is background-checked and arrives in uniform. You can see exactly who is walking across your parapet. And when you call our office, a live person answers. No voicemail tree, no callback queue. That matters when water is coming through your ceiling at 9 p.m.

Working in San Francisco specifically means dealing with tight access, narrow lots, and shared party walls. We coordinate with neighbors when a repair touches a shared wall, and we know how to get materials up to a roof when there is no rear yard and the street is the only staging area. That’s not a generic roofer’s problem. It’s a San Francisco problem.

Metal Roof Repair in San Francisco

Metal Roof Repair in San Francisco is a specialized job, and it comes up most often on the handful of standing-seam roofs in the Marina and on retrofitted commercial and mixed-use buildings. We see metal roofs on flat-topped additions, bay window caps, and modern rebuilds in Noe Valley and Glen Park. The work involves inspecting seam fasteners, resealing lap joints, replacing deteriorated butyl tape, and re-flashing at parapet transitions and curb penetrations. Metal roofing in San Francisco takes a beating from salt-laced fog and constant moisture, especially within a half mile of the ocean.

Standing-Seam Leak Repair

A standing-seam metal roof leaks at the seams, fasteners, or penetrations, not usually in the middle of the panel. In San Francisco’s damp climate, we check for failed sealant at end laps first. That’s the most common failure point on metal roofs here. Repair means cleaning the lap, re-sealing with the correct butyl or urethane, and re-crimping if the seam has opened.

Parapet Metal Re-Flashing

Metal parapet cap flashing on San Francisco roofs gets hammered by wind-driven rain. When the cap seams open, water runs down behind the parapet and into the wall cavity. We re-flash parapets with the correct lap and sealant, and we inspect the counterflashing where the wall meets the roof membrane. Metal roof repair in San Francisco typically runs $650 to $1,800 depending on seam count and access, with a written quote before anything starts.

Commercial Roof Repair in San Francisco

Commercial Roof Repair in San Francisco is about keeping water out of buildings that cannot afford downtime. We work on low-slope commercial roofs across the city, from the small auto-body shops on Bayshore to the mixed-use blocks in the Outer Richmond. These are mostly modified-bitumen, tar-and-gravel, or single-ply roofs, and they fail exactly where residential flat roofs fail: at drains, parapets, and penetration flashing. What’s different with commercial work is the stakes. A leak over a retail space or server room is a liability, not a nuisance.

Low-Slope Membrane Repair

A commercial roof membrane repair in San Francisco usually means finding a puncture, split, or failed seam and patching it with the correct compatible material. We check the drain lines first. Clogged drains behind parapets cause ponding, and ponding water will find every weakness. A patched membrane without clearing the drains is half a repair.

Tenant Improvement Roof Tie-Ins

When a San Francisco commercial building adds HVAC units, vents, or skylights, the penetrations are a leak risk. We re-flash curb penetrations and reseal around pipe supports on low-slope roofs. Commercial roof repair in San Francisco runs $800 to $2,500 for typical patches and re-flashing work, with a written line-item quote before any work starts.

Trusted Brands We Service in San Francisco

We install and service materials from the leading manufacturers, and for San Francisco homes we most often work with GAF for steep-slope and modified-bitumen applications, plus Atlas and Tamko when the job calls for a specific shingle profile or performance rating. Because we stock common components locally, we can turn around most San Francisco repairs quickly without waiting on out-of-state parts. We will tell you plainly what each brand costs and why we recommend it for your specific roof, so you choose with actual information, not a sales pitch.

Common Roof Repair Problems We See in San Francisco Homes

• Cracked parapet flashing. On pre-1950 row houses, the parapet wall is the most common leak source, and water travels into the party wall before you even see a ceiling stain. We see this constantly in the Mission and Noe Valley, and it’s often misdiagnosed as a membrane problem.
• Clogged roof drains behind parapets. Flat tar-and-gravel roofs in the Sunset and Richmond hold water when drains clog, and that ponding rots decking and framing before the interior shows any sign. Clearing the drain is part of the repair, not a separate upcharge.
• Light-well and skylight penetration leaks. Interior light wells on Edwardian flats stay damp year-round in San Francisco’s fog. Failed waterproofing at these penetrations never dries out, so the leak is chronic until the flashing is replaced.
• Rooftop deck penetrations breaking the membrane. Many San Francisco roofs host decks, and every post or rail that punches through the waterproofing is a future leak. We re-flash each penetration and seal it so the membrane stays continuous under foot traffic.

Pricing for Roof Repair in San Francisco, CA

We Also Serve Cities Near San Francisco

We serve Roof Repair in San Francisco and the surrounding communities, including Daly City, Brisbane, Sausalito, and South San Francisco. Each of those cities has its own weather patterns and housing stock, but the same written-pricing standard applies everywhere we work.

FAQs About Roof Repair in San Francisco

Why does my San Francisco roof leak every fall, right after the first big storm?

Because the first heavy rain after a dry summer lands on cracked parapet flashing and clogged roof drains, and those failures happen all at once. The dry season opens small gaps in old tar and metal flashing, and the first storm drives water into them. Call (361) 320-9467 and we will find the specific entry point, not just patch what’s visible.

Do I need a permit to repair my roof in San Francisco, and what does opening it up actually turn up?

A repair patch on the membrane usually does not trigger a permit, but once we open a roof or wall and find structural issues or outdated wiring, the city requires code upgrades, and that work gets priced and approved in writing before we proceed. We write allowances into the contract for exactly this reason. You will see every number before we touch it.

What’s a square, and how do I compare two roof repair quotes in San Francisco?

A square is 100 square feet of roof area, and roofers price materials and labor per square. Two quotes may look different because one includes tear-off and disposal of old layers while another does not. We give you a line-item written quote that separates material, labor, tear-off, and disposal, so you can compare actual numbers.

How long does a roof repair take in San Francisco’s rainy season?

A standard parapet or leak repair takes one to two days once weather allows. The issue in San Francisco is the dry windows. We cannot tear off in the rain, so the first dry stretch after a storm gets busy for every roofer in the city. Schedule early, or call before the rains hit.

Can you match the look of my historic San Francisco roof and parapet?

Yes. We work with flat and low-slope systems that match the original profile of Victorian and Edwardian rooflines, and we re-flash parapets without changing the street-facing character. The waterproofing gets updated; the look stays the way it has looked for a hundred years.

Get Your Roof Repair Started in San Francisco

Travis Oakley runs Brennan Roofing here in San Francisco, and he stands behind every repair we do. The Garrison Standard is the same on every job: written price before any work starts, background-checked uniformed technicians, and a 365-day written guarantee. If a repair fails within one year, we come back and fix it at no charge. Call (361) 320-9467 to schedule your free estimate and get the number in writing before you decide anything.

Written by Travis Oakley, Owner at Brennan Roofing, serving San Francisco, CA.