Enjoy 10% Off Full Roof Replacements
Get a Quote Now!
Active leak, pooling water, or visible membrane damage, SF’s rainy season and daily fog push flat roofs toward failure faster than most owners expect. Both residential and commercial properties in San Francisco get the same response from Roofworx: a licensed crew on-site, no subcontractors.
Seams open. Drains clog. Flashings pull away from walls. When any of these fail, water finds the deck fast. One call to Roofworx puts a crew on it, residential or commercial, no referrals, no subcontracting. Our flat roofing services handle the full job in-house.
SF winters are wet enough that a small puncture or open seam becomes a big problem quickly. We lift the compromised section, dry the substrate, and bond new material to the existing system for flat roof membrane repair that actually holds through the next rainy season.
That ceiling stain is not where the water entered; it is where it ended up. Flat roof leak repair means chasing moisture back through the roof assembly to the actual breach, then sealing it so the same path stays closed.
Every pipe, vent, skylight and HVAC curb is a termination for the membrane. Those terminations corrode, shrink away from walls and crack with temperature fluctuations. We rebuild each one using materials matched to that specific penetration.
A blocked drain collar or sunken low spot keeps water on the membrane long after rain stops. We clear obstructions, correct slope problems, and restore flow so the flat roof drain does its job after every storm.
Loose edge metal and failed gravel stops give wind a starting point. Water follows. We re-secure perimeter components so nothing is working under the membrane from the outside.
Blistered or cracked sections get cut out, the substrate dried, and compatible patch material installed before the problem reaches the structural deck below.
When a storm opens up a membrane or a drain backs up mid-rain, emergency flat roof repair is the only answer. We dispatch same-day for active leaks and failures that cannot sit; call us directly for emergency roof repair.
Membrane sitting under standing water for two days or more breaks down faster than anything else. A drainage or slope issue is almost always the cause.
Brown stains or soft drywall below a flat roof mean moisture is already through the membrane and into the structure.
Once the membrane surface opens up, SF’s fog-driven moisture cycles keep the damage moving. It does not stop on its own.
Debris, a collapsed collar, or a failed drain body, any of these forces water to sit rather than exit, and ponding does the rest of the damage.
Job scope drives the number; a small patch costs a fraction of what a full membrane section or flashing rebuild runs. Access difficulty and permit requirements add to that on some properties.
Flat roof damage may be covered under your homeowners or commercial property insurance policy; coverage depends on individual policy terms and the cause of damage. We prepare all required documentation at no extra charge.
For residential flat roof repair across San Francisco, Roofworx has been the contractor property owners call back. Over a decade of Bay Area work, an A+ BBB rating, and no subcontracting on any job.
California Contractor License #1099501. Licensed, bonded, and insured, your property stays protected at every stage, from the first inspection through final walkthrough.
A leaking roof does not wait for a convenient slot on the calendar. Roofworx offers same-day dispatch for urgent flat roof situations throughout San Francisco.
TPO, EPDM, modified bitumen, torch-down, and built-up roofing, our crews work on every membrane type in-house without sending work elsewhere.
Materials, labor, and permit fees are all itemized before work begins. The number you approve is the number on the invoice.
Over a decade of flat roof work across the city and Bay Area, backed by an A+ BBB rating and 158 verified customer reviews.
A good flat roof repair contractor gives you a price before touching anything, moves fast when a leak is active, and puts the warranty in writing. That is how Roofworx works on every job.
We walk the full membrane surface and trace moisture to the entry point itself, not the nearest visible sign of it.
Every damaged area gets photographed and priced out. You see the full cost before anything gets scheduled.
We select repair materials that match your existing system, TPO, EPDM, modified bitumen, and torch-down, so the repair bonds properly in the long term.
Our own licensed crew does the work. No handoffs, no subcontractors, manufacturer-compatible methods throughout.
Drainage gets tested across the full roof once repairs wrap up. If water is not moving off the way it should, we find out before we leave.
Final walkthrough, finished work documented, warranty papers in your hands before the crew packs up.
Roofworx holds a 4.7-star rating across 158 reviews from San Francisco property owners who hired us for flat roof repair and kept calling us back.
Most of the time, yes, but it depends on what the inspection finds. Localized damage with a solid deck underneath is a repair. Widespread membrane failure or a compromised deck is a replacement conversation. We give you a straight answer after we see it.
Expect 5 to 10 years out of a solid repair, sometimes more. TPO and EPDM systems tend to hold longer than older bitumen patches when the substrate is dry and the bond is clean. We use manufacturer-matched materials on every job to get the most out of that range.
Failed flashing at penetrations, lifted seams from thermal cycling, blocked drains causing ponding, and membrane brittleness from age and fog-driven moisture are the main culprits in SF’s climate.
Flat roof damage may be covered under your homeowners or commercial property insurance policy; coverage depends on individual policy terms and the cause of damage. We prepare all required documentation at no extra charge.
Spot repairs start in the low hundreds. Larger membrane sections, flashing rebuilds, or drain replacements run higher based on scope and access. A written estimate with photos follows every inspection, before any work is scheduled.
Any size. A single blister, a failed seam, a cracked drain collar, there is no minimum repair size. Small problems get the same thorough repair as large ones.
Temporary patches give water a chance to find a new way in. Roofworx delivers permanent results in San Francisco: licensed crew, written warranty, same-day dispatch available, and over 10 years of Bay Area flat roof work behind every job.
Roof leak detection and repair crews from Roofworx run jobs across every part of the city, hillside homes, flat commercial blocks, and everything in between. Current service areas include The Mission, Pacific Heights, Sunset District, Richmond District, Noe Valley, and Glen Park.
Flat roof
Law pitch roof
Regular pitch roof
High pitch roof
