Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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Before
AfterFlat Roof Repair Done Carefully, Nationwide
Flat roof repair usually runs between $400 and $1,500 for a standard residential patch, though the final price depends on the membrane type, how much of the roof is affected, and how easy it is to reach the damaged area. At Birchbark Roofing, we give you a written, line-item quote before any work begins, so you know exactly what you are paying for. We have been repairing roofs since 2000, and we handle flat and low-slope roofs for homeowners and building owners across the United States. If water is getting in, call (424) 766-4937 and we will help you plan the fix.
A flat roof does not shed water the way a pitched roof does. Rain and snowmelt move slowly across the surface, and anything that slows them down, like a low spot, a lifted seam, or a clogged drain, gives water time to find a way in. That is why a small flat roof problem can turn into a stained ceiling in a matter of weeks. Our crews arrive with shoe covers at the door, drop cloths through the hallway, and a promise to leave your property as clean as we found it. Our technicians are background-checked and uniformed. We are part of the Cedarwell family of independently owned roofing businesses, and every repair is backed by our 365-Day Done Right Promise. For related work, see our general roof repair service.
What Our Flat Roof Repair Service Includes
Flat and low-slope roofs fail in different ways than shingle roofs, and the repair has to match the material underneath. Before we recommend anything, we identify what your roof is made of and why it failed. Here are the repairs we handle most often.
Membrane Patching
TPO, EPDM, and PVC membranes can puncture, blister, or split at the seams. We clean and dry the area, cut out the failed section if needed, and bond a new patch that overlaps the sound membrane on every side. For hot-applied or modified bitumen roofs, we use compatible torch-down or cold-applied patch material so the repair and the roof move together as temperatures change.
Seam Repair
Seams are the weakest line on most flat roofs. Heat, cold, and foot traffic slowly pull them apart, and the gap lets water get under the membrane. We lift the loose edge, clean both surfaces, and re-weld or re-bond the seam with the adhesive or heat method the manufacturer specifies for your membrane.
Ponding Water Correction
Standing water that stays for more than 48 hours after rain is a warning sign. It adds weight, speeds up membrane wear, and often points to a sagging deck or a blocked drain. We find the low spots, clear the drainage path, and where the roof allows it, build up the area with tapered material so water moves toward the drain instead of sitting.
Flashing and Edge Repair
Where the roof meets a parapet wall, a vent pipe, a skylight, or an HVAC curb, the flashing takes the abuse. Sealant dries out and metal edges pull loose. We replace failed flashing, re-seal terminations, and fasten coping and drip edges so wind-driven rain cannot get behind them.
Drain and Scupper Repair
A flat roof is only as good as its drains. Leaves, debris, and cracked drain bowls cause backups that push water under the membrane. We clear the line, replace damaged strainers and drain boots, and re-seal the membrane around each opening.
Coating and Resealing
When the membrane is sound but the surface is worn, a fluid-applied coating can add years of life. We clean, prime, and apply the coating in even coats, then check cure and coverage so there are no thin spots left behind.
What happens when you call
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A real person answersNo phone trees, you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Flat Roof Materials We Repair
Most flat and low-slope roofs in the country fall into a few families, and each one is repaired differently. We work on all of them.
TPO and PVC. These white single-ply membranes are heat-welded at the seams. A good repair uses the same welding method, not a coat of caulk. We test the weld with a probe before we call it finished.
EPDM. This black rubber membrane is common on older homes and small commercial buildings. It repairs well with the right primer and tape or liquid adhesive, but only when the surface is clean and dry, so we do not rush a patch in damp conditions.
Modified bitumen and built-up roofing. These layered asphalt systems crack and alligator with age. We cut out blistered areas, dry the layers underneath, and tie new plies into the old ones so the edges cannot lift.
Metal and coated systems. Low-slope metal panels leak at fasteners and laps. We replace worn fasteners, re-seal laps, and treat rust before it spreads. If you are weighing a bigger change, our metal roof installation page explains what that involves.
Signs You Need Flat Roof Repair Right Now
- Ponding Water: Puddles that are still there two days after rain mean the roof is not draining. The extra weight and constant moisture shorten the life of the membrane.
- Blisters or Bubbles: Raised pockets in the surface usually hold trapped moisture or air. Left alone, they split open and let water straight into the insulation below.
- Ceiling Stains: A yellow or brown ring on an interior ceiling means water has already passed through the roof system. Have the roof checked before the stain spreads or the drywall softens.
- Open Seams and Lifted Edges: If you can see daylight or a gap along a seam, or the edge metal is loose, wind and rain are working on it every day.
- Cracks and Alligatoring: A surface that looks like dried mud or reptile skin has lost its flexibility. It will not keep water out for much longer.
- Debris and Clogged Drains: Leaves and silt hold water against the membrane. If your drains are slow, a repair visit often costs less than the damage a backup causes.
Our Flat Roof Repair Process, Step by Step
1. Inspection and Consultation: We listen to what you have seen, then walk the roof and check the attic or ceiling below. We look at the membrane, seams, flashing, drains, and any soft spots in the deck. If you want a full report first, our roof inspection service covers the whole roof.
2. Written Quote: You get a clear price in dollars before we start. There are no hidden fees and no surprise change orders.
3. Site Protection: We lay drop cloths, wear shoe covers inside, and keep our materials staged out of your way.
4. Prep and Repair: We remove the failed material, dry and clean the area, and install the repair using the method that matches your membrane. We follow the Cedarwell Care Promise, which means we ask before we move anything and respect your quiet hours.
5. Cleanup and Documentation: We clear every scrap of debris, photograph the finished repair, and walk you through what we did before we leave.
How Much Does Flat Roof Repair Cost?
A typical residential flat roof repair falls between $400 and $1,500. A small membrane patch or a drain boot replacement sits near the low end. Seam re-welding over a long run, ponding correction, or repairs that expose wet insulation sit higher. Roof size, material, access, and local labor rates all move the number.
We believe in plain pricing. When we inspect your roof, you get a written estimate that separates materials from labor, and the quote is fixed once you approve it. If we find wet insulation or deck damage that changes the scope, we show it to you and get your approval before we do anything extra. Call (424) 766-4937 to schedule your free estimate and get a firm number.
Repair, Coating, or Replace?
Not every flat roof should be patched. A good rule is to look at how much of the roof is wet or failing. If the damage is limited to a few spots and the insulation underneath is dry, repair is almost always the smarter spend. If the membrane is past its service life, has been patched many times, or moisture readings show water spread across large areas, putting more money into patches can cost more than a new roof in the long run.
We will tell you which side of that line your roof is on, even when the answer is not the biggest job. If replacement is the honest recommendation, we explain why and show you what we found. You can read about the options on our roof installation page, or head to our home page to see everything we do.
Storm Damage and Emergency Leaks
Flat roofs take a hard hit from hail, high wind, and heavy snow load. A single storm can lift a seam, puncture the membrane, or clog a drain with debris. If water is coming in right now, call us. We can often advise you on temporary steps, like moving belongings and containing the drip, while we line up the repair. For larger weather events, see our storm damage roof repair page.
We do not promise same-day service on every job, but urgent leaks go to the front of the line.
Where We Work
Birchbark Roofing serves homeowners and building owners across the United States through our network of locally based crews. Whether your flat roof sits on a city rowhouse, a ranch addition, a garage, or a small commercial building, the same standards apply: a written quote, a careful crew, and a 365-day promise on the work. A live person answers our line around the clock, so you can reach us the moment you spot a problem.
Frequently Asked Questions About Flat Roof Repair
Most flat roof repairs are finished in one day. Small patches can take a couple of hours, while seam work over a long run or drain repairs take longer. We give you a timeline at the estimate so you know what to expect.
Most residential flat roof repairs run between $400 and $1,500, depending on the membrane, the size of the damaged area, and access. We give you a written price in dollars before work starts. Call (424) 766-4937 for a free estimate.
Most leaks can be repaired if the damage is local and the insulation below is dry. If the membrane is worn out or water has spread across large areas, replacement may cost less over time. We show you what we find and let you decide.
The most common causes are open seams, punctures, failed flashing, clogged drains, and ponding water. Age and sun exposure also make membranes brittle. We trace the leak to its true entry point, since water often travels before it shows up inside.
A live person answers our phones 24 hours a day, 7 days a week. We do not promise same-day service for every repair, but active leaks are prioritized so your home is secured as quickly as possible.
If the work we perform is not done right, we make it right. The promise covers every repair and replacement Birchbark Roofing completes for one full year.
Schedule Your Flat Roof Repair Today
If you have noticed ponding water, a stained ceiling, or a lifted seam, do not wait for the damage to spread. Birchbark Roofing offers free, written estimates and a 365-Day Done Right Promise on all work. Call (424) 766-4937 to speak with a live person and schedule your inspection.
Birchbark Roofing, repairing roofs across the United States since 2000.