Same symptom, different repair
An open TPO seam is not repaired like a split in APP modified bitumen or a failed detail buried beneath gravel. We identify the existing system before specifying materials.
Flat & low-slope roof repair
The repair has to match the roof you already have.
We diagnose and repair leaks in built-up, torch-down, self-adhered, TPO, PVC, EPDM and silicone-coated roofs. The material, attachment method, moisture and age of the surrounding roof determine what belongs in the repair—not a one-size-fits-all patch.
- TPO · PVC · EPDM
- Torch-down · Self-adhered
- BUR · Tar & gravel
- Silicone restoration
System-matched repairsTPO, PVC, EPDM, BUR and modified bitumen
Moisture diagnosisWe inspect beyond the visible opening
Real project proofDocumented built-up roof repair work
Honest recommendationsRepair, restore or replace by condition
Start with the roof—not the stain
A flat-roof leak is a symptom. The assembly tells us how to repair it.
A ceiling stain can be several feet from the entry point. Water may travel beneath the membrane, through insulation or along deck joints before it shows inside.
Trace the water path
We inspect laps, transitions, walls, curbs, pipes, scuppers, drains and the surrounding field—not only the spot directly above the interior damage.
Judge the roof around it
A focused repair makes sense when the adjacent roof can support it. Widespread moisture, repeated leaks or a worn-out system can change the honest recommendation.
Systems we service
Repair options for virtually every common flat roof.
Compatibility matters. The new membrane, adhesive, reinforcing and surfacing must work with the roof that remains in place.
Built-Up Roofing (BUR)
Asphalt and reinforcing plies, often surfaced with gravel. Repairs may require clearing aggregate, opening failed layers, replacing damaged material, reinforcing transitions and restoring the surfacing.
APP / SBS & Torch-Down
Localized repairs can use compatible base, smooth and cap materials, installed by an appropriate torch-applied, cold-process or other approved method for the existing assembly.
Self-Adhered & Cold Process
Multi-ply repairs can be built with self-adhered membranes or cold-process adhesives where those materials and application methods fit the roof and site conditions.
TPO & PVC
Open seams, punctures and failed details may be cleaned, prepared and repaired with compatible membrane and heat-welded patches after moisture and substrate conditions are checked.
EPDM
EPDM requires system-compatible cleaners, primers, cover tape, uncured flashing or membrane patches. Generic roof cement is not a substitute for a compatible detail.
Silicone-Coated Roofs
Details and damaged coating can often be cleaned, reinforced and recoated. A broader restoration may be considered only when the existing roof is dry, sound and compatible.
Where flat roofs leak
Most leaks begin at a transition, opening or stressed detail.
The roof field matters, but penetrations and drainage details receive movement, water and service traffic that can accelerate failure.
Seams, laps & splits
Open welds, fishmouths, wrinkles, punctures and membrane movement can create a direct path beneath the roof.
Drains & scuppers
Loose clamping rings, failed tie-ins, blocked flow and deteriorated sealant can keep water at the most vulnerable point.
Pipes, curbs & penetrations
HVAC curbs, pipe flashings, pitch pockets, supports and conduits all interrupt the waterproofing plane.
Walls, parapets & edges
Terminations, counterflashing, edge metal and wall transitions move differently than the roof field and need durable tie-ins.
Wet insulation or deck
Trapped moisture and soft substrate can spread beyond the visible opening. Unsound material must be addressed before it is covered.
Traffic & rooftop equipment
Solar work, HVAC service and repeated foot traffic can puncture or stress the roof around busy access paths and equipment zones.
From a real Zenith job
Two active leak areas on an older built-up roof.
Rain was in the forecast and the property wanted a focused repair. We traced the problem areas, opened the existing assembly, rebuilt the repair zones and tied them into the surrounding BUR system.
What this job shows: a tar-and-gravel repair is more than smearing mastic over the surface. The gravel and failed layers have to be moved, the repair has to reach sound material, and the perimeter has to be reinforced before compatible surfacing is restored.
The method follows the system
Several ways to make a durable flat-roof repair.
The right choice comes from field conditions—not from forcing one product onto every roof.
Membrane patch or seam repair
For compatible TPO, PVC or EPDM, the area is cleaned and prepared before a system-specific patch, seam or flashing repair is installed.
Base, ply and cap repair
A torch-down opening may be rebuilt with compatible base material, a smooth or intermediate ply and an APP cap sheet, depending on the existing assembly.
Self-adhered or cold process
Self-adhered membranes and cold-process adhesives can build a compatible multi-ply repair where site conditions or the roof system favor those methods.
Three-course reinforcement
Roofing cement with embedded fiberglass reinforcing fabric and a protective top layer can strengthen compatible BUR and modified-bitumen transitions and details.
Drain or scupper rebuild
Localized work may include opening the surrounding roof, correcting the tie-in, resealing or replacing components and restoring positive drainage where feasible.
Silicone detail or coating work
On a suitable dry roof, silicone can simplify restoration around extensive solar, HVAC and electrical equipment—but coating is not a cure for trapped moisture.
Repair, restore or replace?
We explain what the repair can—and cannot—do.
A repair can be the right investment, a practical bridge or poor value. The difference is the condition of the roof around the leak.
Spot or detail repair
Best fit for a localized puncture, seam, pipe, curb, drain or scupper when the nearby roof is dry and serviceable.
Sectional opening
Used when the water path or damaged material extends beyond a small surface detail and a larger area must be rebuilt.
Recovery or restoration
May fit a compatible roof with sound, dry substrate—especially where a crowded equipment layout makes tear-off disruptive.
Replacement
Often the stronger value when wet insulation, widespread deterioration, repeated leaks or end-of-life materials are no longer localized.
An honest note about old BUR roofs
Sometimes a patch is an expensive Band-Aid.
Tar-and-gravel roofs can be repaired, but an isolated repair does not renew the surrounding aged roof. If the system is brittle, saturated or leaking in several areas, we will tell you before you spend money expecting a new-roof result.
- The proposed repair scope is limited to the areas we work on.
- Adjacent old roofing can develop a separate leak later.
- We discuss those limits and the applicable workmanship coverage before work begins.
Not sure whether your flat roof is worth repairing?
We can inspect the system, isolate the likely entry point and show you whether a focused repair, broader restoration or replacement is the more responsible next step.
Straight answers
Flat roof repair FAQ
Every assembly is different, but these are the questions we answer most often before a repair.
What types of flat roofs do you repair?
We repair built-up and tar-and-gravel roofs, APP and SBS modified bitumen, torch-down and self-adhered systems, TPO, PVC, EPDM and compatible silicone-coated roofs. We first identify the existing system so the repair materials and method match it.
Can you repair a tar-and-gravel roof?
Sometimes. A localized repair can be reasonable when the surrounding built-up roof is still serviceable. On a very old, brittle or broadly deteriorated roof, the same repair may only be a temporary and relatively expensive bridge. We will explain that distinction before work begins.
Why can the ceiling stain be far from the roof leak?
Water can travel beneath roofing layers, through insulation, along deck joints or with the roof slope before it appears inside. We inspect likely entry points and transitions rather than assuming the stain marks the exact opening.
Can you repair scuppers, drains, pipes and HVAC curbs?
Yes. These are common leak points. A focused repair may involve opening the surrounding membrane, rebuilding the tie-in, reinforcing or replacing flashing materials, resealing components and restoring drainage.
When does silicone coating make sense?
A compatible silicone restoration may make sense when the existing roof is dry and serviceable, particularly on a busy roof with solar panels, HVAC equipment and extensive electrical conduit. It is not a shortcut over wet insulation or unsound roofing.
Can you repair a flat roof around solar panels and equipment?
Often, yes. Access, penetrations, equipment supports and service paths all affect the scope. We assess whether a spot repair is practical or whether a compatible coating or larger sectional repair provides better continuity.
How long will a flat roof repair last?
There is no responsible one-number answer. Service life depends on the system, moisture, attachment, drainage, age and condition of the surrounding roof, and whether the leak is truly localized. We explain the likely limitations with the proposed scope.
Local flat-roof service
Serving San Diego County and Southwest Riverside County.
Based in Escondido, with repair service throughout North County, greater San Diego and the Temecula Valley.
- Escondido
- San Diego
- San Marcos
- Vista
- Oceanside
- Carlsbad
- Encinitas
- Poway
- Fallbrook
- Temecula
- Murrieta
- Menifee
Secure estimate request
Tell us what is happening with your flat roof.
Share the property address, roof system if known, where you noticed the leak and whether rooftop equipment or solar is nearby. Photos help us understand the existing conditions before we contact you.
Show us the leak. We’ll identify the roof and explain the right repair.
Flat-roof leak diagnosis and repair from Zenith Roofing Services.