What we fix
Brooklyn's housing stock is dominated by flat-roofed brownstones, multi-family walkups, and prewar mixed-use buildings. The roof systems on these buildings fail in predictable ways — and almost all of them are repairable without a full replacement, if you catch them early.
- Active leaks — we trace where water is actually entering, which is rarely where the ceiling stain appears. Most leaks chase a path along framing or insulation before showing up several feet from the failure point.
- Membrane punctures, tears, and seam separations — foot traffic, dropped tools, and HVAC service vendors are the usual suspects. Heat-welded patches restore the membrane.
- Ponding water — if water sits on your roof more than 48 hours after a storm, drainage is failing. Tapered insulation or new drains correct it.
- Failing flashings — parapet walls, chimneys, skylights, vent pipes, and bulkheads are the leak-prone interfaces. Most flat roof leaks originate at flashings, not in the field of the membrane.
- Blisters and surface damage — modified bitumen and built-up roofs develop blisters that can be cut, dried, and reflashed before they propagate.
- Drain failures — clogged or damaged drains cause every other problem on this list. We pull them, clear them, reseat them, and replace strainers.
Need it handled now?
Free estimates within 48 hours. Emergency response in 4–8 hours, depending on your location and how busy we are.
The membrane systems we work with
Brooklyn flat roofs are built on three or four common membrane systems. Each has a different repair approach. Specifying the right one matters.
TPO (Thermoplastic Polyolefin)
White reflective single-ply, heat-welded seams. Lower cooling costs and qualifies for cool-roof rebates. Repaired with hot-air weld patches. Typical lifespan 18-25 years.
EPDM (Ethylene Propylene Diene Monomer)
Black rubber membrane, adhered seams. Excellent in cold climates. Repaired with EPDM patch and seam tape. Common on Brooklyn commercial buildings. 20-25 year lifespan.
Modified Bitumen
Multi-ply asphalt-based system, torch-down or self-adhered. Common on older brownstones. Repaired with modified-bit patches and reflashing. 20-25 year lifespan.
Built-Up Roofing (BUR)
Traditional tar-and-gravel system. Common on prewar Brooklyn commercial. Repaired with hot-mopped patches or modified-bit overlay. 25-30 year lifespan with maintenance.
How we diagnose, then fix
Inspection & leak trace
We walk the roof, photograph the membrane, identify failure points, and trace the water path back to its source. Most leaks aren't where you think they are.
Written diagnosis
We give you the diagnosis in writing — what failed, why, and what the repair scope is. If the roof needs replacement instead of repair, we tell you. We don't sell replacements when repairs work.
Fixed-price quote
The quote covers materials, labor, debris removal, and any required permits. No "discovered conditions" surprises later unless we genuinely uncover hidden deck damage during the work — and if we do, we stop and call you before proceeding.
Repair & verification
We perform the repair, document it photographically, and water-test where appropriate. You get a 5-year workmanship warranty on repair work.
What flat roof repair costs in Brooklyn
Real ranges for 2026:
| Repair scope | Typical range | Notes |
|---|---|---|
| Single-leak diagnosis & patch | $450 – $1,200 | Most common service call |
| Multiple seam repairs / re-flashings | $1,200 – $3,500 | Several failure points addressed at once |
| Drain repair / replacement | $650 – $1,800 | Per drain, including re-flashing |
| Parapet wall coping & flashing | $2,500 – $7,500 | Linear-foot pricing varies |
| Roof coating (extends life 10-15 yrs) | $2.50 – $4.50 / sq ft | Silicone or acrylic; whole-roof |
| Emergency tarping | $650 – $1,500 | Stabilization only; permanent repair quoted separately |
Pricing is directional. Actual quotes depend on access, building height, scaffolding requirements, and the specific membrane system. Every roof is different; every quote follows a real site walk.
When repair makes sense — and when it doesn't
Repair, when: the membrane is mostly intact, the deck is sound, the roof is under 15 years old, and the failure points are localized.
Replacement, when: the membrane has multiple failures, the insulation is saturated, the deck shows rot, the roof is over 20 years old, or you're patching the same spot repeatedly. Patching a roof that's failed structurally is throwing money at a problem that's only getting worse. We tell you when you've crossed that line.
If replacement is the right call, see flat roof replacement for system options and pricing.