Flat Roof Repair
Flat and low-slope roof repair on Bergen County residential additions, dormers, porches, and bay extensions. TPO, EPDM, and modified bitumen membrane systems — seam repair, flashing, recoat, and replacement coordination.
Flat Roof Repair & Recoat
Residential flat roofs — on dormers, porches, bay extensions, garages, and additions — use different membrane systems than pitched roofs. TPO welded seams, EPDM rubber, and modified bitumen (rolled torch-down) each fail in different ways. The repair has to match the system. Generic patching often causes the next leak by trapping water between membrane layers.
- Membrane system identification (TPO, EPDM, modified bitumen) before repair
- Seam reseal on EPDM rubber and TPO welded seams
- Membrane patch repair sized to the actual damage zone
- Parapet wall flashing repair and termination bar inspection
- Drain bowl reflashing and clamping ring inspection
- Penetration reseal at vent stacks, condensate lines, and equipment curbs
- Liquid-applied roof coating for surface restoration on aged membranes
- Recommendation against repair where membrane is past serviceable life
- Coordination with full membrane replacement when needed
Flat roof systems are repaired by membrane-specific specialists. Commercial-scale flat roofs and large multifamily installations are outside our standard residential scope; we coordinate referral when warranted.
Serving Bergen County homeowners across Englewood, Tenafly, Fort Lee, Ridgewood, Paramus, Teaneck, Hackensack, Closter, Fair Lawn, and Bergenfield — plus every town in between.
Part of our Exterior & Envelope family. See also Roof Repair, Roof Shingle Replacement, and Gutter & Downspout Systems.
Flat Roof Repair Guides
Decisions that determine whether the flat-roof repair holds.
Crack Evaluation & Diagnosis
Hairline cosmetic, active leak, structural movement, or settlement — each gets a different repair. Width, pattern, and moisture all read together.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Epoxy Injection (Stable Cracks)
Two-part structural epoxy injected via surface ports bonds the concrete back together. Best for non-active hairline cracks.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Polyurethane Injection (Active Leaks)
Hydrophilic polyurethane expands when it contacts water, sealing active leaks. Different chemistry, different application than epoxy.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Carbon Fiber Reinforcement
Carbon-fiber strips bonded across the crack resist further movement. Used where structural assessment shows lateral pressure or settlement risk.
- Bergen County residential renovation experience across kitchens, bathrooms, basements, additions, and water-damage rebuilds.
- Written scope, sequenced milestones, and documented material selections before any demolition begins.
Planning a project like this? Get an estimate.
Drainage Root-Cause Resolution
Most foundation cracks are water-pressure related. Crack repair without drainage upgrade is a short-term fix. We coordinate both.
- 24/7 emergency intake; same-day or next-day response typical when crews and site conditions allow. Exact timing depends on weather, call volume, location, access, and crew availability.
- Industrial dehumidifiers and air movers sized to room volume and material type. Daily moisture readings until dry standard hit.
- Coordination with licensed plumbers, electricians, and adjusters on scope and documentation throughout.
Planning a project like this? Get an estimate.
Cost & Timeline Guide
Single epoxy injection $400–$900 in 2026. Polyurethane on active leak $700–$1,500 per crack. Carbon fiber strap $400–$800 each. Full drainage tie-in $4,000–$12,000+.
- Scope tiers, material grade, and labor splits drive total. Mid-range projects typically run 60–70% of high-end equivalents on the same footprint.
- Hidden costs to plan for: permit fees, dumpster, dust protection, and any required structural or trade work uncovered during demo.
- Bergen County projects budget 1–3% for permits and 5–10% contingency on most renovation scopes.
Planning a project like this? Get an estimate.
Your Project Process
Inspect & diagnose
Evaluate crack width, pattern, location, and whether water is present or seeping. Determine whether the crack is structural, cosmetic, or moisture-driven.
Select repair method
Recommend epoxy, polyurethane, carbon fiber reinforcement, or engineering coordination based on findings. We explain the options before anything is scheduled.
Prep & seal
Clean the crack, install injection ports where applicable, inject sealant, and apply surface seal. Carbon fiber straps installed where lateral pressure is a concern.
Waterproof & coordinate drainage
Apply waterproofing membrane over repaired sections. If water pressure from drainage is the root cause, coordinate French drain, sump pump, or yard drainage work.
Frequently Asked Questions
Depends on the membrane condition. If the system is under 12 years old and damage is localized, repair holds well. Past 15–18 years on EPDM or modified bitumen, multiple leaks usually signal end of service life and replacement is the more durable answer.
EPDM is black synthetic rubber, glued or mechanically attached. TPO is white welded thermoplastic, reflective and more energy-efficient. Modified bitumen is asphalt-based rolled material, torch-down or self-adhered. Each has its own repair method and lifespan.
No. Coatings are surface restoration, not leak repair. The leak source has to be fixed first (seam, flashing, penetration, or membrane damage). Coating then goes over a sound surface to extend service life.
Most spot repairs (seam, flashing, drain, single penetration) complete in 1–2 days. Full coating typically 1–2 days on residential-scale roofs. Membrane replacement runs 2–4 days for small to mid-sized residential flat roofs.
Yes. Bergen Restoration is a registered New Jersey Home Improvement Contractor (NJHIC# 13VH08865500) with commercial general liability and workers’ compensation coverage; documentation available on request.
Get Your Estimate
Tell us about your foundation crack or moisture concern. We’ll follow up with the next best step.
Commercial general liability and workers’ compensation coverage. Documentation available on request.
Let’s Talk About Your Project
Tell us what you have in mind — we’ll follow up with a plan.