Flat roof repair in New Jersey runs about $400 to $2,500 for most leaks in 2026. Call (201) 676-3099 or book a free estimate.
Flat roof repair in New Jersey runs about $400 to $2,500 for most leaks in 2026. The price depends on the material, how much water got in, and whether the leak is one seam or a whole low spot that has been holding water for years. Flat roofs are common on North Jersey two-family homes, additions, garages and storefronts, and they fail in predictable places.
2026 flat roof repair prices in NJ
| Repair | Typical price |
|---|---|
| Find and seal one seam or flashing leak (EPDM or TPO) | $400 – $900 |
| Patch a puncture or split, up to 2 sq ft | $350 – $750 |
| Re-flash a drain, pipe or HVAC curb | $450 – $1,200 |
| Fix ponding: add tapered insulation or a cricket | $1,200 – $4,500 |
| Replace wet insulation and deck in one area | $1,500 – $5,000 |
| Full recoat (silicone or acrylic), per 1,000 sq ft | $2,500 – $5,500 |
| Full replacement, EPDM or TPO, per 1,000 sq ft | $7,000 – $14,000 |
Where flat roofs leak in New Jersey
- Seams that opened in the freeze-thaw cycle
- Around the drain and scupper, where leaves pile up
- At the wall where the flat roof meets the house: the flashing pulled away
- Under the AC unit or satellite mount someone screwed through the membrane
- Low spots holding water for more than 48 hours after rain (ponding)
- Old modified bitumen that has gone brittle and cracked at the edges
Repair, recoat or replace?
Repair if the roof is under 15 years old, the deck is dry and the leak is in one place. Recoat if the membrane is sound but chalky and you have several small issues; a coating buys 8 to 12 years for a third of replacement cost. Replace if you have ponding across large areas, wet insulation you can feel underfoot, or more than three leaks in two years. We tell you which one in writing after a moisture check, and we do not sell a replacement to fix one seam.
Emergency flat roof leaks
A flat roof leak in a storm can dump a lot of water fast. We do same-day temporary seals and tarping across North Jersey, then price the permanent repair for daylight. Call the 24/7 line.
Questions people ask next
How long does a flat roof last in NJ?
EPDM rubber 20 to 25 years, TPO 20 to 30, modified bitumen 15 to 20. Ponding water and clogged drains shorten all of them.
Can a flat roof be repaired in winter?
Yes, on dry days above about 40°F. Some sealants and TPO welds need warmer temperatures, so winter fixes may be temporary until spring.
Why does my flat roof hold water?
The roof was built without enough pitch, or the insulation has settled. The fix is tapered insulation or a cricket that steers water to the drain.
Do you repair flat roofs on commercial buildings?
Yes, storefronts, small offices and multi-family buildings across New Jersey.
Need roof repair near you?
If you searched “roof repair near me” anywhere in New Jersey, that's us. First Call Contracting is based in Paramus and sends its own licensed crew to all 21 counties — written price before work starts, no deposit, a real person on the phone 24/7.
Flat roof leaking?
Text a photo of the ceiling stain and the roof. We tell you whether it is a seam, a drain or the whole roof, and what it costs to fix.
Or call Alex direct: (201) 676-3099