Commercial roof replacement in New Jersey runs about $7.00 to $12.00 per square foot installed for single-ply membrane — EPDM at $7 to $10, TPO at $8 to $12, PVC at $6 to $12, and spray polyurethane foam at $4 to $8 — per Josten Roofing NJ.
New Jersey re-roof ranges sit 10 to 40% above national figures, and the membrane class, the tear-off scope, and the added insulation move the installed number within that band.
What Does a Commercial Re-Roof Cost per Square Foot?
A commercial re-roof runs about $7 to $12 per square foot installed for single-ply membrane. EPDM runs $7 to $10, TPO $8 to $12, PVC $6 to $12, and spray polyurethane foam $4 to $8, per Josten Roofing NJ pricing and commercial cost guides.
Single-ply membrane sets the core of the range, because EPDM, TPO, and PVC carry distinct material costs and service lives: EPDM lasts 15 to 25 years, TPO 7 to 20 years, and PVC 20 to 30 years, per the InterNACHI life-expectancy chart and Single Ply Roofing Industry guidance. The membrane class drives the per-square-foot number more than any other single line on the estimate.
Membrane class also positions PVC and spray polyurethane foam against the single-ply baseline: PVC at $6 to $12 resists rooftop grease and chemical exposure, per Duro-Last, while spray polyurethane foam at $4 to $8 adds R-6.0 to R-6.5 per inch of aged thermal value, per the Spray Polyurethane Foam Alliance and ASTM C1289. A modified-bitumen or built-up system replaces an alligator-cracked low-slope roof and lasts 20 and 30 years respectively, per the InterNACHI life-expectancy chart.
What Adds to the Installed Price?
Tear-off scope, deck repair, and tapered insulation add to the installed price beyond the membrane line. A water-soaked roof or one already carrying 2 or more layers requires complete removal under N.J.A.C. 5:23-6.4, which costs more than a like-for-like swap.
Tear-off and deck repair raise the number when the NJ Rehabilitation Subcode forces complete removal of the existing covering — on a water-soaked roof, a slate, clay, or cement-tile roof, or a roof already carrying 2 or more layers, per N.J.A.C. 5:23-6.4 — and the crew replaces deteriorated decking the old covering hid. A commercial replacement also carries a construction permit under N.J.A.C. 5:23-2.7, because the ordinary-maintenance exemption covers only the repair of up to 25% of the total roof area in a 12-month period, per the NJ Uniform Construction Code.
Tapered insulation adds rigid board built to at least ¼ inch per foot of slope, the drainage that clears the ponding water the NRCA and ARMA count as a defect after 48 hours. The tear-off exposes the deck once, the point at which insulation goes in at the lowest added labor, so a re-roof that corrects drainage carries more board than a flat like-for-like membrane swap.
Why Is NJ Higher, and Is Insulation Worth Adding?
New Jersey re-roof ranges sit 10 to 40% above national figures, and adding insulation during the tear-off captures the lowest added labor. Higher NJ labor rates and stricter NJ code lift the per-square-foot number above national averages, per Josten Roofing NJ.
New Jersey pricing carries the 10 to 40% premium because the state pairs higher labor cost with the N.J.A.C. 5:23-2.7 permit and the N.J.A.C. 5:23-6.4 complete-removal triggers a national average does not reflect, per Josten Roofing NJ and the NJ Uniform Construction Code. A re-roof that meets those code requirements prices above a recover-over that the Rehabilitation Subcode no longer permits on a water-soaked or 2-layer roof.
Adding insulation during the tear-off makes financial sense because the deck is open only once: rigid board and spray polyurethane foam at R-6.0 to R-6.5 per inch aged go in at the lowest added labor, per the Spray Polyurethane Foam Alliance and ASTM C1289, and white TPO and PVC reflect roughly 70 to 85% of solar radiation measured per ASTM C1549 and listed by the Cool Roof Rating Council. A commercial roof replacement carries no flat package price, so Newark Quality Roofing provides a free written estimate that prices the membrane, the tear-off, and the insulation for the roof.
Commercial roof replacement in New Jersey runs about $7 to $12 per square foot installed for single-ply membrane — EPDM $7 to $10, TPO $8 to $12, PVC $6 to $12, and spray polyurethane foam $4 to $8 — with NJ ranges 10 to 40% above national, and the tear-off scope, deck repair, and tapered insulation built to ¼ inch per foot moving the installed number within that band.