How Long Does a Roof Replacement Take in NJ?

That is the direct answer. Below is the full picture: what happens hour by hour, what can slow things down, and what CRS does to keep your job on track.

How Long Does a Roof Replacement Take in NJ? By Size

What Happens on Roof Replacement Day

6:30 to 7:00 AM, crew arrives. Materials may have been delivered the prior afternoon. The crew lead does a quick walkthrough with you before work starts.

7:00 to 10:00 AM, tear-off. The old roofing comes off first. Shingles, underlayment, and any old ice and water shield are stripped and loaded into a dump trailer on your driveway. This is the loudest part of the day.

10:00 to 11:00 AM, deck inspection. With the old material off, CRS inspects the sheathing for rot, soft spots, and damaged boards. If repairs are needed, CRS documents them and addresses them before anything goes back on. You are notified before any additional deck repair begins.

11:00 AM to 1:00 PM, ice and water shield plus underlayment. Ice and water shield goes along all eaves (at least 24 inches up from the eave, per NJ code) and in all valleys. Synthetic underlayment covers the rest of the deck.

1:00 to 4:30 PM, shingles, flashing, and ridge. Shingles go on field by field. Step flashing is woven in at walls. Valley and chimney flashings are set. Ridge cap goes on last.

4:30 to 5:30 PM, cleanup and walkthrough. The crew runs a magnet over the lawn and driveway to collect nails, loads and removes all debris, and walks the property with you to show the completed work and answer questions.

What Can Extend a Roof Replacement

Deck damage. The most common reason a job runs into a second day. If CRS finds multiple boards or sections of sheathing that need replacement, that work adds time, and the full extent is not known until the old roofing is off.

Permit inspections (structural or multi-unit jobs only). A standard single-family re-roof in NJ needs no permit. Structural work, rooftop solar, and condo or multi-unit buildings do, and some towns require an inspection before the permit closes, which can add a day or two to closing out the permit (not to the installation itself).

Material delivery delays. Uncommon, but it happens during peak season or for specialty colors. CRS orders with buffer time to avoid it.

Weather. Rain, sustained winds above 25 mph, and temperatures below 40 degrees delay installation. The National Weather Service forecast drives the call.

What CRS Does to Minimize Disruption

CRS schedules most jobs for a Monday-to-Thursday start to leave buffer days at the end of the week for weather. For most standard homes, CRS aims to complete the job in a single day, arrives early, and runs a full crew. CRS does not leave a half-finished roof overnight unless a genuine weather or safety issue forces a pause, and if it does pause, the deck is secured with tarps before the crew leaves. The ice-and-water-shield and underlayment requirements that govern the install sequence are published by the NJ Division of Codes and Standards.

Last updated August 31, 2026. Written by the Certified Roofing Specialists Inc. team, licensed New Jersey roofing contractors serving Monmouth, Ocean, Middlesex, Somerset, and Union Counties.