Overhead view of a fully stripped roof covered in synthetic underlayment, with around twenty shingle bundles staged in a row along the ridge and tarps below catching the torn off shingles
Mercer County, NJ

Roof replacement in Mercer County, NJ

Trenton's median house went up in 1953, and many of them share a wall and a roof line with the next one. West Windsor's dates to 1990, and plenty of those houses still have the shingles they were built with. We strip either one to the deck and show you what is under it.

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Modern Home Roofing & Chimney replaces roofs across Mercer County, NJ, from rowhouses in Trenton and older houses in Hopewell Borough to 1990s homes in West Windsor and Robbinsville. Every layer comes off, and you see photos of any rotted wood first. On an attached house, the job goes through the town's construction office. NJ HIC 13VH13268400.

Mercer County roofs

Rowhouse roofs in the city, first roofs in the townships

1953Median year a Trenton house was built. New Jersey: 1971.
38%Of Trenton homes built before 1940. New Jersey: 17%.
1992Median year a Robbinsville house was built. West Windsor's: 1990.
19%Townhouses and other attached houses across the county. New Jersey: 10%.

In Trenton, 43 percent of homes are attached houses, and only 16 percent stand by themselves. Many of those roofs run straight into the roof next door. On a house that old there may be two layers of shingles, and under them, board decking instead of plywood.

Attached houses are not only a city thing here. Robbinsville's median house dates to 1992, and 27 percent of its homes are attached. East Windsor is at 23 percent. Countywide it is about one home in five, roughly twice the state share. New Jersey's permit exemption for a new roof covers only detached one- and two-family houses, so these roofs go through the town's construction office, and many of them belong to an association.

Plenty of houses from the late 1980s and 1990s are on their original roof, and shingles that old are often close to done. Summer is part of the reason. Central New Jersey sees 15 to 20 days a year above 90 degrees, and a dark roof in full sun gets far hotter than the air around it.

So a Mercer County roof gets priced from on top of it. We go up when it is safe to, count the layers, check the attic, and look at where your roof meets the next one.

Before the estimate

What we look at before we price a Mercer County roof

Two houses the same size can price far apart here. One has two layers over old boards and a seam with the neighbor. The other has one layer over plywood. We find out which one you have before you see a number.

Roofer laying the first courses of new shingles over synthetic underlayment while two crew members work further along the roof

On a Mercer County house, we check

  • On a Trenton rowhouse, the seam where your roof meets the next one, and the flashing along it.
  • How many layers are on the roof. Each one comes off.
  • Whether the deck is plywood or old boards, and whether it gives where the nails go in.
  • On a 1990s roof in West Windsor or Robbinsville, bare spots, curled edges and granules in the gutter.
  • The attic, for stained wood, damp insulation and daylight.
  • The brick chimney, and the joint between it and the roof.
Roofer nailing down a patched section of a shingle roof, with the old shingles cut back around the repair and a roll of underlayment beside it

A worn spot is not always a worn out roof. If a repair will hold for now, that is the price we give you. Roof repair in Mercer County

Could a repair do it?Book a free inspection
City and township

Older roofs in Trenton and the boroughs, first roofs in the townships

Roof stripped to new plywood decking with a continuous slot cut along the ridge and crew members working near the peak
Trenton, Hightstown, Hopewell Borough

The older houses

Trenton's median house dates to 1953, Hightstown's to 1950 and Hopewell Borough's to 1938. A roof that old has usually been replaced at least once, and an earlier crew may have nailed new shingles over the old ones. In Trenton, where most houses are attached, the new roof goes through the town's construction office and has to tie into the roof next door.

Hand at the ridge of a shingle roof lifting a bundle of loose low voltage wires that run across the shingles beside a vent
West Windsor, Robbinsville, East Windsor

The newer townships

The medians are 1990 in West Windsor and 1992 in Robbinsville, and close to a third of West Windsor's homes went up this century. Most of these roofs are one layer over plywood, and the question is whether the original shingles are done. A townhouse roof here often belongs to the association, and an attached one goes through the construction office, so we sort that out before the estimate.

If the gutters are tired too, a new roof is a sensible time to replace them. Gutter installation

How it works

How a roof replacement works in Mercer County

Most houses take one or two days once work starts, weather permitting. All seven steps are on the roof replacement page.

  1. Free inspection

    We get on the roof when it is safe to, check the attic and take photos. You see them before we talk about price.

  2. Written estimate

    Scope, materials, number of days and the price, on paper. Any permit goes on it too.

  3. Tear off and deck check

    Every layer comes off down to the wood. If we find rotted boards, we stop and show you before we replace them.

  4. New roof and clean up

    New underlayment and shingles go on. Then we haul the old roof away and run a magnet over the lawn and driveway for nails.

Skylight set into an asphalt shingle roof with metal flashing around the frame and a stone chimney behind it
Low slope roof covered in black membrane, with a skylight set into it and rolls of membrane laid out
Aerial view of a completed architectural shingle roof on a two storey house
Crew member standing on a finished shingle roof with a ladder set to the ridge, surrounded by neighbouring houses and driveways

Do you need a permit for a new roof in Mercer County?

On a detached one- or two-family house, no. New Jersey's construction code treats a new roof covering on a detached one- or two-family house as ordinary maintenance, so there is no permit and no notice to the town. A townhouse or other attached house usually goes through the town's construction office. Princeton has historic districts, where exterior work needs a preservation plan, though replacing a worn feature with the same material, color and size counts as ordinary maintenance. We check with your town before we start, and any permit goes on the estimate.

Before you hire anyone

What you can check on us first

  • Our New Jersey Home Improvement Contractor license is 13VH13268400. Look it up with the Division of Consumer Affairs.
  • We carry insurance and can send you the certificate before work starts.
  • The inspection is free, and the estimate comes to you in writing.
  • We are open 24 hours.

GAFOn roofing work, we are also GAF Certified. What GAF Certified means

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FAQ

Roof replacement questions in Mercer County

Still not covered? Call 732-682-9251 and ask.

If it is in Mercer County, yes. We cover all 12 municipalities, from East Windsor to West Windsor. Put your ZIP code in the estimate form and we confirm it when we call you back.

It turns on the size and pitch of the roof, how many layers come off, how much decking is bad, the shingle you choose and, on an attached house, the permit. A single layer in Robbinsville and two layers over boards in Trenton are not the same job. We do not quote over the phone. You get a written price after the inspection.

Not on a detached one- or two-family house, where no construction permit is needed. The state counts a new roof covering there as ordinary maintenance. A rowhouse, a townhouse or a building with three or more units goes through the town's construction office, and in Trenton that covers most houses. We find out what your town wants first, and the permit is listed on the estimate.

We strip your side up to the shared wall and tie the new roof in so water sheds off instead of running down between the houses. Your neighbor's roof stays as it is unless they hire us too. If their side looks like trouble, you get the photos.

Maybe. A house from the late 1980s or 1990s may still have its first roof, and shingles that age are often close to worn out. We get up there, photograph the tabs and the ridge, and tell you straight if a repair buys you more time.

Yes. Princeton has historic districts, where exterior work needs a preservation plan, though replacing a worn feature with the same material, color and size counts as ordinary maintenance. We check with Princeton before we start, and anything it needs goes on the estimate.

Call us, but check with your association first. In most condos the roof and the siding belong to the association, and the board hires the contractor. Townhouses vary. Your association documents say who owns what.

Aerial view of a roof replacement near completion, with crew members setting the final courses

Find out which kind of roof job you have

Tell us your town and what kind of house you live in. We call you back shortly, and the roof inspection costs nothing. You get the photos and a written price, and if the roof has more life in it, we say so.

Or call 732-682-9251

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