New Jersey does not issue a general contractor license, so vetting roofing contractors in NJ starts with a registration number instead. William Penn Roofing & Exteriors carries NJ-13VH12052900, filed with the Division of Consumer Affairs and verifiable in seconds.
We have handled roof repairs, replacements, inspections, and storm damage across New Jersey since 2008, working out of Bucks County and over the Delaware, from Hunterdon County down to the Cape May shore. Same roofers, same GAF and Owens Corning systems, same 120+ five-star reviews on both sides of the river.
Tell us what your roof is doing and we will come look at it.
A roof rarely fails all at once. One lifted shingle or one length of separated flashing lets water in, and the roof looks the same from the street for months while the decking underneath does not.
Ice damming is the version most New Jersey homeowners meet. Snowmelt refreezes at the eave, backs up under the shingles, and turns into a February ceiling stain. That failure is usually ventilation and drainage, not shingles, which is why we check attic airflow before quoting anyone in Short Hills or Bridgewater a new roof they may not need.
Catch it at the flashing and it is a repair. Catch it at the ceiling and the decking and insulation are already part of the job.
Tear-offs, decking repairs, full replacements, and siding work across the counties we serve. Steep pitches, original slate and cedar, dormers, and complicated valleys take longer and cost more than a simple gable, so we price Princeton, Hamilton Township, Moorestown, and Haddonfield roofs off what is actually up there.
The before-and-after gallery shows what these roofs looked like when we arrived.
Our residential roofing work covers everything from a single leak to a full system replacement.
We get on the roof and into the attic. Most leaks trace back to flashing, valleys, or penetrations rather than the field of the roof, and you get a written condition report instead of a verbal opinion from the driveway.
Lifted or missing shingles, failed pipe boots, separated flashing, and valley leaks. If a repair genuinely solves the problem we will tell you, even when a replacement would be the bigger invoice.
Full tear-off down to the decking, so anything rotted gets found and replaced rather than covered. Ice and water shield at the eaves and valleys, proper ventilation, and a manufacturer-approved system from the underlayment up.
Active water gets tarped first and diagnosed second. Shore homes around Avalon take the worst of it, where wind uplift and salt-corroded fasteners fail together. You get a scoped storm damage report with photos and the storm date, ready for your adjuster.
Low-slope roofs fail differently than pitched ones, usually at seams and drains rather than shingles. Our commercial roofing team in New Jersey works on offices, warehouses, storefronts, and the rear additions on older homes.
Seam separation, ponding water, failed drains, and flashing at curbs and parapets. We work around your operating hours where we can.
TPO, EPDM, or modified bitumen selected on building use and drainage rather than on price alone. Downtown storefront buildings in places like Somerville often sit on decades of layered roofing that needs to come off first.
For roofs with life left in them, a coating restores the membrane and buys years without the cost and disruption of a tear-off.
Material choice in New Jersey is a question of exposure, not preference. What holds up on a barrier island is the wrong answer forty miles inland.
Architectural asphalt covers most New Jersey homes: strong wind ratings, long warranty, fair price. On shore-facing roofs we upgrade to an enhanced nailing pattern and a higher wind-rated line.
Standing seam sheds snow and wind-driven rain better than any shingle. Compared to shingles it costs more upfront and lasts decades longer.
Cedar shake suits older homes where the roofline is part of the architecture. It needs more upkeep than most owners expect in a freeze and thaw climate.
Copper works best as an accent: bay windows, porch roofs, dormers, and valleys. On homes around Martinsville and Green Knoll it is often original and worth restoring.
Real slate lasts a century and weighs enough that the framing has to be rated for it. Synthetic slate gives you the profile at a fraction of the weight.
A white reflective membrane that keeps heat out, suited to large commercial roofs and rooftop equipment. Heat-welded seams hold up where ponding is a risk.
EPDM stays flexible through the freeze and thaw cycles that split rigid materials. It absorbs heat rather than reflecting it, so it fits shaded and smaller roofs.
Modified bitumen handles foot traffic better than single-ply, which matters on roofs with service access. Common on rear additions, porch roofs, and garage sections.
Water leaves your roof and immediately becomes something else’s problem. Handling both under one contract means nobody points at another trade when it goes wrong.
Undersized or sagging runs are a leading cause of ice damming and foundation moisture. Sizing seamless gutters to the roof area feeding them is what actually moves water away.
Handled alongside the roof, the transition at the roofline gets flashed properly instead of patched around by two crews. That is the main reason to replace siding and roofing together.
Leaks here start at the flashing, not the glass. We install and reflash VELUX units as part of the roof system, including foggy or failed glass on a sound roof.
Trapped moisture behind the surface causes structural damage that patching will not stop. Full remediation corrects the cause and restores the drainage plane behind it.
A sealed exterior is only as good as its openings. Coordinating window and door replacement with roofing and siding keeps every penetration detailed by one team.
We install GAF, Owens Corning, and CertainTeed roofing systems, VELUX skylights, and James Hardie siding. Certification means the work is done to a specification the manufacturer will stand behind.
That is what separates a workmanship warranty from a system warranty. Only one of them survives a contractor going out of business.
We are based in Pennsylvania, and New Jersey does not license general contractors. Registration is the credential that matters here, so start there with any roofer you call.
Registered and verifiable. NJ-13VH12052900. The Division of Consumer Affairs portal shows status, expiration, and any disciplinary history, and the state requires $500,000 in liability plus workers' compensation before issuing that number.
Closer than most of your options. Our yard sits minutes from the Delaware crossings, so crews reach Lambertville, Stockton, and Frenchtown faster than roofers driving down from the northern half of the state.
Everything in writing. New Jersey requires a written home improvement contract with the scope, total price, and dates spelled out. Verbal change orders are where disputes start.
One team for the whole exterior. Roof, gutters, siding, stucco, and windows on a single contract with a single point of accountability.
Reviews that name the crew. Google Guaranteed status and 120+ five-star ratings, with customer testimonials you can read before you call.
Usually not. Under the state Uniform Construction Code, replacing roof covering on a detached one or two family home counts as ordinary maintenance. Replacing sheathing or rafters does require one, and we confirm with your township before scheduling.
We stop, photograph it, and show you before replacing anything. Decking is priced per sheet in your proposal, so the number is known in advance.
Late spring through October, because asphalt shingles need warmth to seal properly. Winter installs are possible with hand-sealing, and emergency work happens year-round.
Wind damage is typically covered, general wear is not, and documentation decides which one your claim looks like. You get a scoped report your adjuster can work from.
Faster in the counties nearest the river, and we are honest about that. If water is actively coming in, say so when you call and it moves to the front of the queue.
William Penn Roofing & Exteriors consists of New Jersey’s most skilled and experienced roofers. Every team member is fully licensed and possesses the necessary tools and knowledge to complete any roofing project, no matter the size.
Water that gets past your roof does not stop at the ceiling. It finds insulation, framing, and drywall, and the bill grows every week the roof stays open.
Tell us what you are seeing and we will come look at it. The inspection and the written estimate cost you nothing.
