Most people start looking for roofing contractors in Ambler, PA the week something goes wrong: a stain spreading across a bedroom ceiling, shingles in the yard after a storm, or a slate roof that has been quietly failing for years. William Penn Roofing & Exteriors has handled all three across Montgomery County since 2008.
The borough’s housing stock runs from pre-1930 slate Victorians on Mattison Avenue to attached twins on the narrow streets off Butler Avenue to low-slope membrane over the storefronts downtown. Each fails differently, so every estimate starts on the roof rather than from a price sheet.
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G AldridgeTrustindex verifies that the original source of the review is Google.
Amazing beyond our expectations. Project Specialist, Kim was very professional, great follow through and knowledgeable. He took his time to thoroughly explain the new roof installation process and proposal. The on-site project manager, Will kept us updated throughout the project and his crew were punctual and finished on time. Great clean up after job completion. Also, the office manager, Ashley was responsive and very accommodating. Highly recommend.Posted on Google![]()
Megan LynchTrustindex verifies that the original source of the review is Google.
Dave with WPR replaced the roof on our sunroom as well as siding and trim on the front of our house. His crew arrived on time, were professional & cleaned up after they finished. My husband & I are extremely happy with the finished product. We would recommend WPR to anyone needing roofing, trim, siding or gutters. You can trust this company.Posted on Google![]()
Ian SmithTrustindex verifies that the original source of the review is Google.
I had the pleasure of working with the owner David of William Penn Roofing. He was very helpful with making all of the tough choices with having so many options. The work was completed on time, even in the bad weather. They were very thorough in their cleanup as well. I would highly recommend them for any of your roofing or siding needs! Even there show van as all of the options inside so you can see them in person.Posted on Google![]()
MikeTrustindex verifies that the original source of the review is Google.
I had roof damage from high winds and reached out for help. Dave responded quickly, arrived promptly, and thoroughly inspected the roof. He identified that the damage was isolated to one area and was able to repair it on the spot. His professionalism, efficiency, and attention to detail were outstanding. I truly appreciated his quick response and quality workmanship. Highly recommend his services to anyone in need of a reliable and skilled roofer!Posted on Google![]()
Rich GleesonTrustindex verifies that the original source of the review is Google.
Did my roof and banged it out in a single day. Super professional and great communication on the process and timing. Would recommend and use again.Posted on Google![]()
Jethro PepeTrustindex verifies that the original source of the review is Google.
We recently had William Penn Roofing replace our roof and they did an incredible job from top to bottom. The representative, Kim, did a great job of getting our quote and presenting options to us. The roofing team did a superb 1-day job and cleaned up our yard well. The project manager on the job was there the whole time to answer our questions also! I highly recommend.Posted on Google![]()
Sven HedbergTrustindex verifies that the original source of the review is Google.
Our roof replacement on 274 East Court Street, Doylestown, was expertly done by William Penn Roofing with a minimum of disturbance to neighbors and traffic. David La Salle’s initial inspection of the failing roof was thorough and quickly followed by a quote. Scheduling and execution were efficient and communication between crew, tenants, neighbors and owners courteous and effective, avoiding all misunderstandings. Supervisors and crew were very professional and friendly and they thoroughly cleaned the job site, side walk and street after completing the job. It is a pleasure to recommend William Penn Roofing, based on quality of work, cost and work crew performance.Posted on Google![]()
Joe ETrustindex verifies that the original source of the review is Google.
William Penn Roofing did great work on our new roof. Thorough and accurate estimate and scheduled quickly. Roof looks great and they were in and out (and cleaned up) in a day. Whole team was a pleasure to work with. Highly recommend.Posted on Google![]()
Elyse GerwickTrustindex verifies that the original source of the review is Google.
Really great experience the whole way through with this company. They are excellent with communication, returning calls/emails. Ashley got everything all setup. On the first visit, Kim was very thorough, explaining the whole process, and he had everything with him to be able to show us what we'd be buying (gutter size options, roof colors, and the vents). There was even a folder he left with me with literature and samples I could share with my husband. When the roofers came out they were polite, tidyand did an excellent job with cleanup. It's been 10 days and we have not found a single piece of roofing remnants. The gutters were installed the following day, we opted for 6 inch gutters and downspouts with the gutter guards and couldn't be happier. Again, very professional team and impeccable cleanup. I'd absolutely recommend going with this company for your project and hope to work with them again when we need future work on the house.Posted on Google![]()
Patricia KohlheppTrustindex verifies that the original source of the review is Google.
William Penn Roofing came to give me a complete inspection of my roof. He explained in detail everything about the roofing from the attic area to the outside. Extremely helpful!
Our residential roofing work in the borough runs from a single leak diagnosis to a full tear-off on a steep Victorian with three planes and two chimneys. The same range we handle on the larger wooded lots over in Dresher.

We check the shingle plane, flashing, chimney tie-ins, vent boots, edge metal, and ventilation, then the attic where there is access. You leave knowing where the water is entering, with photos.

Lifted shingles, failed pipe boots, torn valley metal, and flashing pulling away from masonry are the repairs we make most often on older borough homes. Caught early, they stay out of the decking.

Tear-off to the deck, soft sheathing replaced, synthetic underlayment, ice and water membrane at eaves and valleys, and every flashing detail rebuilt rather than reused. Nothing gets covered over.

We tarp first and diagnose second so the house stops taking on water. Storm damage becomes a repair or an insurance claim, documented with photos either way. The same crews cover Fort Washington, so nothing waits.
You are already here because something looked wrong. What it usually turns out to be:
Most commercial roofing around the borough is low-slope membrane over brick: Butler Avenue storefronts with apartments above, converted industrial space near the old Boiler House, and flex buildings along the Route 309 corridor toward Horsham.

Seam separation, punctures, standing water at drains, and leaks at curbs and penetrations. Targeted repair restores a watertight membrane without committing to a replacement before the roof has earned one.
When annual repair costs stop making sense, we plan the tear-off around your operating hours, tenants, and access. On Butler Avenue that usually means working around limited curb space and steady foot traffic.

On the right membrane, a coating adds years of service and improves reflectivity. We inspect first and tell you plainly when a roof is not a candidate.
Roof pitch, the age of the house, and how long you plan to stay drive this decision more than price alone. Freeze-thaw swings, humid summers, and heavy leaf load from the borough’s tree canopy factor into every recommendation.
Water that gets past the roof rarely stops there. With crews and staging already on site, surrounding work costs less to handle at the same time.

Undersized gutters dump water at the fascia and foundation, and Ambler's oaks clog them fast. Gutter installation sized to the roof above is the most common add-on to a replacement.

Cracking or staining stucco usually means water is already behind the surface. Stucco remediation addresses the assembly underneath, not just the finish.

Siding that has cracked or buckled lets water reach sheathing. Siding installation detailed with the same care as the roof protects the walls and the framing behind them.
Drafts, fogged glass, and staining at sills point to a failing envelope. Window and door installation tightens the house without a full remodel.

A skylight installation with the flashing kit integrated into a new roof brings in daylight without becoming the leak that older curb-mounted units eventually turn into.
Most Ambler homeowners collect three quotes, get three different numbers, and get no explanation for the gap. Our estimator photographs what he finds, checks the attic where he can reach it, and puts the reasoning in writing before price comes up.
Our Montgomeryville office is a short run up Route 309 from Butler Avenue, which is why a borough address with water coming through a ceiling gets a crew the same day. The same crews roof homes in Spring House and Blue Bell.

In-house crews rather than subcontracted labor. The people who quote your roof are the people who install it.

A written workmanship warranty registered in your name at the final walkthrough, on top of manufacturer coverage.

GAF Certified Plus and CertainTeed Master Shingle Applicator credentials, which unlock enhanced system warranties most contractors cannot offer.

Licensed and insured in Pennsylvania under registration PA064886, with certificates available before the first shingle comes off.

Ambler Borough permits pulled by us and inspections coordinated by us, not left on your desk.

120+ five-star Google reviews, Google Guaranteed status, and BBB accreditation behind the work. The before and after gallery shows what that looks like finished.
By the time water marks drywall, it has usually been moving through sheathing and insulation for weeks. An inspection takes about forty minutes and ends with photographs and a written recommendation.
Call (215) 977-7663 or request a free estimate and we will get someone out to your Ambler address.
Answer a few quick questions and we'll email your estimate.