Full-service roofing for Somerville’s triple-deckers, Victorians, and multi-family homes — replacements, repairs, and flat roof systems with full tearoff and ice protection in the tightest working conditions in Greater Boston. Google Guaranteed. 150+ five-star reviews.






Somerville is the densest city in New England — 81,000 people in 4.2 square miles. The housing is overwhelmingly triple-deckers and two-families, most built before 1940, packed onto lots with zero side yards and shared driveways. Roofing here isn’t just about materials — it’s about logistics, access, and doing quality work in conditions that leave no room for error.
CUSTOMER FEEDBACK ・ HEAR FROM OUR CLIENTS
5.0 Stars Across 150+ Reviews
Posted on Curtis MatthewsTrustindex verifies that the original source of the review is Google. Our house in Danvers needed new siding and trim, and this was not an easy project. There were surprises once the old siding came off, but John walked us through everything calmly and professionally. The final result looks incredible and feels built to last.Posted on Joshua DixTrustindex verifies that the original source of the review is Google. Very professional operation. Clear contract, good communication, and high-quality work. Our new roof looks great and the flashing details are far better than what we had before.Posted on Imani YussifTrustindex verifies that the original source of the review is Google. We’re in Marblehead, close to the water, and needed exterior work that could actually stand up to the elements. D&G Exteriors replaced our roof and trim, and the difference in quality compared to previous work on the house is obvious.Posted on Miguel RojasTrustindex verifies that the original source of the review is Google. John took the time to explain things without talking down to us, which we really appreciated. The siding project went smoothly and the house looks brand new.Posted on Isaiah TuckerTrustindex verifies that the original source of the review is Google. We hired D&G Exteriors for new windows and couldn’t be happier. Everything operates smoothly, looks great, and the install was clean and precise. Would absolutely recommend them.Posted on Owen EllingtonTrustindex verifies that the original source of the review is Google. Five stars all around. Roof, trim, gutters all look wonderful! D&G Exteriors earned our trust and our future business.Posted on Gabriel GarrettTrustindex verifies that the original source of the review is Google. We had storm damage to our roof and needed someone we could trust. John handled everything professionally and didn’t push unnecessary repairs. The roof looks great and we feel confident it’ll hold up long term.Posted on Mielle ButlerTrustindex verifies that the original source of the review is Google. Great communication. Quality workmanship. No BS. Would hire D&G Exteriors again without hesitation.Posted on Zamer GambrellTrustindex verifies that the original source of the review is Google. We live right on the ocean in Gloucester, and the weather absolutely beats up our house — constant wind, salt spray, storms rolling in off the water. After years of patching things, we finally decided to hire D&G Exteriors for a full roof replacement and some badly needed trim repairs. I’m so glad we did. Working on a house this close to the shoreline is no simple job. The crew had to deal with strong winds almost every day, and once they pulled the old shingles off, we found sections of the roof deck that were softened from years of salt exposure. John didn’t overreact or try to turn it into a huge problem — he showed us the damage, explained what needed to be replaced, and kept everything straightforward and fair. Despite the tough conditions, the team worked cleanly and efficiently. You could tell they were used to handling challenging environments. They installed new CertainTeed shingles, repaired the compromised areas, and replaced all the rotten fascia and trim with PVC so we won’t have to worry about it again. The house looks incredible now — sharper lines, cleaner edges, and a roof that finally feels like it can handle a real coastal storm. The best part was how professional the whole process was. They kept the site tidy even with the wind constantly blowing debris around, communicated every day, and never left us guessing about what was happening next. If you live anywhere near the water and need roofing or exterior work, D&G Exteriors is absolutely the company you want. Five stars, without hesitation.Posted on brian haskinsTrustindex verifies that the original source of the review is Google. We’re in Ipswich, and hired D&G Exteriors to replace our roof and correct a long-standing issue around a valley that had leaked during heavy rain for years. Previous repairs never fully solved it. John identified the problem immediately, reworked the flashing detail, and rebuilt that section properly instead of just patching it again. Since the replacement, we’ve been through multiple hard storms with zero issues. The roof looks great, but more importantly, the problem is finally gone. Very happy with the work and the attention to detail.
From triple-deckers near Winter Hill to Victorians in Spring Hill to renovated multi-families around Union Square, the roofing work changes block by block. Here’s what we handle.

OUR SERVICES
D&G Exteriors offers a wide range of exterior construction services in Somerville, MA. Contact us today for a free consultation and estimate!

Our roof replacement uses quality materials and expert installation to deliver a strong, weather-resistant finish. We ensure lasting protection that adds value to your home.

Our roofing services include installation, repairs, and replacements using top-quality materials. We ensure durable and attractive results that protect your home

We offer premium siding services, providing durable protection for your home while enhancing its curb appeal with modern, long-lasting materials.

Our window services include installations and replacements to improve energy efficiency and add natural light, all while complementing your home’s style.

We build and repair decks that transform your outdoor space into a functional and stylish area for relaxation and entertainment.
Repairs typically run $850–$3,000. Full replacements range from $14,000 to $30,000 depending on roof size, pitch, and deck condition. Somerville’s triple-deckers with both pitched and flat sections can run higher due to the dual-system approach and multi-story access requirements. We provide a written estimate after inspecting the roof in person.
Yes — and in Somerville, that’s the majority of our work. Triple-deckers typically have a pitched front section and a flat rear section, sometimes with a rubber membrane on a third-floor porch. We handle all of it — pitched, flat, transitions, and the tenant coordination that comes with an occupied multi-family building.
Heat escaping through poorly ventilated attics melts roof snow unevenly. The meltwater refreezes at colder eaves, backing water under shingles. Somerville’s triple-deckers are especially prone because heat from the lower two units rises through the building, supercharging the attic temperature. We address ventilation and install ice & water shield well beyond code minimum on every project.
Planning. Somerville has zero lot lines on many streets — buildings three feet apart, shared driveways, no side access. We plan material staging, dumpster placement, crane access (when needed), and debris containment before the project starts. Your project manager coordinates everything, including neighbor notification when scaffolding or access requires it.
Yes. EPDM and TPO membrane systems with proper seam welding, tapered insulation for drainage, and sealed transitions where flat meets pitched. In Somerville, flat roof work is as routine for us as shingle work — the city’s housing stock demands it.
Most single-family homes take 1–2 days. Triple-deckers typically take 2–4 days depending on roof sections and deck condition. Somerville’s access constraints can add staging time, but we build that into the schedule upfront.
Yes. The City of Somerville requires building permits for roof replacement. We handle the application, schedule inspections, and ensure the work meets current code. Somerville’s Inspectional Services department is busy — we coordinate the timeline so you’re not waiting.
CertainTeed Master Craftsman certified, Google Guaranteed, BBB Accredited with an A+ rating, and NRCA Affiliated. Every Somerville project gets the same standards whether it’s a single-family Victorian or a triple-decker.
Serving Somerville, MA, D&G Exteriors provides expert roofing services designed to protect your property and enhance its value. From installations to repairs, our durable and stylish solutions ensure long-term satisfaction. Contact us today to learn more about our professional services.