Roofing in Somerville, MA

Somerville sits right next to Cambridge, in the heart of the territory the Mighty Dog Roofing of North Boston team works week in and week out. We're not a referral service passing your name along, and our trucks aren't coming from two states away. We're a North Boston roofing crew, and Somerville — one of the most densely built cities in New England, packed with two-families and triple-deckers from Davis Square to Winter Hill — is core to the ground we cover.

That density is the whole story here. Somerville's homes sit close together on tight lots, most of them built before 1939, and a huge share of them are rented. A roof problem in a stacked three-family isn't like a leak in a single-family ranch — water that gets in at the top can work its way down through multiple units before anyone with the authority to fix it even hears about it. Below is how we think about roofing in this specific city, and what we'd want you to know before you spend a dollar.

Neighborhoods and ZIP codes we serve in Somerville

Somerville runs across three main ZIP codes — 02143, 02144, and 02145 — with small slivers near the Cambridge and Medford lines. Wherever your roof is in the city, we cover it:

• Davis Square, Teele Square, and Ball Square
• Union Square and Prospect Hill
• Winter Hill and Magoun Square
• East Somerville and Ten Hills
• West Somerville and Powder House
• Spring Hill, Central Hill, and Clarendon Hill
• Assembly Square / Assembly Row
• Cobble Hill and the Inner Belt / Brickbottom area
• The Porter Square area along the Cambridge line

Somerville famously doesn't have official neighborhood boundaries, so if you're not sure which square you're technically in, it doesn't change anything for us — give us the address and we'll come look.

Roofing for Somerville's rental and multifamily properties

Here's the fact that shapes roofing in this city more than any other: Somerville is a renter's city. Roughly two-thirds of its homes are occupied by tenants rather than owners, and duplexes, two-families, and small apartment buildings make up more than half of the housing stock. A great many of these roofs sit over someone other than the person responsible for maintaining them.

That creates a predictable pattern. The person living under the roof — the tenant — isn't the person who calls a roofer. The owner or property manager often lives elsewhere, sometimes out of state, and understandably isn't climbing up to look at the roof twice a year. So the roof gets no attention at all until a tenant reports a stain on the ceiling or a drip in a closet. By then, water has usually been getting in for a while.

That delay is what makes the difference between a cheap fix and an expensive one. A failed flashing detail or an open seam caught early is a modest repair. The same problem discovered after months of quiet leaking means soaked decking, ruined insulation, stained ceilings — and in a stacked three-decker, often damage across more than one unit, plus displaced tenants and the liability that comes with it. The roof didn't get dramatically worse; it just went unwatched.

If you own or manage rental property in Somerville, this is exactly where we can help:

• Proactive inspections for owners who don't live on site — we go up, you don't have to. You get a written report with photos (drone-assisted) you can keep on file for the property.
• Scheduled maintenance so small failures are caught on your timeline instead of a tenant's 2 a.m. phone call.
• Fast response when a tenant does report a leak — we find the source, stabilize it, and give you a straight repair-or-replace read.
• One point of contact across multiple properties if you manage more than one Somerville building.

We're not here to talk you into work you don't need. But a roof you never look at is a roof you'll only hear about once it's already cost you.

Roofing for Somerville's older and historic homes

Nearly six in ten Somerville buildings went up before 1939, and it shows: Victorian two-families, gable-front triple-deckers, and rows of closely spaced homes with hand-built flashing details that have seen a century of New England weather. These houses are a pleasure to work on when you understand them, and a headache when you don't. Old framing isn't always square, decking under decades-old shingles can be a mix of plank and plywood, and additions and dormers were often tied in by hand a long time ago. We plan for that instead of being surprised by it.

A note on historic oversight. The Somerville Historic Preservation Commission (established 1985) enforces both the city's local historic district rules and a demolition-review ordinance. If your property sits in one of Somerville's local historic districts, exterior changes visible from a public way can require review — but routine maintenance and replacement in kind are generally exempt, and reconstruction after a fire or disaster is exempt when it's substantially similar to the original. Separately, Somerville's demolition-review ordinance applies to buildings more than 75 years old — which is most of the city — but that's aimed at teardowns and substantial exterior alterations, not a routine re-roof. The practical upshot: a like-for-like roof replacement usually isn't a historic-review problem, but if your building is designated or in a district, it's worth confirming before work starts, and we'll help you figure out where your project lands.

About slate. Some of Somerville's oldest homes still wear original slate. We want to be straight with you: slate is rare here, and it is not our specialty. Genuine slate work — matching salvaged tiles, replacing a slate field, or rebuilding the ornamental detailing some of these roofs carry — is a craft of its own. If your roof is slate and slate is the right answer, we'll tell you so and point you toward a dedicated slate specialist rather than pretend it's in our wheelhouse. Where it makes sense, we're glad to talk through asphalt as a practical alternative — but that's a conversation, not a default.

Asphalt shingle roofs, installed as a complete system

Most Somerville homes are best served by a quality asphalt shingle roof, and this is the work we do best. We're an Owens Corning Platinum Preferred Contractor, which is the top tier of their contractor network and the reason we can install — and stand behind — the complete Owens Corning roofing system rather than a pile of loose parts.

That distinction is the whole point. A roof doesn't fail because the shingles were cheap; it usually fails at the edges, the valleys, and the penetrations. Installing the full system means every layer is doing its job:

• Synthetic underlayment across the deck as a secondary water barrier
• Leak barriers (ice-and-water membrane) at the eaves and in the valleys — the exact spots where Somerville's ice dams push water backward
• Starter shingles along the eaves and rakes so wind can't get under the first course
• Shingles — modern laminate/architectural shingles that lie flat and hold their line
• Hip and ridge caps finished to match
• Ventilation — balanced intake and exhaust so the attic breathes, which is what keeps the roof from cooking itself from below and feeding ice dams from above

Installed as a system, the components are also what make the manufacturer warranty coverage meaningful. Installed piecemeal, you've just got shingles.

EPDM flat roofs — the section most owners forget

Here's the part of the roof most Somerville owners never think about until it leaks: the flat one.

A huge share of Somerville's two- and three-family homes pair a sloped, shingled main roof with a flat rubber (EPDM) roof over a back porch, a piazza, a deck, or a dormered addition. Owners diligently watch the big shingle roof and completely ignore the small flat one — right up until the ceiling under the porch starts staining. Flat roofs are simpler in principle and less forgiving in practice, because water doesn't run off; it sits and waits for a weak point. The usual culprits:

• Seams and flashing. Where the rubber laps itself or meets a wall, a chimney, or a railing post is where most flat roofs let go first.
• Ponding. Standing water that never drains accelerates aging and finds the smallest gap.
• Foot traffic. If that flat roof doubles as a deck or a shared porch — common on Somerville rentals — every footstep, planter, and dragged chair works against the membrane.
• Age and shrinkage. EPDM shrinks as it ages, pulling at its own edges and flashings until a seam opens.
• Animals. This is New England, and the wildlife knows your attic is warm. Raccoons will claw and tear at a rubber membrane to get at a heated space underneath, and squirrels are notorious for gnawing at chimney flashing on the main roof. Animal damage is one of the most common flat-roof failures we get called about, and it's almost never on the owner's radar until there's a hole.

If you own a multifamily in Somerville, the flat roof deserves the same attention you give the shingles. We'll inspect it as part of any look at your property.

New England weather, and what last winter did to Somerville roofs

You don't need us to tell you what winter does here, but the roofing consequences are specific.

Ice dams. When snow on an upper roof melts, runs down to the cold eave, and refreezes, it builds a dam of ice that forces meltwater backward — up and under the shingles, where it finds the seams and drips into the rooms below. The leak shows up at the edge of the roof and along the gutters, which is exactly why eave leak barriers matter so much. Last winter made the point emphatically: the Blizzard of 2026 in late February capped one of the snowiest Boston-area seasons in years — well over five feet of snow on the ground across Greater Boston by season's end — and the repeated freeze-thaw that came with it was a textbook ice-dam machine. On a tightly packed Somerville street, that meltwater has nowhere to go but into the building.

Snow load. Heavy, wet snow stacked on an aging or under-ventilated roof is a stress test, and structures that were already tired tend to reveal it in February.

Nor'easters and wind. High-wind storms are especially hard on old 3-tab shingles: when the wind gets under a tab, it can peel whole shingles off in full pieces, leaving bare deck exposed. Modern laminate/architectural shingles are heavier, multi-layered, and far better at staying put — one of the strongest practical arguments for upgrading an old 3-tab roof rather than patching it again.

Freeze-thaw. The daily cycle of melting and refreezing works open every small gap it can find — around flashing, in aging sealant, at the edges of that forgotten flat roof — a little more each year.

Our roofing services in Somerville

• Roof repair — leaks, storm damage, failed flashing, missing shingles, problem valleys.
• Roof replacement — full tear-off and a complete Owens Corning system, sized and detailed for your home.
• Roof inspection — free, drone-assisted, with a written report and photos you keep, whether or not you hire us.
• Storm and emergency response — fast tarping and stabilization after wind, ice, or a fallen branch.
• Flat and low-slope EPDM — repair and replacement of porch, deck, and addition roofs.
• Beyond the roof — siding, replacement windows, gutters, and skylight replacement, so the whole exterior works together and the water goes where it should.

Commercial and industrial roofing

We also handle commercial and industrial roofs across the North Boston area, including Somerville's mixed-use blocks, Union Square and Assembly Row developments, and light-industrial buildings:

• Membrane roof systems — EPDM and other commercial membrane systems suited to low-slope commercial roofs.
• Drainage and ponding fixes — correcting the standing-water problems that quietly destroy flat commercial roofs.
• Inspections and maintenance programs — scheduled care that catches small failures before they become interior damage and downtime.
• Emergency response — rapid stabilization to protect the building and what's inside it.

Optional extended warranty (commercial only). On a full commercial EPDM installation, the property owner can optionally add an RPI full-system warranty — 40 years on the EPDM membrane and 20 years on labor and accessories. It's an add-on, entirely the owner's call, and we'll lay out the cost and terms so you can decide. Please note this warranty applies to commercial roofs only — it is not available on one-family residential flat roofs.

From first call to final inspection

We keep the process the same every time so there are no surprises:

1. Inspect. We come out and look at the whole roof — including the flat sections and penetrations — and document what we find.
2. Measure. We take precise measurements so the estimate reflects your actual roof, not a guess.
3. Estimate, in writing. We provide a complete written estimate and review it with you. Nothing moves forward until you've signed off on it.
4. Permits. We apply for the required Somerville building permits (and flag any historic-district step if your building is designated or in a district).
5. Schedule. We set a date that works around the weather and, for rentals, around your tenants.
6. Install. Our crew installs the complete system, protects your property, and cleans up the site.
7. Final walkthrough and city inspection. We walk the finished roof with you and file for the city's final inspection so the job is closed out properly.

Why owners in Somerville choose us

• We're in the area constantly. Somerville isn't a place we visit; it's part of our weekly territory, right next to Cambridge.
• We know these buildings. Older and historic homes, two- and three-deckers, and the flat-roof-plus-shingle combination that defines so much of Somerville — including what it takes to work on rental property with tenants in place.
• Owens Corning Platinum Preferred Contractor — the top tier of Owens Corning's network, installing the complete system.
• Licensed and insured, with the documentation to prove it before we set foot on your roof.
• Free, no-pressure inspections — drone-assisted, with a written report and photos you keep.
• The Mighty Watchdog Warranty standing behind our work.
• Financing available, so a sudden roof problem doesn't have to become a financial emergency.

Frequently asked questions

How much does a new roof cost in Somerville?

There's no honest flat number, because price follows the roof: its size and pitch, how many layers have to come off, the condition of the decking underneath, the number of valleys and penetrations, and whether there's a flat section in the mix. A small, simple roof and a steep three-decker with a porch roof are very different jobs. What we can tell you is that our estimate is all-in, with no surprises tacked on later. Our estimate includes: all the materials needed to complete the project, labor, all permits, dumpster and disposal to the landfill. The right way to get a real figure is a free inspection and a written estimate — and we'd rather quote your actual roof than throw out a number that changes the day we get up there.

How long does a new roof take to install?

In most cases, a roof replacement takes 1–2 days. The biggest variable is what we find once the old roof comes off: the condition of the sheathing underneath. If the decking is sound, we stay on schedule. If it needs substantial carpentry work — replacing rotted or soft sheathing before the new roof goes on — plan on about a day more. A few other things can stretch the timeline: the size and pitch of the roof, complex rooflines with lots of valleys and dormers (common on Somerville's older homes), the number of chimneys and skylights to flash and seal around, and weather. We won't start a job we can't finish cleanly, so we watch the forecast and schedule around it.

I own a rental property in Somerville — how do I stay ahead of roof problems?

This is the most useful question a Somerville landlord can ask, because most roof damage here gets discovered late — a tenant reports a leak long after water started getting in. The fix is simple: don't wait for the phone call. Have the roof looked at after any major storm, and put it on a periodic schedule (see below) even when nothing seems wrong. We do drone-assisted inspections with a written report you can keep on file for the property, and we can coordinate around tenants. Catching a bad flashing detail early is a modest repair; finding it after months of leaking can mean damage across several units.

How often should I have my roof inspected?

You do not need an annual inspection — that's overkill for most homes. The sensible rhythm is: get up there (or send us up) after any major storm, and otherwise about once every two years once the roof passes 15 years old. One caveat for Somerville: if you own rental property and don't live under the roof yourself, lean toward the more frequent end, since no one on site is keeping an eye on it day to day.

How long does a roof last?

A quality architectural-shingle roof, properly installed and ventilated, can last decades. But here's the part people miss: the shingle field is rarely what fails first — the penetrations and accessories are. Rubber pipe boots around plumbing vents typically fail in roughly 15–20 years, because that exposed rubber takes direct UV that the shingles are designed to shrug off. Chimney flashing is worth checking once a roof passes 20 years. And tree-branch damage and moss or algae growth can shorten the life of any roof regardless of age. The shingles are usually fine long after the little parts need attention.

Should I repair my roof or replace it?

If the damage is localized — a few shingles, one bad flashing detail, a single leak — and the roof is otherwise sound and not too old, repair is the smart money. If the roof is near the end of its service life, leaking in more than one place, or you're patching the same areas repeatedly, you're spending good money to delay the inevitable, and replacement usually wins. We'll give you the honest read after we inspect, including when the answer is “this roof has years left in it.”

Can you roof over my existing shingles, or do you tear off?

We tear off. Mighty Dog Roofing of North Boston does not install new shingles over an existing roof — every replacement we do starts with a complete tear-off down to the deck. It's worth knowing where the code sits, because owners often ask: Massachusetts building code (780 CMR) allows a maximum of two layers of asphalt shingles, so if your building currently has a single layer, an overlay would technically be permitted. We don't do it anyway. A layover looks like it saves money on labor and disposal, but that's an illusion — you're not avoiding those costs, just pushing them down the road to whenever the roof finally comes off. And with a few years of inflation and rising material prices in between, that future tear-off almost always costs more than it would today. So there's no real saving. What a layover actually does is hide the deck — so no one can see or fix the rot, soft spots, or failed flashing that Somerville's freeze-thaw winters tend to leave behind.

My roof looks dull or dusty from the street — is that a problem?

It can be. That worn, dusty look is often granule loss — the protective mineral granules washing off the shingle and exposing the asphalt base underneath to direct UV. Once the asphalt is exposed, it dries out and degrades faster, so a roof that merely looks tired can be aging quicker than its years suggest. It's worth a look.

Do I need a permit to replace my roof in Somerville?

Yes. A building permit is required to replace a roof in Somerville, and we apply for it as part of the job. If your building is individually designated or sits in one of the city's local historic districts, there may be an additional review step — we'll flag that early so it doesn't slow you down.

Do you work on slate roofs?

Rarely, and it's not our focus. Slate is a specialized craft, and when slate is genuinely the right answer for your home we'll point you to a dedicated slate specialist rather than overreach. If you'd like, we can also talk through whether a quality asphalt system is a sensible alternative for your situation.

My flat porch roof is leaking but my shingles look fine — what's going on?

Very common in Somerville's multifamily homes. The sloped shingle roof and the flat EPDM porch or deck roof are two different roofs with two different failure modes, and the flat one almost always goes first — usually at a seam, the flashing, a ponding spot, or somewhere an animal got to it. The shingles can be in great shape while the rubber quietly fails. We inspect both.

I only get leaks in winter — why?

That's the signature of an ice dam. Snow melts on the warmer upper roof, refreezes at the cold eave, and the resulting ice forces water backward under the shingles. The fix is usually a combination of proper eave leak barriers, better attic ventilation and insulation, and addressing any spots where heat is escaping into the attic. A summer-dry, winter-wet roof is almost always an ice-dam story.

Do you do emergency roof repairs?

Yes. After wind, ice, or a fallen branch opens up your roof, we respond quickly to tarp and stabilize it so the damage stops getting worse, then come back to do the permanent repair properly.

Do you do commercial or industrial roofing?

Yes — membrane systems (EPDM and other commercial membranes), drainage and ponding corrections, scheduled inspection and maintenance programs, and emergency response for commercial and industrial buildings in the Somerville area.

Which Somerville neighborhoods do you serve?

All of them — Davis Square, Union Square, Winter Hill, East Somerville, West Somerville, Teele Square, Ball Square, Magoun Square, Spring Hill, Prospect Hill, Ten Hills, Assembly Square, and everywhere in between, across ZIP codes 02143, 02144, and 02145

Book your free inspection

Call the Mighty Dog Roofing of North Boston team at (617) 934-4336, or use the form on this page to schedule a free, no-pressure, drone-assisted inspection with a written report you keep.