Roofing in Charlestown, MA

Charlestown is Boston's oldest neighborhood, and it looks the part: brick rowhouses and triple-deckers packed tight along narrow streets, climbing the hill toward the Bunker Hill Monument and running down to the water at the Navy Yard. It's a one-square-mile peninsula wrapped by the Charles and Mystic Rivers and Boston Harbor — and roofing here is its own kind of work. The Mighty Dog Roofing of North Boston team is in Charlestown regularly, and its rooftops are unlike almost anywhere else we serve.

Two things define roofing in the Town: the buildings are old, dense, and mostly flat-roofed, and the harbor is always working on them. Charlestown's 19th-century rowhouses and three-deckers sit shoulder to shoulder with little room around them, their roofs are more often flat or low-slope than steeply pitched, and the wind and salt off the harbor are hard on everything up top. Add tight streets with nowhere to park a dumpster and a neighborhood that takes its history seriously, and you have roofing that rewards a crew that has actually done it here. Below is how we think about it, and what we'd want you to know before you spend a dollar.

Neighborhoods and ZIP codes we serve in Charlestown

Charlestown is compact — about one square mile — and runs on a single ZIP code, 02129. We cover all of it:

• Monument Square and Town Hill
• Thompson Square and City Square
• The Navy Yard and the waterfront
• Sullivan Square and the Neck
• Bunker Hill and Main Street
• Warren Street and the side streets in between

Wherever your roof is — a Federal-era rowhouse near the Monument, a three-decker off Main Street, or a converted condo down by the Navy Yard — give us the address and we'll come look.

Roofing for Charlestown's rowhouses and triple-deckers

This is the heart of roofing in Charlestown. The Town's brick rowhouses and wood-frame three-deckers were built close together in the 1800s and early 1900s, and their roofs share a few traits that shape everything we do here.

Most of them are flat or low-slope. Behind a rowhouse's short front parapet, the roof usually runs nearly flat to the back — so the roof isn't shedding water so much as holding it until it drains. That puts all the pressure on the membrane, the seams, and the flashing rather than on shingles (more on flat roofs below).

They're packed tight, with tricky access. Narrow one-way streets, no driveways, shared walls, and neighbors a few feet away mean staging a roof job in Charlestown takes planning — where the dumpster goes, how materials get up, how we protect the building next door. We sort that out before we start rather than discover it on day one.

Many are condos or multifamily. A lot of Charlestown's rowhouses are now condominiums, and its three-deckers are stacked homes. On a shared building, a roof problem doesn't stay in one unit — water that gets in at the top works its way down through everyone below — so getting it right the first time matters more, and we're used to coordinating with owners, trustees, and associations.

A note on history and permits. Charlestown is Boston's oldest neighborhood, and people here rightly care about preserving it — but the regulatory picture is more specific than you might expect. Roofing permits go through the City of Boston's Inspectional Services Division, and a permit is required to replace a roof. As for historic design review: Charlestown is not (yet) a citywide local historic district, and a routine re-roof generally isn't subject to Boston Landmarks Commission review. Only a small number of individually designated landmark buildings are reviewed for exterior changes, and a first local district around Monument Square has been proposed but is still in process. If your building is an individual landmark — or if you're near Monument Square — it's worth checking your specific address before work begins, and we'll help you do that.

About slate. A few of Charlestown's oldest houses still wear slate. We'll be straight with you: slate is a specialized craft and not our specialty. If your roof genuinely needs slate work, we'll point you to a dedicated slate specialist rather than overreach — and where it makes sense, we're glad to talk through a quality asphalt or membrane alternative.

Harbor weather and Charlestown roofs

Charlestown sits on a peninsula with water on three sides, and the harbor shapes what its roofs go through.

Wind. Out toward the water — especially down by the Navy Yard and the waterfront — roofs catch stronger, more sustained wind than they would inland. Wind finds the edge of a flat roof's membrane, the parapet flashing, and any lifted shingle, and it pulls. On pitched roofs, old 3-tab shingles are the first to fail; modern laminate/architectural shingles installed with proper edge detailing hold far better.

Salt air. Salt off the harbor is quietly corrosive. It works on the metal parts of a roof — flashing, fasteners, gutters, and downspouts — so those details wear faster here than they do a few miles inland, and they're worth checking before they fail.

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 under the shingles or behind a parapet, where it finds the seams and drips into the rooms below. The Blizzard of 2026 capped one of the snowiest Boston-area seasons in years, and the repeated freeze-thaw that came with it was a textbook ice-dam machine. On Charlestown's packed streets, that meltwater has nowhere to go but into the building.

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

Asphalt shingle roofs, installed as a complete system

Charlestown is mostly flat roofs, but the Town has its pitched roofs too — and where a roof is pitched, a quality asphalt shingle system is usually the right answer. We're an Owens Corning Platinum Preferred Contractor, the top tier of their contractor network, which is why we can install and stand behind the complete Owens Corning system rather than a pile of loose parts.

A roof rarely fails because the shingles were cheap; it fails at the edges, the valleys, and the penetrations. Installing the full system means every layer does 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 ice dams push water backward
• Starter shingles along the eaves and rakes so wind off the harbor can't get under the first course
• Shingles — modern laminate/architectural shingles that lie flat and hold their line, rated for higher wind
• Hip and ridge caps finished to match
• Ventilation — balanced intake and exhaust so the roof doesn't cook from below or feed 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.

Flat and low-slope EPDM roofs — a Charlestown mainstay

In most of the towns we serve, the flat roof is the part homeowners forget. In Charlestown it's often the whole roof. Behind those rowhouse parapets and on top of the three-deckers, flat and low-slope roofs are the rule, not the exception — so this is work we do a lot of here.

A flat rubber (EPDM) roof is 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 parapet wall, a chimney, or a railing post is where most flat roofs let go first — and on a Charlestown rowhouse, that parapet flashing does a lot of the work.
• Ponding. Standing water that never drains accelerates aging and finds the smallest gap.
• Roof decks and foot traffic. Plenty of Charlestown roofs double as decks for the skyline and harbor views. Every footstep, planter, and dragged chair works against the membrane, so a roof that's also a living space needs the right build and careful detailing.
• Age and shrinkage. EPDM shrinks as it ages, pulling at its own edges and flashings until a seam opens.
• Harbor wind at the edges. Uplift pulls at the membrane's perimeter and the edge metal — the first place a flat roof starts to peel — which is why how the edges are fastened and sealed matters as much as the field.
• Animals. Even in the city, wildlife finds the roofline. Raccoons will claw and tear at a rubber membrane to reach a warm space beneath it, and squirrels work at chimney flashing — both a common and overlooked cause of flat-roof leaks.

Whether the flat roof is the whole top of your rowhouse or just a low-slope section out back, we inspect, repair, and fully replace flat and low-slope EPDM roofs — and we'll look at yours as part of any visit to your property.

Our roofing services in Charlestown

• Roof repair and leak investigation — leaks, storm damage, failed flashing, missing shingles, problem valleys, and nail pops. When the source of a leak isn't obvious, we track it down before we patch it — figuring out where the water actually gets in is often the hard part.
• Roof replacement — full tear-off and a complete Owens Corning system, sized and detailed for your building.
• Chimney flashing repair — the flashing and step flashing where a masonry chimney meets the roof is one of the most common leak points on Charlestown's older buildings. We repair and reseal these details to stop the leaks that start there.
• 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.
• Roof snow clearing — after heavy snowfall, we can remove built-up snow from the roof to reduce the load it places on the structure.
• Flat and low-slope EPDM — repair and full replacement, whether the flat roof is the entire top of a rowhouse or just a low-slope section out back, including parapet flashing and drainage.
• Beyond the roof — siding, replacement windows, gutters, and skylights (installation, replacement, and leak repair), so the whole exterior works together and the water goes where it should.

Commercial and industrial roofing

Charlestown's Main Street, City Square, the Navy Yard, and the businesses around Sullivan Square mean commercial roofs too, and we handle commercial and industrial roofing across the North Boston area:

• 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.

Siding Replacement and Repair Services

Looking to make a statement and be the envy of your neighbors? Refresh the look of your home with new siding. Increasing your home's curb appeal will only help increase its resale value, an investment worth making. Protect your home from the weather elements while improving your insulation and reducing roof maintenance issues for the longevity of your exterior.

Types of Siding

• James Hardie fiber cement
• Vinyl
• Red cedar shakes and shingles
• Red cedar clapboards

Window Installation Services

Your windows can be the statement of your exterior's beauty. High-efficiency new and replacement windows with industry-leading warranties can add function, comfortability, and energy savings to your home, increasing the resale value. Walking into a bright space with many windows will give your family and guests a comfortable and cheery environment to enjoy. Be sure to keep the energy rating documentation for your new windows to share with prospective buyers. Mighty Dog professionals will consult with you for the best options for your Charlestown Massachusetts home. Let us do the homework for you.

Types of Windows

• Single Hung
• Double Hung
• Slider
• Picture
• Patio Door
• Casement

Gutter Installation Services

Gutters can be mostly functional or the envy of your neighbors. Either way, Mighty Dog Roofing is the company you can trust with your gutter repair & installation needs. We can install the right type of gutter with comprehensive warranty coverage to meet your needs, from seamless aluminum gutters with baked-on enamel finish to custom copper gutters and downspouts. It is your choice, but our Mighty Dog Pledge gives you peace of mind by making sure we safely and effectively move rainwater from your Charlestown Massachusetts home's exterior.

We will accurately assess your gutter project needs and the current system for any repairs or updates that might be warranted. Our expert project managers will review the bigger picture around the perimeter of your home, which could lead to potential issues such as the trees surrounding your home and any drainage issues we see around your foundation.

Types of Gutters

• Aluminum Seamless Gutters
• Copper Gutters

Gutter guard and flashing installation

On Charlestown's tightly packed streets, water that overflows a clogged gutter has nowhere good to go — it spills over the back edge onto the fascia, runs down the brick and siding, and pools between closely spaced buildings. Gutter guards keep leaves and debris out and the gutters flowing, so rain drains off the building instead of backing up — which matters even more on a stacked rowhouse or three-decker, where a small problem can reach more than one unit. We can add them to your existing gutters or install them as part of a new gutter system.

We also install gutter flashing — aluminum flashing set behind the drip edge and over the gutter, so runoff is carried over the back edge and into the gutter instead of slipping behind it. That's what keeps the wooden fascia and soffit boards from staying wet and rotting out — a problem that only accelerates in Charlestown's damp, salty harbor air when that flashing is missing or has failed.

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, parapets, 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 City of Boston building permits (and flag any historic step if your building is individually landmarked or near Monument Square).
5. Schedule. We set a date that works around the weather, the tight access, and your building.
6. Install. Our crew installs the complete system, protects your property and your neighbors', 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.

Protecting your property during a roof replacement

A roof replacement is a messy job, and how a crew handles that says a lot about them. Before we start, we take steps to protect the area around your building and shield your deck, patio furniture, and AC unit from falling debris. When the work is done, we remove the debris and run a magnetic sweep across the sidewalk, driveway, and any yard to pick up stray roofing nails.

Why owners in Charlestown choose us

• We know these buildings. Brick rowhouses, three-deckers, parapet flat roofs, and the tight-access, coordinate-with-the-neighbors reality of working in the Town.
• We're right across the water. Charlestown is part of our regular territory, not a place we visit.
• 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 Charlestown?

There's no honest flat number, because price follows the roof: its size, whether it's flat or pitched, how many layers have to come off, the condition of the decking underneath, the flashing and parapet detail, and how tough the access is. A small rowhouse flat roof and a full three-decker 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.

Are you licensed and insured?

Yes. Mighty Dog Roofing of North Boston is fully licensed and insured — Massachusetts licensing, general liability coverage, and workers' compensation.

What warranty do you offer?

Your roof is covered on two levels. The materials carry the manufacturer's warranty from Owens Corning, whose complete system we're certified to install as a Platinum Preferred Contractor. On top of that, our own Mighty Watchdog Warranty covers our workmanship for five years: if a leak develops because of how the roof was installed, we come back and make it right — labor, materials, and disposal all included, at no cost to you. Put simply, the manufacturer stands behind the shingles, and we stand behind the installation.

Do you offer financing?

Yes. A roof usually isn't a planned purchase — it's something that goes wrong at an inconvenient time — so we offer financing to keep a sudden roof problem from becoming a financial emergency. We'll walk you through the options so you can spread the cost out and still get the work done when it needs doing.

How do I know if I need a new roof?

A few signs are worth watching for. On a flat roof, look for blisters, splits, or open seams in the membrane, and standing water that never drains. On a pitched roof, watch for shingles that are curling, buckling, or cracked, bald patches where the granules have worn away, or shingles gone missing after a storm. Inside, damp or stained spots after rain point to a roof letting water in. And a roof that leaks in more than one place, or that you're patching again and again, is usually telling you it's near the end. The honest way to know is a free inspection: we'll tell you whether you need a new roof or whether yours has years left in it.

Can you replace a roof in winter?

Yes — we work year-round. New England winters don't stop roofs from failing, so they don't stop us from fixing them; asphalt shingles and EPDM can be installed safely in cold weather when the work is sequenced and detailed correctly. What we won't do is start a job we can't finish cleanly, so we watch the forecast and schedule around snow and storms. If your roof fails in February, you don't have to wait until spring.

Do you replace the flashing and drip edge when you install a new roof?

Yes. Because every roof we replace is a full tear-off down to the deck, we install new flashing and drip edge as part of the new system rather than reusing the old metal. Flashing — around chimneys, walls, parapets, valleys, and the roof edges — is where a large share of leaks begin, so putting a new roof over tired flashing would just build a new roof around an old problem. New roof, new flashing and edge metal.

My rowhouse has a flat roof — is that different from a shingle roof?

Very. A flat or low-slope roof doesn't shed water the way a pitched roof does; it holds it until it drains, so it lives or dies on the membrane, the seams, and the flashing rather than on shingles. That's the most common roof in Charlestown, and it's work we do constantly — repair and full EPDM replacement, including the parapet flashing and edge detailing that a Town rowhouse depends on.

Do you replace flat roofs that are also used as decks?

Yes, and it's common here — a lot of Charlestown roofs double as decks for the views. A roof that's also a living space takes more wear from foot traffic, planters, and furniture, so it needs the right membrane and careful detailing. We'll look at how the deck is built over the roof and make sure the waterproofing underneath is sound.

How long does a new roof take to install?

Most roof replacements take 1–2 days. The biggest variable is what we find once the old roof comes off — the condition of the decking underneath. If it's sound, we stay on schedule; if it needs carpentry work before the new roof goes on, plan on about a day more. In Charlestown, tight access can add time too, since materials and debris have to move through narrow streets. We won't start a job we can't finish cleanly, so we watch the forecast and schedule around it.

How long does a roof last?

A quality architectural-shingle roof, properly installed and ventilated, can last decades — but the shingle field is rarely what fails first. The penetrations and accessories are. Rubber pipe boots around vents typically fail in roughly 15–20 years, and chimney flashing is worth checking once a roof passes 20 years. If your roof is a flat EPDM rubber membrane — as most Charlestown roofs are — a well-installed one generally lasts about 20 to 30 years, with thicker membrane (60-mil versus 45-mil) and less ponding and foot traffic pushing you toward the upper end. On a flat roof too, the field usually outlasts the details: seams, flashing, and edge terminations tend to open up first.

Should I repair my roof or replace it?

If the damage is localized — a bad seam, one 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 spots repeatedly, 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 roof, or do you tear off?

We tear off. Mighty Dog Roofing of North Boston does not install a new roof over an existing one — every replacement starts with a complete tear-off down to the deck. Massachusetts building code (780 CMR) allows a maximum of two layers of asphalt shingles, so a single-layer roof could technically be overlaid, but we don't do it. A layover looks like it saves money, but that's an illusion — you're just pushing the tear-off cost down the road, where inflation makes it more expensive later. Worse, it hides the deck, so no one can see or fix the rot, soft spots, or failed flashing underneath. On a flat roof it's the same story: a new membrane over an old, wet one just traps the problem.

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

Yes. A building permit is required, and we apply for it through the City of Boston's Inspectional Services Division as part of the job. Charlestown is not currently a local historic district, so a routine re-roof generally isn't subject to Boston Landmarks Commission design review — but a small number of individually landmarked buildings are reviewed, and a district around Monument Square has been proposed. If your building is landmarked or near the Monument, we'll flag it early and help you check.

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 we'll point you to a dedicated slate specialist rather than overreach. We're glad to talk through whether a quality asphalt or membrane system is a sensible alternative for your situation.

I own a condo or rental in Charlestown — can you help?

Yes. A lot of Charlestown's rowhouses are condos and its three-deckers are stacked homes, and we work for owners, trustees, associations, and property managers as well as owner-occupants. We do drone-assisted inspections with a written report you can keep on file, coordinate around tenants and shared access, and handle repairs or full replacements. On a shared building, catching a small flashing or seam problem early is a modest repair; finding it after months of quiet leaking through several units is not.

Why does my roof leak — and does the season matter?

The season is a clue to the cause. A roof that leaks during heavy rain, any time of year, usually has a flashing, seam, or membrane problem letting water in. A leak that shows up only in winter, without rain, is the classic sign of an ice dam — snow melts on the warmer upper roof, refreezes at the cold eave, and the ice pushes water back up under the roofing. Either way we find the source first, then fix it: for rain leaks that means the failed flashing, seam, or membrane detail, and for ice dams the fixes we handle are proper eave leak barriers and better attic ventilation to keep the roof deck cold and even.

How often should I have my roof inspected?

You don't need an annual inspection. The sensible rhythm is a look after any major storm, and otherwise about once every two years once the roof passes 15 years old — a little sooner for a flat roof, since ponding and seam wear are worth catching early.

Do you do emergency roof repairs?

Yes. After wind, ice, or a storm 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 across Charlestown, including the low-slope roofs around Main Street, City Square, and the Navy Yard.

Which Charlestown neighborhoods do you serve?

All of them — Monument Square, Town Hill, Thompson Square, City Square, the Navy Yard, Sullivan Square, Bunker Hill, Main Street, and everywhere in between, across ZIP code 02129.

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.