Roofing Contractors in South Boston, MA

What we actually find on Southie roofs

The typical 02127 building is a wood-frame two- or three-family with a hipped perimeter and a flat or near-flat center deck. Under the membrane is board sheathing, not plywood, and the boards have gaps. Beneath that you often hit smooth built-up asphalt with a silver coating. We open a corner or pull a core before quoting, because two layers is a different job than one, and the difference shows up in the dumpster.

• Ponding at the low corner of a near-flat deck, usually where an old drain was never reset after the last flat roof replacement in Boston.
• Roof decks on sleepers and pavers with penetrations nobody flashed properly.
• Shared parapets and coping between party walls, where the neighbor's last reroof stopped an inch short of the joint.
• Rear porch stacks blocking the only clear path to the roof.
• Rotted board sheathing at the eave, the normal finding on a 120-year-old frame.

Salt air and wind off the harbor

FEMA coastal guidance recommends 300-series stainless fasteners within about 3,000 feet of saltwater. On this peninsula that covers nearly everything from Castle Island to Andrew Square. Hot-dipped galvanized is the practical minimum anywhere in South Boston. It is also why we never set copper flashing with galvanized nails — two dissimilar metals sitting in salt spray drive galvanic corrosion, and the flashing fails years before the roof does.

Wind is the other half of the problem. 780 CMR treats hurricane-prone areas within a mile of the coastal mean high-water line as a windborne debris region where Vasd is 130 mph or greater. On a harbor-facing building that means tighter perimeter fastening, mechanically secured edge metal, and no guessing on the drip edge. Most low-slope failures here start at the edge and work inward, which is why roof flashing and chimney repair is half of what we do in this ZIP code.

Snow, ice and the 40 psf design load

Boston's design ground snow load is 40 psf, verified from the 780 CMR Eighth Edition table — confirm the current figure with the Boston building official before any structural work. Logan averages 49.2 inches of snow a year. Winter 2014-15 dumped 110.6 inches, and January 29, 2022 dropped 23.6 inches in one calendar day. A flat Southie roof holds all of it, and the drifts pile deepest against parapets and party walls where the wind stalls.

The thaw does more damage than the snow. Boston sees about 92 days a year at or below freezing but only about 23 that stay frozen all day. That gap splits old built-up seams and cracks chimney crowns. On the pitched Victorians around Thomas Park and Dorchester Heights, code calls for an ice barrier reaching at least 24 inches inside the exterior wall line, and at least 36 inches measured along the slope on anything 8:12 or steeper.

Fort Point, the Seaport and commercial low-slope

02210 is its own world. Nineteenth-century brick warehouses with heavy timber framing now carry large-format membrane, old built-up assemblies, roof decks and rooftop mechanical equipment. Curbs, drains and pitch pockets are where those roofs leak, not the field. We handle commercial roofing in Boston on these buildings and will tell you plainly whether a section repair or a full tear-off is the honest answer.

Fort Point Channel is a designated Boston Landmark District. That matters: Boston Landmarks Commission approval must be obtained before Inspectional Services will issue the permit for exterior work you can see. Roof decks, rail systems, new mechanical screens and visible edge metal all trigger review. BLC can be reached at 617-635-1935 or BLC@boston.gov, and we build the review time into the schedule rather than pretending it does not exist.

Permits and who actually owns the roof

A residential reroof with no structural work goes through the Boston ISD Short-Form Permit: $20 application plus $10 per $1,000 of the work estimate. We file the trade license front and back, the Certificate of Liability Insurance, the Workers' Comp affidavit, the signed contract, the Site Safety Plan Affidavit and the Mattocks-Higgins affidavit. Our guide to the Boston short-form roof permit process walks through it if you want to see the paperwork first.

Membrane choice on a flat Southie roof

EPDM, TPO and PVC all work here. EPDM handles freeze-thaw and foot traffic well and is forgiving to detail around a roof deck. TPO reflects heat, which matters on a top-floor unit with no attic buffer. PVC holds up best against grease and chemical exposure, which is a real consideration near restaurant exhaust in the Seaport. We break the tradeoffs down in EPDM vs TPO vs PVC for Boston flat roofs, and we install what the building needs rather than whatever we bought a pallet of.

Neighborhoods we work in every week

City Point, Telegraph Hill, Andrew Square, the Lower End, West Broadway and D Street, the East Side, Fort Point and the Seaport. We are on the same roofs across the channel in the South End and next door in Dorchester, so a crew is usually close by. Storm calls get priority — storm damage roof repair after a nor'easter means we tarp first and scope the permanent fix once the wind drops.