Fast, Reliable Roof Replacement & Installation Across Somerville
Roof replacement in Somerville, MA typically costs between $8,500 and $22,000 for a full flat-roof replacement on a triple-decker, with most jobs completed in 2-4 days once materials are staged. Our crews have been working in Somerville since 1984, and we know the logistics of tight-block jobs from Winter Hill to East Somerville. Call (844) 563-1816 - a live person answers, even at 2 a.m. after a nor’easter.
Somerville’s housing stock is unlike anywhere else in Massachusetts. The city holds one of the highest concentrations of triple-deckers in the United States, those three-story wood-frame buildings thrown up between 1890 and 1930, and their roofs are almost universally flat or very low-slope. That means EPDM or modified bitumen membrane work, not shingle tear-offs. The extreme urban density - buildings routinely 3-6 feet apart - turns every job into a staging puzzle. You cannot lean ladders on side walls. Materials come up over the front or rear, often by hand line or mechanical hoist, and that means a street-occupancy permit from Somerville DPW before the first roll of membrane leaves the truck.
We’ve replaced flat roofs on triple-deckers in 02143, 02144, and 02145 for over four decades. Pete Navarro started this company in 1984, and we’ve trained local apprentices into journeymen who know how to read a century-old deck for rot without tearing up half the roof to find it. Our Roof Replacement & Installation team arrives in uniform, background-checked, and documents every inspection with photos from your actual roof - not a scary speech in the driveway.
Why Ridgeline Roofing Co. Is Somerville’s Preferred Roof Replacement & Installation Company
Forty-two years in business means we’ve seen Somerville change. The old manufacturing blocks near Union Square became condos. The Assembly Row development brought new construction. But the triple-deckers stayed, and so did we. Homeowners in Prospect Hill and Winter Hill call us because their neighbor called us, because their parents called us, because we were here before the price of a Cambridge condo went vertical and we’ll be here after.
Our reviews from Somerville customers mention the same things: we show up when we say, the price on the estimate matches the invoice, and Pete Navarro’s 90-Day Done Right Promise means no paperwork runaround if something needs adjustment. One Winter Hill homeowner put it plain: “They hoisted everything over the front, never touched the neighbor’s wall, and the leak stopped.” That’s the standard we hold.
Response time to Somerville is same-day for emergencies, next-day for inspections. A live person answers every call, 24/7. No voicemail trees. No callback windows. When a nor’easter tears your parapet flashing loose at midnight, you reach us, not a recording.
We know the local conditions that kill flat roofs here. Somerville sits squarely in the Boston nor’easter belt, so flat triple-decker roofs face repeated freeze-thaw cycles, wind-driven rain under parapet cap flashing, and ice dam formation where heat escaping through poorly insulated top-floor ceilings melts snow that refreezes at parapet drains and scuppers. A failure mode far more destructive on flat membranes than on pitched roofs where ice can slide off. That knowledge changes how we spec materials, how we detail flashings, and how we pitch insulation for drainage on roofs that were built dead-level in 1910.
Our Roof Replacement & Installation Services in Somerville
Full Roof Replacement
A full roof replacement on a Somerville triple-decker starts with understanding what you’re actually standing on. These buildings carry 90-140 years of previous re-roofing, layers of old modified bitumen, tar, gravel, and sometimes a buried EPDM sheet from a 1990s patch. We strip to the wood deck, assess structural shear from decades of freeze-thaw, and replace rotted sheathing before the new membrane goes down. Our crew on a 1920s Winter Hill job found three previous roofs, water trapped between layers, and a ceiling stain that had been growing for two seasons. We stripped clean, installed tapered insulation for positive drainage, and hoisted all materials over the front using a hand line because the side walls were only 4 feet from the neighbor’s building. Done right - and if it’s not, we make it right.
Flat Roofing
Flat roofing is the backbone of our Somerville work. The near-flat cap roofs over top floors in neighborhoods like Winter Hill, Prospect Hill, and East Somerville demand membrane expertise, not shingle crews pretending they know EPDM. We install GAF and CertainTeed modified bitumen systems, fully adhered EPDM from authorized stock, and tapered polyiso insulation where drainage has failed. Parapet walls trap ice and pooling water; we detail cap flashing with soldered copper or coated aluminum, not bent tin that’ll crack in the first freeze. Every flat roof we replace in Somerville gets a post-installation flood test before we sign off.
Asphalt Shingles
Shingle work on Somerville homes is usually the small stuff - dormers, bay-window rooflets, porch roofs, the occasional pitched roof on a later addition. But small doesn’t mean simple. These tie into flat membrane systems with critical flashing transitions that fail first. We use GAF Timberline HDZ and CertainTeed Landmark lines, installed to manufacturer spec so your warranty holds. On a Prospect Hill triple-decker last spring, we replaced a shingled dormer and found the previous roofer had caulked the membrane-to-shingle transition instead of installing proper step flashing. We stripped it, installed correct flashing, and the homeowner hasn’t seen a drop since.
Metal Roofing
Metal roofing in Somerville makes sense for select applications - standing seam on a modern addition, aluminum shingles on a bay window rooflet where weight matters. We install Atlas and Tamko metal systems, never the thin-gauge stuff that dents in hail. Metal’s advantage is longevity, but on a triple-decker it must integrate cleanly with existing flat membranes. We fabricate custom transition flashings in our shop rather than bending stock on-site. The result is a joint that moves with thermal expansion without splitting.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Somerville
We are authorized installers for seven manufacturer lines: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For Somerville flat-roof work, we stock GAF modified bitumen rolls and CertainTeed Flintlastic systems at our local warehouse, which means no waiting three weeks for a membrane order when your triple-decker’s top floor is leaking into the kitchen. We do not substitute materials. The brand on your estimate is the brand on your roof. Same-day pickup for common widths and thicknesses keeps most Somerville jobs on schedule even when weather windows are tight.
Common Roof Replacement & Installation Problems We See in Somerville Homes
- Ice dams at parapet walls - Flat triple-decker roofs in Somerville collect meltwater where top-floor heat escapes and refreezes at parapet drains. The ice lifts membrane edges and backs water into the building. We prevent this with proper insulation baffles, heated drain paths, and membrane extensions that seal under parapet coping.
- Wind-driven rain under loose parapet flashing - Nor’easters in Somerville hit low-slope roofs with horizontal rain that finds any gap in cap flashing. We see this constantly on older modified bitumen jobs where the previous contractor used surface-mounted metal instead of reglet-set or through-wall flashing. We install proper counterflashing sealed with compatible sealants.
- Structural shear on century-old deck sheathing - Repeated freeze-thaw on flat membranes with poor drainage saturates the wood deck below. Over decades, the sheathing loses structural integrity. We probe systematically during tear-off and replace damaged sections with matched lumber before membrane installation.
- Failed drainage from dead-level original construction - Many Somerville triple-deckers were built with zero slope. Water pools, accelerates membrane degradation, and finds the weakest seam. We install tapered insulation systems that create minimum 1/4 inch per foot drainage toward existing or new scuppers and drains.
Pricing for Roof Replacement & Installation in Somerville, MA
| Service | Typical Range in Somerville |
|---|---|
| Full flat-roof replacement, triple-decker (EPDM or modified bitumen) | $8,500 - $22,000 |
| Flat-roof replacement with tapered insulation and drainage correction | $12,000 - $28,000 |
| Small shingle dormer or bay-window rooflet replacement | $1,800 - $4,500 |
| Metal roof, standing seam (per square) | $1,200 - $1,800 |
| Emergency tarp and temporary seal (storm response) | $350 - $850 |
| Seasonal inspection with photo documentation | $89 |
What moves the number? Deck condition is the big variable. A triple-decker with intact sheathing and one previous roof sits at the lower end. Three buried layers, rotted wood, and structural repair pushes toward the top. Tight-block access requiring hoists and street permits adds logistical cost but protects your neighbor’s property and keeps the job legal. We quote upfront - the number on the estimate is the number on the invoice. No surprises. Call (844) 563-1816 for a free estimate; we’ll inspect, photograph, and explain what you’re actually paying for.
We Also Serve Cities Near Somerville
Our crews work throughout the Boston metro area. We handle Roof Replacement & Installation in Somerville and neighboring Cambridge, Medford, Everett, and Malden. Same standards, same live-answer phones, same written 90-Day Done Right Promise. Whether you’re in a Somerville triple-decker, a Cambridge condo, or a Medford single-family, we show up with background-checked technicians and photo-documented inspections.
Serving Somerville, MA - Our Local Coverage Area
We’re based in the Somerville area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Roof Replacement & Installation in Somerville
Yes, virtually every triple-decker roof replacement in Somerville requires a street-occupancy permit from the City of Somerville DPW because materials must be staged on the sidewalk or street when side-wall access is impossible. We handle the permit application as part of our project planning, including coordination of hoisting schedules and traffic control. Call (844) 563-1816 and we’ll walk you through the timeline - estimates are free.
Fully adhered EPDM or multi-ply modified bitumen with proper insulation performs best in Somerville’s nor’easter belt. EPDM handles thermal cycling without cracking; modified bitumen resists puncture during hoisting and foot traffic on tight job sites. We specify based on your roof’s condition, access constraints, and budget. Call (844) 563-1816 for a free inspection and we’ll recommend what makes sense for your building.
Wind-driven rain penetrates under loose or improperly detailed parapet cap flashing, and ice dams at the parapet force water backward under the membrane edge. This is the most common failure mode we see on Somerville flat roofs after winter storms. The fix requires removing coping stones, installing proper through-wall or reglet flashing, and resealing the membrane termination. Call (844) 563-1816 for emergency response or to schedule a post-storm inspection.
Yes, we can transition from modified bitumen to fully adhered EPDM or to a hybrid system with extended warranty coverage. Material changes require attention to drainage paths, insulation compatibility, and parapet detailing, all of which we address in the estimate. The goal is a roof that outlasts the next three owners. Call (844) 563-1816 for options specific to your Somerville building.
We strip damaged membrane, repair saturated insulation and deck sheathing, then reinstall with proper slope toward drains and heated drain paths where needed. For chronic ice dam buildings, we coordinate with insulation contractors to reduce top-floor heat loss. We replaced a Winter Hill flat roof last winter where ice dams had destroyed two years of patchwork; the new system with tapered insulation and corrected drainage has stayed dry through two nor’easters. Call (844) 563-1816 for a free assessment.
Written by Pete Navarro, Owner at Ridgeline Roofing Co., serving Somerville since 1984.