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Updated June 2026

Best Flat & Low-Slope Roofing Contractors in Boston

Compare services, check credentials, and contact a roofing company directly.

How we choose

4 results

Compare contractors (4)

Quick Comparison

Rank Company Specialty Experience BBB Website
1 O'LYN Roofing Residential & Commercial Since 1974 A+ Accredited Visit
2 Crown Contracting Commercial & Flat Roofing 40+ Yrs Listed Visit
3 CentiMark Commercial & Industrial Roofing 55+ Yrs — Visit
4 ID Flat Roof Flat & Low-Slope Roofing 24+ Yrs Accredited Visit

Detailed Reviews

#2

Crown Contracting

Commercial & Flat Roofing
Experience40+ Years
BBB StatusListed
SpecialtyCommercial & Flat Roofing
Service AreaBoston & Surrounding Communities
Services and company details

Crown Contracting is a 100% woman-owned roofing company led by founder Kate Russo that states it has served the Boston area for over 40 years. It positions itself as a flat-roofing and single-ply specialist working on multi-family units, condos, three-decker houses and historic buildings, with EPDM, TPO, slate and copper systems. The firm is a Versico Gold Medal contractor and a member of NERCA, the National Slate Association and National Women in Roofing.

Commercial Roofing Flat Roof Replacement Single-Ply (TPO/EPDM) Slate Roofing Copper Roofing Historic Restoration Roof Repair
#3

CentiMark

Commercial & Industrial Roofing
Experience55+ Years (Company)
BBB Status—
SpecialtyCommercial & Industrial Roofing
Service AreaBoston & New England
Services and company details

CentiMark is a national commercial and industrial roofing contractor with a Boston-area operation based in Chelmsford and an emphasis of 55 years of industry experience. It installs and services the full range of low-slope systems including TPO, PVC, EPDM, SPF, modified bitumen and built-up roofing, plus coatings, metal and green/solar options. The local team highlights New England challenges such as heavy snowfall, ice dams, high winds and salt-air corrosion, and offers 24/7 emergency service.

Commercial Re-Roofing TPO/PVC/EPDM Systems Roof Coatings Roof Repair Preventative Maintenance Snow Removal 24/7 Emergency Service
#4

ID Flat Roof

Flat & Low-Slope Roofing
Experience24+ Years
BBB StatusAccredited
SpecialtyFlat & Low-Slope Roofing
Service AreaBoston & Eastern Massachusetts
Services and company details

ID Flat Roof reports more than 24 years specializing in flat and low-slope roofing across Boston, Newton, Cambridge and surrounding Massachusetts counties, with a second office in Wellesley. The company emphasizes PVC membrane installation as well as rubber, TPO and EPDM systems, rooftop decks, green roofs and solar PV roofing. It is a GAF certified contractor, a BBB accredited business, and backs its work with a 10-year workmanship warranty.

Flat Roof Replacement Flat Roof Repair PVC Membrane TPO/EPDM Rubber Rooftop Decks Green Roofing Skylights

Flat Roofing in Boston: Working With the City's Historic Stock and Northeast Winter Loads

For Boston triple-deckers and rowhouses with historic flat-roof sections

Boston's iconic triple-deckers represent a distinct flat-roof challenge: low-pitch sections over rear porches and bay additions that receive heavy foot traffic and accumulate debris from adjacent taller structures. Specialist contractors familiar with this building type understand the drainage limitations of original internal drain configurations and can recommend membrane systems compatible with Boston Landmarks requirements where applicable.

After major snow or ice events cause drainage failures

Boston's position in the Northeast means flat roofs must handle significant snow accumulation and the ice-dam formation that follows warm spells. When internal drains freeze or are buried under snow, ponding loads can exceed structural tolerances on older buildings. Post-storm assessment by a flat-roof specialist should confirm both the membrane condition and the structural adequacy of the deck before the next storm season.

When converting an underused flat roof to accessible outdoor space

Many Boston properties seek to convert existing flat roofs to decks or garden terraces. This involves waterproof membrane selection compatible with foot traffic or growing medium loads, drainage redesign to handle irrigation and concentrated rain events, and a permit process that includes structural review. Flat-roof specialists who have navigated Boston's Inspectional Services permit process for these projects can guide the sequence efficiently.

Frequently Asked Questions

How many flat & low-slope roofing contractors are in Boston?

Our directory lists 4 independently verified flat & low-slope roofing contractors serving Boston, Massachusetts, ranked by experience, certifications and reputation. O'LYN Roofing is ranked #1.

How do I choose a flat & low-slope roofer in Boston?

Confirm licensing and insurance for Massachusetts, ask for flat & low-slope project references in Boston, get multiple written quotes, and check each contractor's BBB standing. Every company listed here has been independently researched.

What membrane types work best on Boston flat roofs given the city's winter conditions?

Modified-bitumen systems — particularly torch-applied or cold-process SBS — have dominated Boston's residential and mid-scale commercial flat-roof market for decades because they perform reliably in New England's freeze-thaw cycling and can be installed in shoulder-season temperatures when single-ply adhesives are less effective. High-quality EPDM with factory-vulcanized seams is also common on Boston commercial roofs, where the fully adhered system performs well under Boston's snow load and wind exposure conditions.

Does Boston require a permit for flat-roof repairs on a historic building?

Boston Inspectional Services requires a building permit for roofing work beyond routine maintenance, and projects on landmarks or in historic districts may also require review by Boston Landmarks Commission or the state Historic Preservation Office. The review process evaluates whether proposed work aligns with preservation standards for the building type. Filing early and using a contractor experienced with Boston's preservation review process avoids delays that can leave a building exposed to seasonal weather.

How does Boston's urban heat island affect flat-roof membrane selection?

Boston's urban core retains heat relative to surrounding suburbs, meaning that cool-roof membranes — white-surfaced modified-bitumen cap sheets or TPO — can provide meaningful cooling load reduction during summer. Massachusetts has adopted energy code provisions that incentivize cool-roof surface reflectance on commercial buildings, and the state's utility programs periodically offer rebates for qualifying cool-roof installations. For older Boston buildings with dark-surfaced built-up roofs, a cap sheet overlay with a reflective surface is often the most practical upgrade path.