Short answer: As of September 2026, the two highest-scoring roofing contractors in the Portland-South Portland, ME metro on The Roofing Brief Contractor Score are B’s Roofing & Construction, LLC (65.6), Precision Roofing LLC (62.4). All of them carry a verifiable manufacturer certification, every rating here was cross-checked against an independent record, and no money changed hands for any placement.
The Roofing Brief scored 2 certified roofing contractors serving the Portland metro on a published, reproducible formula, then researched each of the top two individually to confirm its record. This page ranks two contractors, and that is the finding. Greater Portland is Maine’s largest metropolitan area with 571,000 residents, and within forty miles of the city we could locate exactly two manufacturer-certified roofing contractors carrying enough public reviews to assess. Both are in the Sanford and Springvale area, 32 miles south. Portland itself has none on the register. That is not an accident of our method; it reflects a market of small independent roofers who have never joined a manufacturer certification programme, in a state that licenses no general or roofing contractors at all. From 1 January 2027 that changes, and the change is the most useful thing on this page.
The conditions a Portland, ME roof has to be specified for
Maine licenses nobody. There is no state roofing licence, no general contractor licence, no exam and no board that can discipline a roofer. What exists instead is the Home Construction Contract Act: any residential construction, remodelling or repair above $3,000 must be under a written contract signed by both parties, specifying the work, the materials, the price and the payment schedule. A contractor who does not give you one has already breached the statute the Attorney General enforces. Contractors must also hold a business licence in the municipality where they work, so the town office is the only register that currently exists.
That is changing. LD 1226, the Maine Home Contractor Licensing Act, passed both chambers in June 2025 and is scheduled to commence on 1 January 2027. It creates a state licence for residential contractors on projects above $15,000, establishes a Residential Construction Board, makes unlicensed work an unfair trade practice carrying fines up to $10,000, and bars unlicensed contractors from filing lien claims. The bill was held on the Special Appropriations Table over a funding gap, so confirm the position at the time you sign. If you are planning a roof for 2027 or later, ask any contractor you shortlist whether they intend to be licensed under it, because a contractor that will not be cannot lien your property, and one that will has told you something about how it plans to operate.
The code does apply even where licensing does not. The Maine Uniform Building and Energy Code must be adopted and enforced in municipalities of 4,000 residents or more, which covers Portland, South Portland, Westbrook, Scarborough, Biddeford, Saco and most of the metro. MUBEC runs on the 2015 IRC, which requires an ice barrier from the lowest roof edge to a point at least 24 inches inside the exterior wall line, extended to 36 inches measured along the slope on roofs of 8:12 or steeper. On the steep-pitched older stock common through Portland’s peninsula neighbourhoods that steeper rule frequently applies.
The weather record is mild by national standards and misleading if read alone. Nineteen hail reports and $719,000 of damage across a decade is nothing beside a Texas metro. But 219 severe wind reports is not nothing on an exposed coast, and the real load here is winter: snow accumulation, ice damming at eaves and valleys, and the freeze-thaw cycling that works water back under shingles. Specify the ice barrier, specify the ventilation, and treat any quote that skips both as incomplete.
The 2 best roofers in Portland, ME
Scored 2026-09-23. The metro mean rating used as the Bayesian prior for Portland is 4.9, across a pool of 2 certified contractors.
| Rank | Company | TRB Score | Certification | Rating (reviews) | Adjusted | In business since | Based in |
|---|---|---|---|---|---|---|---|
| 1 | B’s Roofing & Construction, LLC | 65.6 | Certified | 5.0 (60) | 4.955 | not published | Sanford, ME |
| 2 | Precision Roofing LLC | 62.4 | Certified | 4.8 (98) | 4.834 | not published | Springvale, ME |
1. B’s Roofing & Construction, LLC — TRB Score 65.6
B’s Roofing & Construction, LLC is based in Sanford, ME, BBB accredited since 20 November 2025, and holds Certified standing on the GAF certification registry.
| Score component | Points | Max |
|---|---|---|
| Certification tier | 12 | 35 |
| Adjusted rating | 38.2 | 40 |
| Review corpus depth | 13.4 | 15 |
| Metro proximity | 2.0 | 10 |
| Total | 65.6 | 100 |
Independently corroborated:
- BBB accredited since 20 November 2025. BBB
- Listed on HomeAdvisor with a review history. HomeAdvisor
- Roofing, framing, siding, general construction and finish work across southern Maine and New Hampshire. Company
What they actually do. Roofing, framing, siding and general construction across southern Maine and New Hampshire.
Why it ranks here. A clean 5.0 across 60 registry reviews. Framing and general construction alongside roofing matters in this market, because a tear-off on housing of this age routinely exposes rot in the deck and rafters, and a roofing-only contractor has to stop where that work starts.
Best fit for: York County homeowners, and roofs where structural repair is likely.
What we would want clarified. Thirty-two miles from Portland, base GAF certification, and accredited only since November 2025. Ask for the written contract the Home Construction Contract Act requires above $3,000, and confirm the municipal business licence for the town your property sits in. We publish this because a ranking that only prints the flattering findings is an advertisement, not an assessment.
Verify the certification yourself on the GAF registry listing. The number carried on that listing is (207) 502-0513, which is the registry’s contact line and is often a directory tracking number rather than the contractor’s own: take the number from the company’s own website and compare the two.
2. Precision Roofing LLC — TRB Score 62.4
Precision Roofing LLC is based in Springvale, ME, BBB accredited since 3 February 2017, A+ rating, and holds Certified standing on the GAF certification registry.
| Score component | Points | Max |
|---|---|---|
| Certification tier | 12 | 35 |
| Adjusted rating | 33.4 | 40 |
| Review corpus depth | 15.0 | 15 |
| Metro proximity | 2.0 | 10 |
| Total | 62.4 | 100 |
Independently corroborated:
- A+ rated and accredited since 3 February 2017, a 9-year record. BBB
- Profiled by WGME in its Inside Maine’s Best Home and Garden feature, covering York County. WGME
- Residential and commercial roofing in asphalt shingle, metal, rubber and copper. Company
What they actually do. Asphalt shingle, metal, rubber and copper roofing, residential and commercial.
Why it ranks here. Nine years of unbroken A+ accreditation, the only sustained third-party conduct record available anywhere in this metro’s certified pool, plus independent local television coverage. Copper and rubber alongside shingle is a genuinely broader capability than most of this market offers, and copper matters on the older Portland-area stock.
Best fit for: York County and southern metro homeowners, and metal, rubber or copper roofs.
What we would want clarified. Thirty-two miles from Portland on a bounded estimate, and base GAF certification. If neither contractor here suits you, widening the search into Portsmouth and Dover in New Hampshire is reasonable, but those firms sit 44 to 50 miles away and are ranked on their own metro pages. We publish this because a ranking that only prints the flattering findings is an advertisement, not an assessment.
Verify the certification yourself on the GAF registry listing. The number carried on that listing is (207) 247-2528, which is the registry’s contact line and is often a directory tracking number rather than the contractor’s own: take the number from the company’s own website and compare the two.
The 219 wind reports that shape a Portland, ME roof
Aggregate hail counts tell you very little about a specific roof. These are the individual events: every severe-weather report logged by the National Weather Service across the 3 counties of the Portland-South Portland, ME statistical area over ten years, with the dates, the stone sizes and the towns they landed on. Over that decade the metro logged 19 hail reports, 219 severe thunderstorm and high wind reports and 4 tornadoes. Reported property damage from hail, severe wind and tornado over that decade totalled $719,000; flood and winter-storm losses are counted separately and are not included.
The biggest hail to fall on Portland in a decade
| Date | Stone size | Reported near | County |
|---|---|---|---|
| 14 July 2020 | 1.5 in | Sanford | York |
| 20 July 2025 | 1.5 in | Falmouth | Cumberland |
| 21 July 2022 | 1.5 in | Steep Falls | Cumberland |
| 14 July 2020 | 1.25 in | York | York |
| 4 June 2022 | 1.0 in | Douglas Hill | Cumberland |
| 5 June 2024 | 1.0 in | Bridgton | Cumberland |
The largest stone on record for this metro fell on 14 July 2020 near Sanford, measured at 1.5 inches. That is ping-pong-ball sized, enough to bruise asphalt shingles and shorten a roof’s life without necessarily looking dramatic from the ground.
Wind. The strongest thunderstorm gust logged in the metro was 70 knots, about 81 mph, near South Windham on 20 July 2025. Asphalt shingles begin lifting at roughly 67 mph when they are correctly nailed, and considerably below that when they are not.
Tornadoes. 4 tornadoes touched down in these counties over the decade, the strongest rated EF1 near Bridgton on 1 July 2017.
What the National Weather Service wrote about it
The NWS logs a written account of each severe-weather episode. This is its description of the 20 July 2025 event near South Windham, reproduced verbatim:
Severe thunderstorm outflow winds downed multiple large trees down throughout the area, including partial ripping the roof off a home and damaging another as a tree fell on the home on South Windham.
That is the kind of damage a roof in this metro has to be specified against, described by the agency that recorded it rather than by a contractor selling the repair.
When it happens. Severe weather reports cluster in July (89), June (57), August (40). The worst years on record were 2016 (56), 2018 (40), 2020 (40). If you are scheduling non-urgent work in Portland, the months outside that window are when crews are least stretched and least likely to be triaging emergency callouts ahead of your job.
Source: NOAA National Centers for Environmental Information, Storm Events Database, county-level detail files 2016 to 2025, filtered to the counties of this statistical area by The Roofing Brief. Damage figures are as reported to the NWS and undercount insured losses.
What to do with this. Hail is not the governing risk in Portland. Weight your decision toward wind rating, ventilation and flashing detail rather than paying extra for impact-rated shingles.
What a Portland, ME homeowner should ask for in writing
There is no state roofing licence in ME. Maine does not license roofing contractors, or general contractors, at state level. There is no exam, no register and no state board with authority to discipline a roofer. What Maine does require is a written contract: under the Home Construction Contract Act any residential construction, remodelling or repair above $3,000 must be in writing and signed by both parties.
The written-contract rule is more useful than it sounds. It must specify the work, the materials, the price and the payment schedule, and a contractor who fails to provide one has committed a violation the Attorney General can act on. Contractors must also hold a business licence in the municipality where they work, so the town office is the register that does exist.
That absence is the most important fact on this page. Where a state issues no credential, a manufacturer certification that can be revoked is the only quality signal a homeowner can actually check, which is why this ranking is built on certification rather than star ratings.
Check here: Maine Attorney General, home construction and repair. This is about to change. LD 1226, the Maine Home Contractor Licensing Act, passed both chambers in June 2025 and is scheduled to take effect on 1 January 2027, creating a state licence for residential contractors on projects above $15,000, a Residential Construction Board to administer it, penalties of up to $10,000 for unlicensed work and a bar on unlicensed contractors filing lien claims. The bill was held on the Special Appropriations Table over a funding gap, so confirm the current position before relying on it. Until it commences, the municipal business licence and the written contract are the only formal protections a Maine homeowner has.
Four checks to run before you sign anything, in any state.
- Verify certification at the source. Use the GAF verification tool rather than trusting a badge image on a company website.
- Get the certificate of insurance from the insurer, not the contractor, and confirm general liability and workers compensation are both active on the day work starts.
- Confirm who pulls the permit. If a contractor asks you to pull it as the homeowner, that moves liability onto you. Decline.
- Get warranty terms in writing before any deposit, and check the manufacturer warranty being promised actually requires the certification tier the contractor holds.
Who else is certified in Portland, ME
2 certified roofing contractors serve the principal cities of the Portland-South Portland, ME statistical area, of which 0 hold the top President’s Club tier. The pool carries 158 customer reviews between them at a mean rating of 4.9. The statistical area had a 2024 population of 571,534, a change of 3.59% against the 2020 census base, per the U.S. Census Bureau Vintage 2024 estimates.
How these Portland, ME rankings were produced
Every contractor in the Portland-South Portland, ME pool was scored out of 100 on four published components: certification tier, a Bayesian adjusted rating, review depth and distance from the metro centre. In this metro that meant scoring 2 certified contractors, of whom 0 hold President’s Club standing and 0 Master Elite, against a metro mean rating of 4.9. The top two were then researched individually against Better Business Bureau records, state licence registers and manufacturer directories. Good and bad findings are published together, and no contractor paid for a place here.
The full method, the weightings, what the GAF certification tiers actually mean, who is eligible to be ranked and what we do not claim are all set out on our roofer ranking methodology page. Last updated: September 2026. Scoring run: 2026-09-23. Corrections go to the editor and are actioned on verification.
Questions Portland, ME homeowners ask
Who is the best roofer in Portland, ME?
B’s Roofing & Construction, LLC of Sanford, ME scores highest in the Portland metro on The Roofing Brief Contractor Score, at 65.6 out of 100 as of September 2026. It holds Certified certification with a 5.0 rating across 60 reviews. Highest-scoring is not the same as best fit for your specific job, and the company behind it scores within 3.2 points.
How many certified roofing contractors serve Portland?
2 contractors on the GAF certification registry serve the principal cities of the Portland-South Portland, ME statistical area as of September 2026, of which 0 hold President’s Club status.
How much damaging hail does Portland get?
The Portland-South Portland, ME statistical area recorded 18 hail reports of 1 inch or larger and 0 of 2 inches or larger between 2016 and 2025 in the NOAA Storm Events Database. The largest hailstone reported measured 1.5 inches.
Did any contractor pay to appear on this list?
No. The Roofing Brief takes no placement fees, no lead fees and no affiliate commission from any roofing contractor. Ranking comes entirely from the published formula applied to public registry data, followed by an individual research pass on the top two.
What was the worst hailstorm in Portland in the last ten years?
The largest hailstone logged by the National Weather Service in the Portland-South Portland, ME statistical area between 2016 and 2025 measured 1.5 inches, reported near Sanford on 14 July 2020. That is ping-pong-ball sized, enough to bruise asphalt shingles and shorten a roof’s life without necessarily looking dramatic from the ground. Across the decade the metro recorded 19 hail reports. Reported property damage from hail, severe wind and tornado over that decade totalled $719,000; flood and winter-storm losses are counted separately and are not included.
When is the worst time of year for roof damage in Portland?
Severe-weather reports in the Portland-South Portland, ME statistical area cluster in July, June, August, on the NOAA record for 2016 to 2025. Scheduling discretionary work away from that window tends to get you a better crew and a faster start, because nobody is juggling emergency callouts.
Do roofers need a licence in ME?
Maine does not license roofing contractors, or general contractors, at state level. There is no exam, no register and no state board with authority to discipline a roofer. What Maine does require is a written contract: under the Home Construction Contract Act any residential construction, remodelling or repair above $3,000 must be in writing and signed by both parties. The written-contract rule is more useful than it sounds. It must specify the work, the materials, the price and the payment schedule, and a contractor who fails to provide one has committed a violation the Attorney General can act on. Contractors must also hold a business licence in the municipality where they work, so the town office is the register that does exist.
What should I check before hiring a roofer in Portland?
This is about to change. LD 1226, the Maine Home Contractor Licensing Act, passed both chambers in June 2025 and is scheduled to take effect on 1 January 2027, creating a state licence for residential contractors on projects above $15,000, a Residential Construction Board to administer it, penalties of up to $10,000 for unlicensed work and a bar on unlicensed contractors filing lien claims. The bill was held on the Special Appropriations Table over a funding gap, so confirm the current position before relying on it. Until it commences, the municipal business licence and the written contract are the only formal protections a Maine homeowner has.
Is Portland a hard market to find a good roofer in?
This page ranks two contractors, and that is the finding. Greater Portland is Maine’s largest metropolitan area with 571,000 residents, and within forty miles of the city we could locate exactly two manufacturer-certified roofing contractors carrying enough public reviews to assess. Both are in the Sanford and Springvale area, 32 miles south. Portland itself has none on the register. That is not an accident of our method; it reflects a market of small independent roofers who have never joined a manufacturer certification programme, in a state that licenses no general or roofing contractors at all. From 1 January 2027 that changes, and the change is the most useful thing on this page.
Is wind or hail the bigger risk to a roof in Portland?
Wind, by a wide margin. The Portland-South Portland, ME statistical area logged 219 severe thunderstorm and high wind reports against 18 hail reports of an inch or more between 2016 and 2025. Wind damage shows up at the rake, ridge and edge rather than across the field of the roof, so the fastening schedule and edge detail matter more here than the impact rating of the shingle.
Roofer rankings for other metros
The Roofing Brief scores certified roofing contractors in the 400 largest U.S. metropolitan and micropolitan areas on the same formula.
- Best roofers in Manchester, NH, about 78 miles from Portland
- Best roofers in Boston, MA, about 99 miles from Portland
- Best roofers in Scranton, PA, a metro of comparable size
- Best roofers in Reno, NV, a metro of comparable size
See the full index of all 400 metro roofer rankings, or read how to find and vet a roofing contractor anywhere in the country.
Cite this analysis
The Roofing Brief. “Best Roofers in Portland, ME: The Roofing Brief Contractor Score.” Published September 2026. Inputs: GAF certification registry; NOAA Storm Events Database 2016-2025; U.S. Census Bureau Vintage 2024 population estimates; Better Business Bureau and independent review-platform records for each ranked contractor.