The statewide hub
The New Hampshire Metal Roofing Guide
Everything a New Hampshire homeowner needs before taking a standing seam quote, on one page: snow loads by region, what metal actually does about ice dams, the lakes-region camp questions, lifespan economics, verified cost ranges, and how to check out a roofer in a state that issues no contractor license. Granite State Metal Roofing is a free referral service; every figure below carries its primary source.
How much snow does a New Hampshire roof have to carry?
From 50 pounds per square foot on the Seacoast to 120 in the highest White Mountain townships. The official reference is a CRREL engineering study, TR-02-6, Ground Snow Loads for New Hampshire, which sets a design value for every one of the state's 259 towns and adds 2.1 psf for every 100 feet of elevation above each town's reference elevation, up to 2,500 feet, above which a site-specific case study is still required. It is incorporated in practice through the New Hampshire State Building Code (RSA 155-A). The spread matters: a roof specified for Salem would be badly underbuilt for Berlin.
| Region | Ground snow load context | What it means |
|---|---|---|
| Seacoast (Portsmouth, Rye, Hampton, Exeter) | 50 psf | The state floor. Dover is 60 and Rochester 70. Wet, heavy snow and nor easter wind loading. |
| Southern tier (Salem, Nashua, Derry, Manchester) | 55 to 70 psf | Salem 55, Nashua 60, Derry 65, Manchester 70. Low for New Hampshire, high for most of the country. |
| Concord and the Lakes Region | 70 to 90 psf | Concord 70, Laconia and Meredith 80, Wolfeboro and Gilford 90. Lakeside exposure adds drifting. |
| Monadnock, the western hills and the Upper Valley | 70 to 90 psf | Keene 70, Hanover 75, Lebanon and Jaffrey 80, Claremont 85, Plainfield 90. Elevation adjusts within each town. |
| White Mountains and high Coos County | 75 to 115 psf, ceiling 120 | Littleton 75, Lincoln and Conway 95, Berlin 100, Jackson 115. The 120 psf state ceiling sits in the high unincorporated townships. |
Band verified against TR-02-6. For your town's exact figure, ask your building department or look it up in the report; we publish per-town numbers only where we can verify them.
Standing seam earns its keep against exactly this map. Smooth panels running eave to ridge shed snow rather than holding it, the concealed fasteners leave no penetration for meltwater to find, and heavier gauge panels and tighter clip spacing handle the mountain loads. The details live on the standing seam service page and, for the hardest sites, the high snow load mountain roofing page.
Do metal roofs stop ice dams?
They remove the ice dam's foundation, but they do not repeal the physics. Ice dams form when attic heat melts the snow blanket from below and the meltwater refreezes over the cold eaves; on asphalt, the pooled water backs up under shingles and into the house. A standing seam surface sheds most of the snow blanket before that cycle gets started, and what ice does form has no shingle edges to exploit.
What metal does not fix is the heat leak itself. A poorly insulated, poorly ventilated attic still melts snow, and shedding snow needs somewhere safe to go, which is why snow retention over entries is part of any honest design. Both halves are covered on the snow guards and ice dam protection page.
What about camps and lake houses?
Seasonal homes are a tenth of New Hampshire's housing stock: 10.4 percent of all units, with about 70 percent of them concentrated in Belknap, Carroll, Coos, and Grafton counties, per a NH Business Review analysis of Census data. A camp that sits empty from October to May cannot rely on someone noticing a leak, raking the roof, or clearing an ice dam. That is the strongest practical case for standing seam in the state: a roof that manages snow by itself and does not ask to be checked on. Owners planning from out of state have a dedicated page: lake house and camp roofing.
Is metal worth twice the price of asphalt?
Run it over 40 years instead of one purchase. Standing seam costs about 2x asphalt up front and typically serves 40 to 70 years (the Metal Roofing Alliance's range; State Farm's guidance says 40 to 80), while asphalt in this climate typically runs 15 to 30. One metal roof therefore replaces two or three asphalt roofs plus their tear-off and disposal costs, and it does its snow work the whole time. The honest comparison, including where asphalt still wins, is the standing seam vs asphalt guide. Homeowners replacing an existing roof should start at metal roof replacement.
What does a metal roof cost in New Hampshire?
National cost guides put standing seam at roughly $8 to $39 per square foot installed and disagree with each other by about a factor of four, so no tight statewide number is honest. Metal type drives most of the spread: This Old House puts steel at $4.59 to $8.55 per square foot and copper at $12.24 to $26.60. Lower cost metal systems (exposed-fastener panels) come in under standing seam and trade away the concealed-fastener advantages, though no guide checked here publishes a reliable installed figure for them. Pitch, complexity, tear-off, and panel gauge move every number. The full system-by-system breakdown with a worked example is the NH metal roof cost guide. One warning here: no tax credit or rebate applies. The federal 25C credit expired December 31, 2025, and NHSaves has no roofing rebate.
How do you vet a roofer when there is no license to check?
New Hampshire issues no contractor or roofing license and no contractor registration, full stop (the OPLC licenses electricians, plumbers, gas fitters, fuel oil, and mechanical trades only). So the homeowner runs the checks a license would have run: a written contract carrying the RSA 359-G dispute-resolution notice on jobs over $5,000, a certificate of insurance sent by the insurer, manufacturer system certification, lien waivers on larger jobs, and standing seam references. Each check is walked through in the NH roofer hiring guide. Once you are ready to talk to someone, we connect you with metal roofing installers in New Hampshire free, statewide.
Which pages to read next
Repair and maintenance questions route to metal roof repair; panel, gauge, and finish research routes to colors and systems. For regional specifics, start with the areas we cover most:
- Metal roofing in Manchester and Nashua
- Metal roofing in Concord
- Metal roofing in Seacoast
- Metal roofing in Lakes Region
- Metal roofing in Monadnock Region
- Metal roofing in Upper Valley
The owner decision checklist
- Confirm your ground snow load context with your town building department (TR-02-6 lists every town).
- Decide the goal: 40-plus-year roof, snow shedding, ice dam relief, or a low-maintenance seasonal home.
- Price standing seam against architectural asphalt over 40 years, not one purchase.
- Get at least two written, itemized quotes naming the panel system, gauge, and finish.
- Check the RSA 359-G notice on any contract over $5,000.
- Request a certificate of insurance directly from each bidder’s insurance agent.
- Ask who holds the manufacturer certification for the quoted system.
- Call a standing seam reference, not just a roofing reference.
- Plan snow retention over doorways, walkways, and meter locations at design time, not after.
- Keep every document: contract, warranty registrations, and paid invoices travel with the house.
All seven service pages hang off this hub: standing seam metal roofing, metal roof replacement, snow guards and ice dam protection, lake house and camp roofing, metal roof repair and coating, high snow load mountain roofing, metal roofing colors and systems.