The honest assessment
Metal roof repair and coating in New Hampshire
Metal roofs fail at their details, not their panels. A leak on a New Hampshire metal roof almost always traces to a fastener, a flashing, or a seam under stress from snow and freeze-thaw, and most of those have real repairs well short of replacement. A metal roof coating is a separate decision: it renews a tired finish on a sound roof and it closes no leak. Granite State Metal Roofing connects homeowners statewide with independent local professionals who fix and recoat metal instead of only selling new metal.
What actually goes wrong on a metal roof
- Fastener back-out. Exposed-fastener roofs live and die by thousands of gasketed screws. Thermal cycling works them loose, gaskets age, and each one becomes a slow drip. Re-fastening with oversized screws and fresh gaskets is the classic repair; wallowed-out holes across the field mean the conversation changes.
- Flashing failures. Chimneys, skylights, pipe boots, sidewalls, and valleys. UV-cracked pipe boots and pulled sidewall flashing cause a large share of "mystery" leaks, and each is a component-level fix.
- Snow and ice damage. Sliding slabs bend eave trim, tear off gutters, and rip out undersized snow guards. The repair includes asking why the layout let it happen; see snow guards and ice dam protection.
- Seam and panel damage. A dropped limb, foot traffic in the wrong spot, or an opened mechanical seam. Individual panels can be replaced and seams re-locked by someone with the referral profile and tools.
- Surface corrosion. Scratches through the finish, cut edges, and dissimilar-metal contact points. Caught early this is touch-up and isolation work, not panels.
Metal roof repair or replacement: the honest line
A useful rule: component problems get repaired, system problems get replaced. One boot, one bent eave, one panel, a dozen backing-out screws: repair. Field-wide fastener holes gone oval, finish failure across whole slopes, or chronic leaks on an undersized system carrying real snow load: start pricing replacement, because repair money spent there buys months, not years. A metal roof inspection is what settles which side you are on, and the replacement side of that math is at metal roof replacement, with statewide cost ranges in the NH metal roof cost guide.
Either way, the vetting is the same as any roof contract in this state: written scope, insurance certificate from the insurer, and references. New Hampshire has no roofing license to check, so the checking is yours; the New Hampshire Metal Roofing Guide carries the full checklist.
When is a metal roof coating the right call?
When the panels are sound and only the finish is tired. A metal roof coating, often sold as metal roof restoration, is paint applied in the field over a roof that is already up there. It renews color and surface. It does not close a leak path, it does not rebuild a wallowed-out fastener hole, and it adds no structure, so a coating bought to stop a leak is paint over a failure.
There is a question that comes before the paint quote: is the roof still inside its factory finish warranty? Those warranties run long and they measure fade and chalk rather than judging them by eye. Sheffield Metals publishes its paint warranty terms as 40 years on film adhesion and 30 years each on fade and chalk for both its PVDF and its SMP systems, with PVDF held to five Hunter delta-E units of color change and a chalk rating of eight, and SMP to seven Hunter units on roofs and a chalk rating of six (read 2026-08-19; warranty terms are a manufacturer's own and do change). A roof chalking inside terms like those is a warranty conversation first and a paint job second.
How much does it cost to coat a metal roof?
This site does not publish a coating price, and the reason is plain: the national guides it cites price a full standing seam replacement, not a recoat, so quoting them here would be borrowing the wrong number. What moves a coating price is the square footage, the panel profile, how much surface preparation the old finish needs, and which product goes on.
The comparison that actually decides it is the recoat against the replacement, and the sourced replacement spread is in the NH metal roof cost guide. For the coating figure itself, the honest route is written quotes from independent local metal roofing professionals, which is the free quote this site exists to make.
What is the best coating to put on a metal roof?
There is no single best product, and the split that matters is factory finish against field coating. The finish on an architectural metal panel is applied to the coil before the panel is formed and written to a published specification. FGIA/AAMA 2605 is that specification: PPG states it is built on 70 percent PVDF fluoropolymer or FEVE resin, and that a coating meeting it must pass a 10-year South Florida exposure test with color fade of five delta E or less, a chalk resistance rating of eight or better, and gloss retention of 50 percent or better (read 2026-08-19).
A field coating on an existing roof is a different product entirely. PPG's page lists coil and extrusion families and addresses field application nowhere, so a recoat does not inherit those numbers and nobody should imply it does. The three questions worth asking a contractor are which product, what its written warranty covers, and what surface preparation the price includes. Finishes on a new roof are a different decision again, covered under metal roofing colors and systems.
Should you hire a professional to paint a metal roof?
For most New Hampshire roofs, yes, and the reason is the preparation and the pitch rather than the painting. Adhesion is decided by how the old finish is cleaned and prepared, not by what comes out of the sprayer; a metal roof is a fall-hazard surface even dry; and a field coating rolled onto a finish still inside its factory warranty can cost more than it saves. Granite State Metal Roofing performs no roofing work of any kind. It connects homeowners with independent local metal roofing professionals, free, and the coating is quoted and contracted entirely between you and that professional.
How do you tell if a roofer is being straight with you?
In New Hampshire you check paperwork, because there is no roofing license to check. That premise, and the state's own licensing source behind it, is set out in hiring a roofer in a no-license state. Three things do the checking instead: a written scope that names the product and the surface preparation, an insurance certificate sent to you by the insurer rather than handed over by the contractor, and one piece of paper most homeowners have never heard of.
That third item is the residential construction defect notice. RSA 359-G:7(I) says that on a purchase agreement or construction contract over $5,000 the contractor "shall provide written notice to the owner of the residence of the contractor's right to resolve alleged construction defects before a homeowner may commence litigation", that the notice must be conspicuous, and that it may sit inside the contract itself; 359-G:7(III) sets what it has to say, including the 60-day written notice before a suit (read 2026-08-19). A full re-roof clears $5,000 easily and a small recoat may not, so ask which side of the line the job sits on, then ask to see the notice. Its absence on a contract over the threshold is a paperwork question worth asking before signing, not legal advice from this page.
Where metal roof repair calls come from in New Hampshire
Everywhere, but three patterns repeat: aging exposed-fastener barn and ranch roofs around Concord and the farm towns, snow-damage calls from the White Mountains, and camp roofs in the Lakes Region that went unwatched all winter (seasonal owners have their own page: lake house and camp roofing).
The sourced facts on this page were read at their sources on 2026-08-19: PPG's page for what the FGIA/AAMA 2605 specification requires, Sheffield Metals for its own published PVDF and SMP paint warranty terms, and RSA 359-G for the residential construction defect notice. Manufacturer warranty terms change, so treat the Sheffield numbers as read on that date rather than as settled. No coating price appears anywhere on this page, because no source read here publishes one.