Manchester NH roof replacement permit rules
Manchester's Building Division requires a building permit for full roof replacements. Apply at manchesternh.gov. New Hampshire requires a Home Improvement Contractor (HIC) license — there is no separate state roofing contractor license; the HIC is the applicable credential. Verify at oplc.nh.gov. Call (603) 624-6450 for documentation requirements. The inspector will verify deck condition, ice and water shield, underlayment, flashing at penetrations and transitions, and shingle installation.
Ice and water shield is mandatory at Manchester roof eaves per New Hampshire's building code, extending from the eave edge to at least 24 inches inside the interior face of the exterior wall. Manchester's climate — cold inland winters with significant snowfall from nor'easter systems — produces the freeze-thaw conditions that drive ice dam formation. Verify explicitly that ice and water shield is in any contractor's quoted scope. On north-facing roof slopes and roofs with a history of ice dam damage, asking for 36-inch width past the wall line rather than the code minimum 24 inches provides additional protection.
Manchester's inland position in the Merrimack Valley means snow loads from nor'easter systems accumulate before wind redistribution, leading to higher roof loads than coastal cities. The ground snow load in the Manchester area is approximately 50 psf. Before a full reroof, confirm that the roof framing and sheathing are adequate. Deteriorated framing discovered at tear-off should be addressed as part of the permitted scope rather than deferred.
NHSaves (nhsaves.com) offers rebates for attic insulation and air sealing that are worth combining with a reroof project. Addressing attic heat loss — the root cause of ice dam formation — alongside the reroof is the most cost-effective approach. R-49–R-60 blown-in insulation with comprehensive air sealing before the insulation is installed reduces ice dam frequency more reliably than any roof product alone.
Three Manchester roof scenarios
| Factor | What it means for your project |
|---|---|
| Ice and water shield mandatory | NH code: eave edge to 24+ inches inside wall. 36 inches recommended on problem roofs. |
| ~50 psf ground snow load | Confirm framing adequacy before tear-off. |
| NH HIC license required | No separate NH roofing license. Verify HIC at oplc.nh.gov. |
| Attic air sealing = root cause | R-49–60 + air sealing reduces ice dams more than any roof product alone. |
| NHSaves insulation rebates | Combine with reroof. nhsaves.com. |
Phone: (603) 624-6450 | manchesternh.gov
NH HIC Licence: oplc.nh.gov
Eversource Energy (electric): 1-800-662-7764 | Liberty Utilities (gas): 1-800-545-5000
NHSaves (efficiency rebates): nhsaves.com
Common questions about Manchester, NH roof replacement permits
Is ice and water shield required for roof replacements in Manchester NH?
Yes. New Hampshire's building code requires ice and water shield at roof eaves extending from the eave edge to at least 24 inches inside the interior face of the exterior wall. Manchester's CZ6A climate produces regular ice dam conditions from nor'easter snowfall combined with freeze-thaw cycling. Verify ice and water shield is explicitly in any contractor's quoted scope before signing.
Does a roofing contractor need a license in Manchester NH?
New Hampshire requires a Home Improvement Contractor (HIC) license for residential home improvement work including roofing. There is no separate NH roofing contractor license — the HIC is the credential. Verify active HIC status at oplc.nh.gov. Check general liability and workers' compensation insurance before signing any contract.
Information based on Manchester, NH official sources and applicable state/local building codes as of April 2026. Codes and fees change — verify current requirements before starting work. For a project-specific report, use our permit research tool.