What We Do | Grantham Roofing & Maintenance Roofing Services
Grantham Roofing & Maintenance offers a complete range of roofing services in Grantham and Henniker, Lyme, New London, Plymouth, Sugar Hill. Every job gets the same attention. Big or small.
Roof Replacement
Your roof replacement includes a full-system install: ice and water shield at eaves, valleys, and penetrations; synthetic underlayment across the entire deck; aluminum drip edge at rake and eave; starter strip with sealant; architectural shingles with 130+ mph wind rating; and continuous ridge vent for proper attic ventilation. We also install new pipe boots and vent flashing on every penetration.
Get a Free Quote →Roof Repair
We warranty every repair for 5 years. If the same area leaks again due to our workmanship, we come back free. That warranty is in writing and it means something because we're a local Grantham company. We're not disappearing.
Get a Free Quote →Storm Damage Repair
HAAG Certified Inspectors on staff for every storm damage assessment. We document per HAAG residential guidelines: hail hit density per test square, severity classification, functional vs. cosmetic damage distinction. Insurance adjusters trust HAAG methodology because it's the industry standard. Our supplementation process references FM 4473 hail ratings and manufacturer impact resistance specs when fighting for full replacement approval.
Get a Free Quote →New Roof Installation
For Grantham new builds, we recommend Tamko Heritage or Malarkey Vista AR for budget-conscious projects and Atlas Pinnacle Pristine with Scotchgard for algae-resistant performance. High-end builds get GAF Timberline HDZ or Owens Corning Duration STORM. Each carries different warranty tiers. We walk you through the comparison so you're choosing with real information, not marketing brochures.
Get a Free Quote →Metal Roofing
Metal roofing reflects solar heat instead of absorbing it. In New Hampshire, that means 15-25% lower cooling costs compared to dark asphalt shingles. The higher upfront cost pays for itself over the life of the roof. And the life of a metal roof is twice or three times longer than shingles.
Get a Free Quote →Shingle Roofing
GAF Timberline HDZ. The best-selling shingle in North America. With StrikeZone nailing area for consistent fastener placement. Class A fire rating per UL 790, Class 4 impact resistance per UL 2218 (when installed in the GAF Roof System), and Class H wind rating per ASTM D7158 (130 mph). We install Timberline in the full GAF system to qualify for Golden Pledge warranty: 25-year non-prorated workmanship plus 50-year materials with WindProven limited wind warranty (no max speed). That warranty is why we recommend GAF for most Grantham homes.
Get a Free Quote →Flat Roofing
Modified bitumen is the best choice for residential flat roofs and low-traffic commercial applications in Grantham. We torch-apply SBS-modified base and cap sheets in a two-ply system. Granulated cap sheet handles foot traffic and UV exposure. 15-20 year warranty.
Get a Free Quote →Commercial Roofing
For commercial kitchens and restaurants in Grantham, PVC membrane is the only option that resists animal fat and chemical exposure from rooftop grease exhaust. We install IB Roof Systems and Duro-Last PVC with heat-welded seams and custom accessories. Modified bitumen with SBS or APP polymer-modified asphalt for high-traffic commercial roofs. Two-ply systems with 20-year NDL (No Dollar Limit) warranties from Johns Manville or Firestone.
Get a Free Quote →Gutter Installation
We hang gutters with hidden hangers screwed into the rafter tails or fascia board every 24 inches max. No spike-and-ferrule, no exposed hardware. Proper pitch is 1/4" per 10 feet toward each downspout. Too flat and water sits. Too steep and it looks wrong.
Get a Free Quote →Roof Inspection
Our inspection covers the roof and the attic. From the attic, we check for daylight through the roof deck, moisture stains on rafters, mold on sheathing, and ventilation function. Problems in the attic often indicate roof issues that aren't visible from the surface.
Get a Free Quote →Emergency Roof Repair
Our trucks carry 20x30 reinforced tarps, 2x4 lumber, plywood sheets, pipe boots, ridge cap shingles, flashing stock, roofing cement, and neoprene screws. We show up ready to secure your roof, not ready to schedule a follow-up appointment.
Get a Free Quote →Skylight Installation
Skylight installation includes cutting the roof opening, framing a curb with doubled 2x lumber, installing the unit with factory sealant, and weaving the step flashing into the surrounding shingle courses. Interior work includes drywall framing and trim. We handle the full job in Grantham. Outside and inside.
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