Built on Roofs. The Grantham Roofing & Maintenance Story
We founded Grantham Roofing & Maintenance after spending years working for other roofing companies in New Hampshire. We knew we could do it better. Better communication, better craftsmanship, better customer experience. 12 years and 320+ roofs later, our customers agree.
We carry certifications from GAF, Owens Corning, and CertainTeed. The three biggest shingle manufacturers in the country. That means factory-trained crews and access to the best warranties in the industry. We didn't earn those overnight.
What separates us from the rest? We return phone calls. We show up when we say we will. We clean up when we're done. And we fix problems without making excuses. Sounds basic, but in this industry it's not.
Why Choose Grantham Roofing & Maintenance?
Trusted by homeowners and businesses across Grantham.
Insurance Claim Experts
HAAG certified inspection, Xactimate documentation, on-site adjuster meeting. We've handled hundreds of storm claims in Grantham and know how to get them approved.
12+ Years of Experience
We've been roofing Grantham homes and businesses for 12 years. That experience shows up in cleaner installs, better problem-solving, and fewer callbacks.
Financing Options
12-month same-as-cash and low-interest payment plans. A new roof is a big investment. We make it manageable without cutting corners on materials.
Manufacturer Certified
GAF Master Elite, Owens Corning Preferred, CertainTeed SELECT ShingleMaster. Triple-certified means you get the best warranties available from any manufacturer.