Building a new home or adding on to your existing one? Grantham Roofing & Maintenance handles new roof installation from decking to ridge cap. We work with your general contractor or architect to coordinate scheduling, material selection, and code compliance for your Grantham build.
Our New Roof Installation Process
Plan Review & Consultation
We analyze your plans for pitch, square footage, ventilation needs, and code compliance. You get a detailed proposal with material specs, timeline, and fixed pricing before any work begins.
Preparation
All materials verified against your approved proposal. Color, brand, quantity, everything double-checked before install day. No substitutions without your approval.
Expert Installation
Installation follows IRC building code and manufacturer requirements. Proper overlap, correct fastener patterns, sealed penetrations, and balanced ventilation. Our crews are factory-trained and know the installation manuals by heart.
Final Inspection
After installation: quality inspection, building department sign-off, manufacturer warranty registration, and cleanup. Your new roof is warranted from the day it passes inspection.
What Grantham Customers Say
"Responded fast and got the job done right the first time. Crew was polite, professional, and cleaned up everything. Would absolutely hire again."
"Our neighbors recommended them and now we understand why. Meticulous attention to detail and they treated our home like it was their own."
"Best experience we've ever had with a home service company. On time, on budget, and the results exceeded what we expected. Truly top-notch."
Why Choose Grantham Roofing & Maintenance for New Roof Installation?
Material Selection Guidance
Shingles, metal, flat systems. We install all of them and help you choose based on your budget, design, and the demands of NH climate.
Ventilation Design
We calculate intake and exhaust per IRC R806 for every new install. Balanced ventilation extends roof life and cuts energy costs. Most contractors skip this step.
New Construction Specialists
We install new roofs on new builds every week. Our Grantham crews know the pace, the coordination, and the quality standards that new construction demands.
Code Compliance
Every installation meets IRC building code and local Grantham amendments. Proper underlayment, ice barrier, and fastener patterns documented for inspection.
About Our Grantham New Roof Installation Services
Whether it's GAF Timberline HDZ, Owens Corning Duration, CertainTeed Landmark, or a standing seam metal system, our Grantham crews install it the way the manufacturer requires. Factory-certified installation means your warranty is fully backed from day one.
We handle everything from permits through final inspection. Our Grantham office pulls the roofing permit, coordinates material delivery, schedules the crew, and arranges the building inspection. Your GC or project manager gets regular updates and we stay on schedule.