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49 Years
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Expert Asphalt Paving Services in New Hampshire
GMI Asphalt has been a trusted leader in asphalt paving since 1977, combining over 55 years of industry experience with a commitment to quality and customer satisfaction. Our team specializes in residential and commercial paving, grading, excavation, and decorative asphalt solutions, serving clients across New Hampshire and beyond. We prioritize transparency, offering materials lien waivers and guaranteed workers' compensation coverage to protect our clients.

With offices in Belmont, NH, and an asphalt plant in Franklin, NH, we deliver timely, cost-effective services supported by a fleet of modern equipment and OSHA-certified professionals. Our dedication to excellence is reflected in our 1-year workmanship warranty and recognition as a Best Paving Company by local publications.
Services
Asphalt Paving Seal Coating Excavation Decorative Asphalt Grading
Details
  • Year established: 1977
Highlights and features
  • We offer 55+ years of combined asphalt paving experience.
  • Our materials payment guarantee protects property owners from liens.
  • We guarantee workers' compensation coverage for all employees.
  • Our field superintendents provide 24/7 project support.
  • We serve New Hampshire, Maine, Massachusetts, and Rhode Island.
Associations and certifications
  • OSHA
What people say
Unmatched professionalism Completed quickly Excellent workmanship TRUE PROFESSIONALS No complaints
Services
Asphalt Paving
GMI Asphalt delivers durable asphalt paving solutions for residential driveways and commercial parking lots. Our process includes precise grading, base preparation, and compaction to ensure longevity. Clients benefit from our 55+ years of experience and 1-year workmanship warranty.
Seal Coating
Protect your asphalt investment with our seal coating services. We apply high-quality sealants to prevent weather damage and extend pavement lifespan. This service includes drainage solutions to mitigate water runoff issues.
Excavation
Our excavation teams handle projects of all sizes, specializing in drainage systems and site preparation. Services include lot clearing, underground drainage installation, and frost-level trenching to support long-lasting asphalt surfaces.
Decorative Asphalt
Enhance aesthetics with StreetPrint decorative asphalt. We offer custom patterns and colors for driveways, crosswalks, and parking lots. This cost-effective solution combines visual appeal with the durability of traditional asphalt.
Grading
Proper grading ensures optimal drainage and pavement performance. Our crews use precision equipment to create stable foundations, addressing water runoff challenges in New Hampshire's terrain for both residential and commercial sites.
People
Warren Colby
Owner/General Manager
Warren Colby leads GMI Asphalt with over four decades of industry experience. He emphasizes client protection through guaranteed materials payments and workers' compensation, ensuring peace of mind for property owners across New England.
Questions
What paving services does GMI Asphalt offer?
We provide residential/commercial asphalt paving, seal coating, excavation, decorative asphalt (StreetPrint), grading, and drainage solutions.
Do you serve areas outside New Hampshire?
Yes, we operate throughout New England, including Maine, Massachusetts, and Rhode Island.
Are emergency paving services available?
Yes, our crews provide 24/7 support for urgent paving and snow removal needs.
How does GMI protect property owners financially?
We include materials lien waivers and guarantee workers' compensation coverage to prevent owner liability.
What warranties do you offer?
We provide a 1-year warranty covering workmanship and materials for all paving projects.
Can you handle large-scale commercial projects?
Yes, our teams work day/night to meet deadlines for commercial developments across New England.
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