About Grade 1 Insulation
Built on quality and focused on performance, Grade 1 Insulation helps homeowners, builders, and contractors create more comfortable, efficient, and durable buildings across New Hampshire, Southern Maine, and Northern Massachusetts.
Built on Quality. Focused on Performance.
Insulation is one of the most important systems in a building.
At Grade 1 Insulation, we believe proper insulation is about more than filling cavities. The right system improves comfort, energy efficiency, moisture control, and long-term building performance.
Based in New Hampshire, we proudly serve homeowners, builders, and contractors throughout New Hampshire, Southern Maine, and Northern Massachusetts, including communities around Manchester, Concord, Nashua, Portsmouth, Dover, Southern Maine, and the Merrimack Valley.
Whether it is a custom home, production build, renovation, addition, or commercial project, our team is committed to quality workmanship, dependable scheduling, and honest communication from start to finish.
Serving Builders, Contractors & Homeowners
We understand the importance of keeping projects moving. Our goal is to make the insulation scope clear, scheduled, code-compliant, and professionally installed.
- Accurate and timely estimates
- Clear communication
- Reliable scheduling
- Clean, professional installations
- Code-compliant insulation systems
- Attention to detail on every project
What We Do
We provide complete insulation and air sealing services for residential and commercial construction. Our goal is simple: install the right insulation system for the building, the climate, and the budget.
Batt & Blown-In Insulation
Fiberglass batts and blown-in cellulose for walls, attics, ceilings, and framed assemblies.
Spray Foam Systems
Open cell and closed cell spray foam for high-performance insulation, air control, and hard-to-insulate areas.
Air Sealing & Envelope Details
Rim joists, garage common walls, basement and crawlspace insulation, and targeted air sealing that supports the whole system.
Hybrid & Project-Specific Solutions
Flash and batt systems, hybrid roof assemblies, new construction, renovations, additions, and commercial projects.
Experience You Can Trust
Our team brings hands-on field experience and a commitment to doing the job right the first time.
Building Science Focused
We understand how insulation, ventilation, air sealing, and moisture management work together to create a high-performing building envelope.
Local Knowledge
New England's climate presents unique challenges. We understand local building practices, energy codes, and systems that perform well in the region.
Quality Without Compromise
From small additions to large custom homes, we deliver work builders can rely on and homeowners can feel.
Our Mission
To provide dependable, high-quality insulation solutions that improve comfort, energy efficiency, and long-term building performance while building lasting relationships with homeowners, builders, and contractors throughout New England.
Ready to Start Your Project?
Whether you are building a new home, planning an addition, upgrading an existing property, or looking for a trusted insulation partner for your next project, Grade 1 Insulation is ready to help.