Insulation
Spray foam and insulation installation in Maine and New Hampshire.
The right insulation, in the right places, installed right. Every job starts with data from our energy audit — so you only pay for what actually helps.
Insulation Types We Install
Spray Foam
Closed-cell and open-cell options. Seals and insulates in one step — ideal for rim joists, crawl spaces, and complex geometries.
Dense-Pack Cellulose
Made from recycled paper, treated for fire and pest resistance. Excellent for walls and enclosed cavities. Dense packing fills every gap.
Fiberglass
Batts and blown-in fiberglass for attics and open cavities. Cost-effective, especially with proper air sealing underneath.
Mineral Wool
Fire-resistant, moisture-resistant, and excellent for soundproofing. Great for basements, headers, and areas needing fire protection.
Where We Insulate
Choosing the Right Material
Every insulation material has strengths and best applications. Spray foam is great for sealing and insulating tight spaces. Cellulose is ideal for dense-packing walls. Fiberglass works well in open attics.
The wrong material in the wrong place wastes money. That's why every insulation job starts with an energy audit — the data tells us exactly what goes where.
We always do air sealing before insulating. After installation, we retest with a blower door to verify the improvement.
What happened after homeowners called us.
"They found air leaks we had no idea existed. Our heating bill dropped 30% that first winter. The crew was fast and clean — they left the place better than they found it."
Sarah M.
Portland, ME
"I expected to spend weeks dealing with rebate paperwork. They handled everything. The check showed up in six weeks. Couldn't have been easier."
David R.
Concord, NH
"We had three companies look at our drafty sunroom. SGH was the only one who actually tested it with a blower door. Night and day difference after the work."
Karen B.
Kennebunk, ME
Get In Touch
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Where We Work
Serving Southern Maine & New Hampshire
Based in Lebanon, Maine — your neighbors in energy efficiency.
Maine
Portland · South Portland · Scarborough · Saco · Biddeford · Kennebunk · Sanford · Lebanon · Berwick · Kittery · York · Gorham · Windham · Brunswick · Auburn · Lewiston
New Hampshire
Portsmouth · Exeter · Hampton · Dover · Rochester · Concord · Manchester · Nashua · Bedford · Londonderry
Don't see your town? (800) 625-5958 — we likely serve your area.
Ready to insulate your home the right way?
Get a free quote based on real audit data — not guesswork.