Peterborough, NH's Trusted Local Insulation Contractor

We provide spray foam and cellulose insulation services to homeowners in Peterborough NH and the surrounding Monadnock Region.

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What We Install in Peterborough NH Homes

Our insulation services cover both ends of the home: spray foam seals out moisture and drafts in basements and crawl spaces, and cellulose gets blown into the attic for full coverage. Each project is matched to what your home actually needs.

Spray Foam Insulation

We install spray foam in basements and crawl spaces, where it seals out moisture and delivers a high R-value per inch, with no mess left behind.
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Cellulose Insulation

For attics, cellulose is the right fit. Blown in from recycled materials, it fills cavities and covers the entire attic floor.

The Farnum Insulators Process

1

Get a Free Estimate

Everything starts with a free quote. Our estimator walks the property and shares what they find, with blower door and infrared testing available as a separate service.

2

We Build Your Insulation Plan

We take what our estimator sees during the visit and turn it into a plan built around your home's insulation needs, then walk you through it before anything is scheduled.

3

We Get to Work

While the work is underway, our crew keeps you updated, answers any questions you have, and cleans everything up before they go.

4

You'll Feel the Difference Fast

The work typically takes a few hours to a few days, and once the crew finishes, you'll notice a steadier home with fewer drafts.

See Our Recent Work

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Peterborough Homeowners, Your Estimate Awaits

You can't see the difference insulation makes, but you can feel it every day you're home. Find out what your home actually needs.
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What Sets Farnum Apart

Every project starts with an honest look at your home from our BPI-certified team, backed by two decades of experience serving the region.

Real Feedback From Real Homeowners

Discover why Farnum Insulators is the #1 top-rated insulation company in Southeastern VT & Southwestern NH!

Serving Peterborough and the Monadnock Region

We serve Peterborough, New Hampshire and neighboring Monadnock Region communities, including Jaffrey, Dublin, and Hancock. If your area isn't listed, contact us. We likely still cover it.
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From Our Insulation Blog

Stay updated with the latest news, expert tips, and trends in insulation.

Frequently Asked Questions

What's the real difference between spray foam and cellulose insulation for a Peterborough NH home?
Spray foam creates an airtight, moisture-resistant seal best suited to basements and crawl spaces. Cellulose covers attics more thoroughly. Many homes end up needing both.
What's the ideal R-value for a Peterborough NH home?
Energy Star puts the benchmark at R-49 to R-60 for attics and R-15 or higher for basement walls. We'll take a look at your home's current insulation during your free quote visit.
Do I need to be away from my Peterborough NH home during the spray foam work?
The areas we're treating and the product we're using are what matter here. We ventilate during and after installation and walk you through exactly what to expect during your free quote visit.
Will better insulation reduce what I pay for heating each month?
It depends on how much insulation is already there and where heat is being lost. Sealing the right areas tends to make your home noticeably more comfortable. We'll assess that during your free quote visit.