Farnum Insulators has been making New Englanders more comfortable for over a decade.


We want to save you money, increase the value and comfort of your home, and create a healthier environment—inside and outside. We serve southern Vermont, New Hampshire and Massachusetts. We offer easy financing with excellent interest rates—visit our SERVICES page for more information.


Whole house solutions

Expertly installed cellulose and spray foam insulation, comprehensive air sealing, and diagnostic tools and expertise to identify problems.

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Interior Window Inserts

Indow windows — the perfect alternative to replacement windows. Save money, gain comfort, and reduce noise with Indow inserts.  

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