A free quote is the first step. Our estimator walks the property and gives you a clear assessment, with blower door and infrared testing offered separately.
Your plan comes from what we find during the walkthrough, matched to your home's age, construction, and insulation. We explain everything before booking.
As a certified Efficiency Vermont partner and Energy Efficiency Excellence Network contractor, we guide you through the rebate and financing paperwork.
After the work is done, many homeowners notice a more even, comfortable home and a lighter load on their heating system. Most projects are completed in a single day.





“Farnum insulated my 1820s home, starting with the basement, which now stays around 64°F—even during single-digit days. After roof insulation, my upstairs bedrooms are 4-6°F warmer, and the house heats up much faster. The crew was polite, efficient, and left everything spotless. I’ll definitely work with them again for future projects!”
“Financing and rebates are often important to many homeowners. Through it all, Farnum Insulators provided excellent support and service in all parts of the process.!”
“Great work! Hour home is super efficient now. Received nice check after service from VT Efficiency!!”
“Excellent job with the spray-foam insulation: thorough, efficient and neatly done. We appreciate the professionalism and high quality of workmanship provided throughout this job.”
“What a great company! They were fast, courteous and did a perfect job. I am so grateful they managed to fit me into their very busy schedule. It was a pleasure working with you, guys!”
“The Farnum crew did an excellent job of insulating my attic. They were professional; passionate about their work; mindful of my property; and cleaned up after themselves. I would HIGHLY recommend them!”
“Is there a way to give more stars?! Everything about working with them is great–start to finish. They are communicative, friendly, courteous, and professional. The quality of the work is top notch (there was a lot of carpentry involved, too, for my home). Everyone on the staff was a pleasure to work with. I wish I could hire them for all my home projects!”