Insulation & Air Sealing

Get 75-100 percent off approved insulation and air sealing improvements.

An energy efficient expert assessing a home

Making air sealing and insulation upgrades are two of the most cost-effective ways to boost efficiency and save money.

Insulation and air sealing work hand in hand to save energy, money, and increase your comfort at home. Air sealing is usually the first step—eliminating leakage points in your home, like attics, basements, and between joists.

Benefits of insulation and air sealing improvements include:

Lowering heating and cooling costs by up to 15 percent
Decreasing drafts to improve comfort and humidity all year long
Minimizing outside noise for a quieter, more peaceful environment
Reducing the chance of ice dams—protecting your home from potential damage

The Sponsors of Mass Save also offer no-cost insulation and air sealing upgrades to income-eligible residents.

A graphic describing the benefits of home insulation

Call 866-527-SAVE (7283)

Enter your zip code and heating fuel type to find your path to energy savings. At any time, you can call 866-527-SAVE to speak to the lead vendor that serves your area.

Zip Code

Primary Heating Fuel

Customers must live in a 1- to 4-unit home
Eligibility for some rebates and incentives is based on findings from the Home Energy Assessment
Some restrictions apply, and offers are subject to change or cancellation
Financing is subject to approval from a participating lender
Other offers are also available for renters of 1- to 4-unit properties, landlords of 1- to 4-unit properties, and landlords of Multi-Family facilities with 5+ units

Related Rebates & Incentives

An energy efficient home in Massachusetts

Case Study: As Good as New

Instead of moving, Vance participated in a no-cost energy assessment to find ways to make his home more comfortable. By making insulation upgrades and installing two high-efficiency mini-split heat pumps and advanced power strips, he saved $632 annually in energy costs.

Case Study: Shelburne Falls Addition

To make a new addition more comfortable, Angel and her husband took advantage of incentives to increase the insulation levels, install a high-efficiency mini-split heat pump, add a new fan vent, and make LED lighting upgrades.