Building Insulation & Weatherization

Upgrade your building’s insulation, seal cracks in the attic, and lock in savings.
building insulation
Improving your building’s envelope is a cost-effective way to cut energy bills and improve comfort in your business space.

With weatherization upgrades like insulation, air sealing, and weatherstripping, businesses can save money by reducing energy loss and improving occupant comfort.

For buildings under 8,000 square feet, the Sponsors of Mass Save offer incentives to upgrade insulation in attics and walls, and seal air leakage in attics. 

For buildings over 8,000 square feet and below 100,000 square feet, please use our custom express weatherization tool and custom project application

If your building is over 100,000 square feet, we offer incentives for custom weatherization projects

The below incentives are for buildings less than 8,000 square feet only.

Insulation Type Rebate Amount
Attic Insulation $0.08 per R-value added per square foot
Wall Insulation $0.12 per R-value added per square foot

Air Sealing Rebate Amount
Attic Air Sealing $88 per hour of air sealing work
(proportional to attic size, see application for details)
  1. Participate in a No-Cost Energy Assessment
    Contact your Mass Save Sponsor to schedule a no-cost energy assessment before installation. A qualified vendor will contact you to determine existing conditions at your facility and identify potential energy-saving measures during a site visit or virtual assessment. Recommended improvements will be installed by your qualified vendor.
  2. Apply for Weatherization Rebates

    Work with a licensed weatherization contractor to discuss your weatherization project and determine rebate eligibility. Upon completion of installation, apply for a rebate by submitting all required documentation by email to your Mass Save Sponsor.

    For customers of Berkshire Gas, Cape Light Compact, Liberty Utilities, or Unitil, notification and approval of the project is required prior to installation.

    Download & Email Rebate Form

Can’t find what you’re looking for? The Sponsors of Mass Save offer customized project support to help your business save energy and money and reduce greenhouse gas emissions.

For a full list of eligibility requirements, please reference the rebate form.

  • Facilities undertaking weatherization improvements must be 8,000 square feet or less.
  • Weatherization measures must be installed between July 1, 2022 and December 31, 2022. Completed application and required documentation must be submitted no later than February 28, 2023.
  • Offers valid only for commercial & industrial customers in Massachusetts where Berkshire Gas, Cape Light Compact, Eversource, Liberty Utilities, National Grid, or Unitil are the electric or gas Program Administrator.
    • For customers of Berkshire Gas, Cape Light Compact, Liberty Utilities, or Unitil territories, notification of project prior to installation is required. Please use the Find Your Sponsor tool for contact information.
  • Weatherization measures that have already received a rebate or incentive from a Mass Save Sponsor are not eligible.
  • Weatherization measures are limited to attic air sealing, attic insulation (including attic kneewall insulation), and exterior wall insulation. Basement insulation and air sealing are not eligible for rebates.
  • Mass Save Sponsors, at its discretion, may exclude projects in facilities with heating and cooling loads that are highly driven by ventilation requirements such as those incurred by food service or laboratory settings.
  • New construction projects are not eligible for this weatherization rebate.

Project installation may be subject to an onsite verification. See Terms & Conditions for full requirements. 

If your building is over 8,000 square feet, we offer incentives for custom weatherization projects

Related Rebates & Incentives

Gallo Ice Arena

Case Study: Gallo Ice Arena

With energy upgrades, including a tighter building envelope, the Gallo Ice Arena saved an estimated $34,694 in annual energy costs. In addition to energy savings, upgrades improved the ice surface, expanded skating opportunities, and improved rink aesthetics.

Download Case Study

Case Study: Hydroid, Inc.

Hydroid, a field-proven technology leader in advanced marine robotics and autonomous underwater vehicles, saved energy and reduced greenhouse gas emissions with high-performance building envelope upgrades and other high-efficiency equipment measures.

Download Case Study

Not Sure Where To Start?

If you’re looking for advice on how to save energy, the Sponsors of Mass Save offer energy assessments and guidance to support efficiency projects from start to finish.

Learn More