The Sustainability InstituteThe Sustainability Institute


The weatherization process for retrofitting selected homes consists of several stages that ensure resources are applied in a prioritized manner to have the greatest overall impact on reducing energy bills. As a first step after a home is selected, a certified Home Energy Rater performs an energy audit to determine where a building is leaking and what practices and investments will best achieve maximum effect in sealing the building’s envelope. Each building receives a score based on the Home Energy Rating System (HERS). The score is then interpreted by a certified professional and serves as a guide to direct ECC members in their weatherization priorities, allowing the team to develop a scope of work.


Before weatherizaion can begin on a home, an assessment and approval process must be performed.