Building a new home in Massachusetts? Our certified HERS Raters share the top strategies for energy-efficient construction that meets or exceeds the MA Stretch Code 2021.
RESNET HERS Rater vs BPI Building Analyst — what is the difference and which certification does Massachusetts require for new construction energy code compliance?
What does your HERS score mean? Learn how the HERS Index works, what score you need for MA Stretch Code compliance, and how to lower your score.
What is the difference between the MA Stretch Code and the base energy code in Massachusetts? Learn which applies to your project and what extra requirements the Stretch Code adds.
Massachusetts is pushing toward net zero buildings. Learn what the MA Stretch Code, BERDO, and net zero requirements mean for new construction developers in 2026.
Complete guide to duct leakage testing in Massachusetts. MA Stretch Code 2021 requires 4 CFM25 per 100 sq ft. Learn cost, process, and what to do if you fail.
Does your Massachusetts ADU need a HERS Rating? Yes — learn what the MA Stretch Code 2021 requires for accessory dwelling units and how much it costs.
What energy code applies to new construction in Massachusetts in 2026? The MA Stretch Code 2021 is the standard. Here is what builders and developers need to know.
What happens if your Massachusetts home fails a blower door test? Learn the passing threshold, common failure causes, and how to fix air leakage before your retest.
Complete guide to blower door testing in Massachusetts. Learn what the test measures, what a passing result looks like under the MA Stretch Code, and how to prepare.
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At HERS Rating Company, we are committed to providing the highest quality energy consulting services to homebuilders, architects, and developers across Massachusetts.
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