2021 Michigan Energy (Residential) Code

The Construction Code - Part 10. Energy (Residential) Code rules were filed with the Secretary of State on May 1, 2025, and will become effective on August 29, 2025. The rules adopted by reference the 2021 edition of the International Uniform Energy Code, with amendments, deletions, and additions deemed appropriate for use in Michigan. 

 The bureau will notify the public when each code's electronic and hard copy versions are available for purchase and update the code book information on our website, which links to the ICC for purchase. Below are some important changes that have been made to the code.

•   One important change is Table R402.1.3, ceiling R- values have increased to R-60 for zones 5 through 7.

Please reply to this email with any questions and concerns about these changes.  As always, MIACCA remains focused on bringing our members the latest industry news while doing our due diligence to protect it.