Department of Commerce (COMM) Chapter 63, which regulates energy conservation in multi-family residential (other than one- and two-family dwellings) and other commercial buildings, was created in May 1978 and became effective July 1, 1978. COMM Chapter 22, which regulates energy conservation measures in one- and two-family dwellings, was created in May 1978 and became effective December 1, 1978.
The 2000 IECC with Wisconsin amendments was implemented on July 1, 2002, as part of COMM 63 requirements. COMM 22 meets or exceeds 95 MEC requirements.
The State of Wisconsin officially adopted the 2006 International Codes for commerical buildings. The codes, with WI amendments, were implemented on March 1, 2008. Code changes are posted on the WI Department of Commerce website.
Prior to April 1, 2009, COMM 22 of the state-developed Uniform Dwelling Code (UDC) was applicable to 1 & 2 family dwellings, exceeding 1995 MEC requirements. (REScheck could be used when the code assignment is indicated to be "Wisconsin" in REScheck). Multi-family dwellings had to comply with the 2000 IECC (REScheck may be used when the 2000 IECC code assignment is indicated).
The state of Wisconsin implemented many changes to its Uniform Dwelling Code (UDC) for 1&2-family dwellings. Among them, changes were made to COMM 22 (beginning on page 66/102) of the UDC to incorporate the 2006 IECC with Wisconsin amendments. The changes became effective April 1, 2009.
Code change proposals from the Wisconsin Department of Commerce to update the Wisconsin Commercial Building Code (Comm 61-66) to reference several 2009 I-Codes were automatically adopted on July 1, 2011. These include updating Comm 63 – Energy Conservation to incorporate the 2009 IECC with Wisconsin amendments (including an additional air barrier requirement similar to that of the 2012 IECC). The changes will become effective September 1, 2011.
In June 2011, Gov. Scott Walker signed into law the state’s fiscal budget which included an amendment revising the update process for the Wisconsin Uniform Dwelling Code (UDC), including Comm 22 – Energy Conservation (currently based on the 2006 IECC). The amendment requires all UDC update proposals that add more than $1,000 in additional building costs to go through the full legislative process. Previously, all updates went through a regulatory process culminated by an administrative rule review conducted by a legislative committee.