Janus International Group Annual report [Section 13 and 15(d), not S-K Item 405]

Profit Sharing Plan	12 Months Ended
Profit Sharing Plan	Dec. 28, 2024
Retirement Benefits [Abstract]
Profit Sharing Plan	Profit Sharing Plan The Company has one 401(k) plan for the years ended December 28, 2024, December 30, 2023 and December 31, 2022 covering substantially all U.S. employees of Janus International Group, Inc., Janus International Group, LLC, Betco, Inc., Noke, Inc., ASTA Industries, Inc., and Access Control Technologies, LLC. Eligible employees may contribute up to the limits established by applicable income tax regulations. The Company made employer matching contributions of approximately $2.1, $1.9 and $1.5 for the years ended December 28, 2024, December 30, 2023 and December 31, 2022, respectively.