Exhibit 16.1
June 11, 2021
Securities and Exchange Commission
100 F Street, N.E.
Washington, DC 20549
Commissioners:
We have read the statements made by Janus International Group, Inc. (formerly Juniper Industrial Holdings, Inc.), under Item 4.01 of its Form 8-K filed June 11, 2021. We agree with the statements concerning our Firm under Item 4.01, in which we were informed of our dismissal on June 7, 2021, effective immediately. We are not in a position to agree or disagree with other statements of Janus International Group, Inc. (formerly Juniper Industrial Holdings, Inc.) contained therein.
Very truly yours,
Marcum LLP
