Attached files

file filename
EX-99.1 - EX-99.1 - Summit Materials, Inc.sum-20210403_d2.htm
EX-95.1 - EX-95.1 - Summit Materials, Inc.exhibit95110q12021.htm
EX-32.4 - EX-32.4 - Summit Materials, Inc.ex32410q12021.htm
EX-32.3 - EX-32.3 - Summit Materials, Inc.ex32310q12021.htm
EX-32.1 - EX-32.1 - Summit Materials, Inc.ex32110q12021.htm
EX-31.4 - EX-31.4 - Summit Materials, Inc.ex31410q12021.htm
EX-31.3 - EX-31.3 - Summit Materials, Inc.ex31310q12021.htm
EX-31.2 - EX-31.2 - Summit Materials, Inc.ex31210q12021.htm
EX-31.1 - EX-31.1 - Summit Materials, Inc.ex31110q12021.htm
EX-10.3 - EX-10.3 - Summit Materials, Inc.ex10310q12021.htm
EX-10.2 - EX-10.2 - Summit Materials, Inc.ex10210q12021.htm
EX-10.1 - EX-10.1 - Summit Materials, Inc.ex10110q12021.htm
10-Q - 10-Q - Summit Materials, Inc.sum-20210403.htm

Exhibit 32.2
Certification
Pursuant to 18 U.S.C. Section 1350
As adopted pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002
In connection with the Quarterly Report of Summit Materials, Inc. (the “Company”) on Form 10-Q for the quarterly period ended April 3, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Brian J. Harris, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
(i)    The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and
(ii)    The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
Date: May 11, 2021
/s/ Brian J. Harris
Brian J. Harris
Chief Financial Officer
(Principal Financial Officer)