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
I, Russell T. Tiejema, Executive Vice President and Chief Financial Officer of Masonite International Corporation (the "Company"), do hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
| 1. | The Quarterly Report on Form 10-Q of the Company for the quarter ended July 2, 2017 (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m); and |
| 2. | The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
| Date: | August 10, 2017 |
| /s/ | Russell T. Tiejema |
| Russell T. Tiejema | |
| Executive Vice President and Chief Financial Officer | |
| (Principal Financial Officer and Principal Accounting Officer) | |