| Cover Page | Nov. 08, 2021 | Aug. 09, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Amendment Flag | false | |
| Document Period End Date | Nov. 8, 2021 | |
| Entity Registrant Name | Masonite International Corporation | |
| Entity Incorporation, State or Country Code | Z4 | |
| Entity File Number | 001-11796 | |
| Entity Tax Identification Number | 98-0377314 | |
| Entity Address, Address Line One | 2771 Rutherford Road | |
| Entity Address, City or Town | Concord | |
| Entity Address, State or Province | ON | |
| Entity Address, Postal Zip Code | L4K 2N6 | |
| Entity Address, Country | CA | |
| City Area Code | 800 | |
| Local Phone Number | 895-2723 | |
| Title of 12(b) Security | Common Stock (no par value) | |
| Trading Symbol | DOOR | |
| Security Exchange Name | NYSE | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0000893691 |
