| Document and Entity Information | Dec. 10, 2019 |
| Cover [Abstract] | |
| Security Exchange Name | NYSE |
| Amendment Flag | true |
| Entity Central Index Key | 0001354327 |
| Document Type | 8-K/A |
| Document Period End Date | Dec. 10, 2019 |
| Entity Registrant Name | PGT Innovations, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-37971 |
| Entity Tax Identification Number | 20-0634715 |
| Entity Address, Address Line One | 1070 Technology Drive |
| Entity Address, City or Town | North Venice |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 34275 |
| City Area Code | 941 |
| Local Phone Number | 480-1600 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, Par Value $0.01 Per Share |
| Trading Symbol | PGTI |
| Entity Emerging Growth Company | false |
| Amendment Description | This Amendment No. 1 to Form 8-K (this “Amendment”) is being filed as an amendment to the Current Report on Form 8-K filed by PGT Innovations, Inc. (the “Company”) on December 10, 2019 (the “Original 8-K”). The Original 8-K was filed to, among other things, announce the Acquisition (as defined below). The sole purpose of this Amendment is to provide additional disclosure regarding the acquisition, including contingent payments that could be made to certain employees of NewSouth (as defined below). |
