Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2016
Mar. 01, 2017
Jul. 01, 2016
Document And Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Trading Symbol PGTI    
Entity Registrant Name PGT Innovations, Inc.    
Entity Central Index Key 0001354327    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   49,318,149  
Entity Public Float     $ 495,523,663