v3.19.1
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2018
Mar. 07, 2019
Jun. 30, 2018
Document and Entity Information [Abstract]      
Entity Registrant Name Forterra, Inc.    
Entity Central Index Key 0001678463    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Well-known Seasoned User No    
Entity Voluntary Filer No    
Entity Current Reporting Status Yes    
Amendment Flag false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   64,205,604  
Entity Public Float     $ 183,714,000