v3.19.3
Document and Entity Information
Oct. 28, 2019
Cover [Abstract]  
Document Type 8-K/A
Amendment Flag false
Document Period End Date Oct. 28, 2019
Entity Registrant Name TREX COMPANY, INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-14649
Entity Tax Identification Number 54-1910453
Entity Address, Address Line One 160 Exeter Drive
Entity Address, City or Town Winchester
Entity Address, State or Province VA
Entity Address, Postal Zip Code 22603-8605
City Area Code 540
Local Phone Number 542-6300
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 0001069878
Title of 12(b) Security Common stock
Trading Symbol TREX
Security Exchange Name NYSE