Tickets to Rock Werchter 2018 are exclusively available from www.ticketmaster.be and www.proximusgoformusic.be. A combi festival ticket (valid from 5 July to 8 July) costs 238 euro (6.5 euro service charges and 1.5 euro mobility fee included).
Each e-festival ticket allows you to download one free e-train ticket for public transport (train/festival bus) in Belgium. More info on that can be found here.
Camping is not included. If you wish to stay on one of the festival's campsites, you'll need to purchase a camping ticket as well.