TPO roof

Yes TPO is glued down. TPO has been around longer than EPDM. It was originally formulated by Firestone and has been licensed to other manufacturers. There are several advantages to TPO over EPDM. First it is more tear resistant...second can be repaired to never come apart where EPDM can not....its life is generally longer than EPDM....it does not sluff off like EPDM causing fewer black streaks and is easily cleaned where as EPDM should NEVER be scrubbed or treated as petro chemicals shorted EPDM life. Both materials were invented as a commercial roof membrane. When TPO seams are glued they fuse just like pvc plumbing fittings....EPDM does not and relies on the flexible adhesive to maintain the joint. Back in 06 and 07 there were TPO problems and leaks. It was a two fold problem...improper install and the felt backing that was applied by the membrane material manufacturer was too wide. This was taken care of in 08. I had a unit that had to have a total roof replacement because of the problem and it was paid for by the manufacturer not a penny by me. I have had more than one of both TPO and EPDM roofs and prefer TPO. Being in construction I have seen these for years and TPO is far superior IMHO