Tom M said:I could be mistaken but the safest way would be to mechanically attach a new base prior to top coating. Never know with surface bonding.
aamerasian67 said:Torchdown is a much better product than the lick em and stick em garbage. I've been roofing for almost 30 yrs and have put down literally thousands of rolls of torchdown. When done right its one of the best roofs out there
You're the first roofer I've heard say that. All the roofers I talk to now are advocating PVC for flat or low pitched roofs. Insurance companies like it better as well. Are you sure you're not just anal and stuck in your old ways?
LeeFowler said:While TPO and PVC are great, they aren't practical in this situation. The guy is working on a porch. Just buy a few rolls of liberty and you're set. The torch down has worked a long time, but it's okay to welcome new technologies.