03-12-2010, 04:39 AM
I have used Firestone Ultraply TPO roofing membrane on four homes I have built in Puna which are on catchment. It has a very low leachate rate especially compared to EPDM rubber. It may also comply with the new energy code which will take effect in March 2010. This will require all roofs to be insulated or comply with a cool roof requirement. Using this roofing could save the cost of insulating your roof structure.