This section contains two parts. The first part contains summary charts, by membrane type, of UL 790 (External Fire Resistance) constructions. Because of the scope of the Johns Manville product line, it is very difficult to include all constructions with total accuracy in a table form. After finding a general system in the table, the user should check the actual listings to verify the exact construction.
The second part of this section is a link to the actual Underwriters Laboratories site which will display the Johns Manville External Fire Resistance listings (TGFU). These listings are updated by Underwriters Laboratories on a daily basis. Listings for membranes are displayed in the following order: BUR, SBS, APP, EPDM, PVC and TPO. If you are looking for APP or EPDM scroll about halfway down the document. You can also choose Edit-Find (on this page), from the menu bar on top of the screen and type in the membrane type you are searching for.
