Flat and low-slope roofs are different animals. Picking the right membrane is the most important decision you will make for the building.
TPO
White single-ply membrane with excellent reflectivity. Very popular for new commercial construction. 20-30 year service life when properly installed.
EPDM
Black rubber single-ply membrane. Decades of proven performance, especially in larger commercial applications.
Modified bitumen
Asphalt-based membrane available in torch-applied or self-adhered formats. Strong choice for re-roofing over existing built-up systems.
Repair vs replace
Most flat roof failures are at penetrations or seams and are repairable. A full replacement is usually warranted when more than 25% of the membrane shows failure or saturation.


