The membrane can also be fastened or glued to the insulation layer.
The result is a thick, tough, seamless roof assembly that is highly resistant to damage.
It also comes without much of the mess, heat, and smell associated with installing BUR.
Barry Winiker / Getty Images
It comes in rolled sheets that are 3 feet wide and up to 36 feet long.
The sheets are rolled onto the roof atop a base sheet membrane.
There are also self-adhesive versions of modified bitumen that install in a peel-and-stick fashion.
KVDP/Wikimedia Commons/Public Domain
PhanuwatNandee / Getty Images
Nenov / Getty Images
