Scrim is a non woven material used for reinforcing roofing. It’s a relatively new product of technology, more effective than woven fibers. The fibers that make up roofing scrim are chemically bonded, and can be joined at a variety of angles, all adding to its strength and durability. Unlike the fibers on woven material, the fibers are not crimped. Scrim is a strong, and flexible material that can also be fire retardant. So, when you hear of the term ‘scrim’, associate that with a strong and resistant roof.