It’s an evolved version of asphalt roofing that creates a better seam and superior strength than traditional asphalt. Extremely durable and flexible. It expands and contracts as temperatures shift without losing its shape, making it less likely to crack and create leaks in cold weather. It’s also tear- resistant thanks to the combination of fiberglass and/or polyester reinforcement layers. In fact, Modified Bitumen has five layers of protection - it's one of the most trusted flat roofing systems used in the industry today.