Built-Up roof systems are an asphalt based roof system that involves building up layers of asphalt roofing. Traditionally this was done by using a torch-down method where a propane torch was used to adhere the asphalt sheets to the roof. The City of Pittsburgh has since banned the use of torches on a roof due to the inherent fire hazard. Now we offer a built-up roof system that uses a cold-application process for installation, no more torches. Call us today for an estimate on a cold-applied asphalt roofing system.