How to install a flat roof with 2:12 roof pitch or less are required to install a rolled roof system. Legacy Roofing uses top quality products such as peel and stick rather than a torch down. Most Denver Roof companies will use cheap torch down material to make a higher profit. Legacy Roofing dedicates to all Colorado Homeowners that we will install a lifetime product just for brand name recognition. Referral’s are the base of our business ! Contact Legacy Roofing to install a flat roof.