Roof over is the process of going over the existing roof system with new roof system. The work is completed by separating the 2 roof systems with a hard insulation board (usually ½” thick). The insulation is secure to deck. The next step is installing the new membrane and securing to insulation and/or deck. The new roof membrane will have new flashing detail on all transitions/penetrations. In most cases, the metal coping is re-used and re-installed at the end of project on all perimeter walls.
Lifespan: 8+ years