The procedure of installing a new roof system.

(1) The process of recovering or replacing an existing roofing system or roof covering; (2) The practice of applying new roofing materials over existing roofing materials; (3) The process of re-covering or tearing-off and replacing an existing roof system; (4) Removing and replacing an existing roof system (as opposed to mere Recovering; also called Tear-off Replacement). See RECOVERING, ROOF RECOVER, REPLACEMENT and ROOF REPLACEMENT.

the practice or applying new roofing material over existing roofing materials.