Wet materials shall not be dried and reused. Wetted membrane materials must be thoroughly evaluated to determine the effect on adhesion, lap seals or blister potential. Remove any such material if there is any possibility of failure. Conform strictly with the manufacturer's recommendations for installation. No ballasted roof systems permitted.
Systems composed of at least two plies, one of which can be a heavy base sheet, are preferred.
Emphasize that debris not be allowed to accumulate on roof during construction. All debris to be totally removed at completion of project. Note that curb heights must comply with manufacturer's requirements for warranty of roofing systems. Refer to paragraph 07501.4. No power or powder driven tools to be used unless approved for use by the Office of Facilities Planning and Development .