All surfaces should be smooth, dry and free of debris. Roofing felts are to be terminated at the top of the cant. Apply Koppers Flash-On 441 to seal the top edge of the cant and ply edges. M in place brushing all surfaces to ensure uniform adhesion. The method of installing plugs and fasteners is by pre-drilling when fastening to concrete or masonry.
Mechanical fasteners are permissible for attachment to wood.
Reference Flashing Specifications, Note No. 6. Install metal counterflashing. The mineral surfaced sheet must be installed vertically such that the selvage edge may be utilized for laps.