All surfaces should be smooth, dry and free of debris. Roofing felts are to be terminated at the top of the cant. Apply Koppers ONYX Modified Flashing Cement to seal the top edge of the cant and ply edges. Care shall be taken to eliminate all wrinkles and fishmouths. The method of installing plugs and fasteners is by pre-drilling when fastening to concrete or masonry.
Mechanical fasteners are permissible for attachment of flashing to wood.
Fastener heads should be sealed with an approved material. Reference Flashing Specifications, Note No. 6. Install metal counterflashing.