The joint, or seam, is formed by placing one strip of roofing "b", Fig. 31 (a) and Fig. 31 (b), on the roof, and placing cleats "e" against the flange. These cleats are about 2 inches wide, are spaced about 12 inches apart and securely nailed. A second strip of roofing "c" is placed against these cleats, and the cleats, which are split at the top, as at "h", are bent down over both flanges as at "i" and "j". Over the tops of the cleats and flanges a cap "f" is placed, and is fastened by bolts "k", in Fig. 31(a) and Fig. 31 (b), that go through the cap and the flanges. Sometimes the cap is merely pressed by tongs, which indent the cap but do not perforate it, so as to hold it firmly to the flanges and cleats without being bolted.