Begin at the eaves to lay the roofing (Fig. 299). Always lay the roll of
patent roofing with the inside surface to the weather and in the same
direction that the boards run--not at right angles to them. Begin nailing
at the centre of the edges of the strips and work both ways to the
ends--never the reverse, as the roofing may become wrinkled, twisted, or
crooked. Always set caps even with the edge of the laps about two inches
apart between their centres.