The lead used for covering these should weigh about 6 lbs. per superficial foot. It has to a great extent been superseded by the use of slate and tile ridges.

Ridges on the apex of the roof are covered with lead laid over a wooden roll fixed to the ridge piece. This lead is dressed well into the angles under the roll, and laps over the slates on each side about 6 or 8 inches, according to the size of the slates. It is generally left without any fastening, being kept down by its weight and the grip it has upon the under side of the roll. It may, however, in exposed positions be further secured by either of the following methods: - (1) by securing the lead to the sides of the roll with lead-headed nails; (2) by sheet-lead ears soldered to the under side of the sheet and nailed to the boards on each side of the roll; (3) by straps or tingles (t,Fig. 479) of stout lead laid at intervals along the ridge over the slates, and secured to the top of the ridge by the spike which carries the roll. The ends of these straps are bent back and dressed down upon the extremities of the sheet lead covering the ridge, as shown in Fig. 479.

Hips, which are the salient angles formed by the meeting of two roof slopes (see Fig. 4 5 6), are covered with lead in the same way as ridges, except that, as the sheets have a tendency to slide down, they require to be nailed at the upper ends, the nails being covered by the lap of the sheet above.

Ridges And Hips 100372

Fig. 478.

Ridges And Hips 100373

Fig. 479.

The lead for covering hips varies from 18 to 2 0 inches in width, according to the inclination of the roof and the size of the slates.