HIP AND RIDGE DETAILS

Intersecting roof surfaces at hips and ridges should be capped to ensure a weathertight joint. Site-made or factory assembled hip and ridge units may be used, but both types must have alternate overlaps and concealed nailing (Figure 9). Weather exposures should be the same as the field of the roof. Nails must be longer than those used on the field of the roof and of sufficent length to penetrate 1/2" (12.7 mm) into or completely through the sheathing.

ROOF JUNCTURE DETAILS

Correct construction of roof junctures is vital to ensure weather tightness. In the following cases, where metal flashing is employed, it should be no less than 26 gauge galvanized steel (or acceptable equivalent). It should be painted on both sides with a good metal or bituminous paint. Flashing materials should be painted after bending to maintain the integrity of the coating.

Convex Juncture

On this type of Juncture (Figure 10) metal flashings should be installed to cover the top 4" (101.6 mm) of the wall and the bottom 8" (203.2 mm) of the roof slope before the final course of shingles or shakes is nailed to the top of the wall. A narrow band of shingles or shakes-or a strip of wood molding should be applied horizontally after the final wall course is installed. A double or triple starter course is then applied at the eave, with a 1 1/2"(38.1 mm) overhang of the wall surface. The roof can then be completed in the normal manner.