Roof drip edge construction, corner assemblies therefor and methods of making same

DETAILED DESCRIPTION Although a drip edge is provided in the prior art, no means of joining drip edge portions at an exterior juncture or an interior juncture of the roof decking, commonly referred to as hip corners and valley corners, respectively, is provided.
Conventional practice is to nip off the ends of the drip edge with metal shears near the corner of the roof as the drip edge will be obscured by the guttering.
As such, in the interest of saving time, the construction worker takes little care in nipping off the drip edge and thus the hip corner may have a gap of up to two inches between the ends of adjoining drip edge portions.
Similarly, a valley corner may have the ends of the drip edge cut substantially square with the drip edge flange abutted in the corner but with a wedge shaped discontinuity at the valley base.
In either case, although these gaps or discontinuities are typically filled with roofing cement or a plasticized mastic, water may still flow off the edge of the roof and travel behind the drip edge at these discontinuities causing alternating wetting and drying of the roof edge plate, the rafters and the roof decking thereby ultimately resulting in dry rot of these timbers.
Furthermore, with different pitches of the roof of various building constructions, cutting of the drip edge to make a precise mitered corner for each pitch is different, therefore building construction workers do not attempt to make a valley or hip corner when applying drip edge to the roof edge even though the same drip edge may be utilized on these building constructions having different pitches as the roof flange may flex relative to the drip flange as the shingle extension is a folded over portion of the roof flange folded back upon itself to the location of the drip flange.
Hence, a great need exists for pre-made fabricated corner assemblies for the drip edge of a pitched roof in a building construction that can be quickly placed in position, affixed to the roof decking or roof edge plate and thereafter overlapped at both ends with elongated straight sections of drip edge extending away therefrom along the roof edge plate