Roofing shingles with reduced usage of conventional shingle material and having a combination vertical and lateral lap extension

摘要

A roofing shingle includes a shingle body having a buttlap portion with a butt edge and a headlap portion with a head edge, a first side edge and a second side edge. An exposure zone extends from the butt edge toward the headlap portion and is configured to be exposed to the environment when the shingle is installed on a roof. A water impermeable sheet is attached to the shingle body and has a width, length, first end and second end. The width extends from between about the butt and head edges to beyond the head edge of the shingle body. The length extends from between about the first and second side edges to beyond the first side edge. The sheet is formed from a different material than the shingle body.

主权项

1. A roofing shingle, comprising:
a shingle body comprising a buttlap portion with a butt edge and a headlap portion with a head edge, a first side edge and a second side edge, an exposure zone extends from the butt edge toward the headlap portion and is configured to be exposed to the environment when the shingle is installed on a roof, and the shingle body comprises an asphaltic or bituminous material; and a water impermeable sheet (WIS) permanently attached to the shingle body prior to installation of the roofing shingle on a roof, the WIS having a width, length, first end and second end, the width extends from between about the butt and head edges to beyond the head edge of the shingle body to define a headlap, the length extends from between about the first and second side edges to beyond the first side edge to define a sidelap, a lower edge of the WIS is offset from the butt edge of the shingle body such that the WIS width is less than a total width of the shingle body, and the WIS comprises a polymer.