Patent ID: 8898963

Claim:
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.