Roofing shingles with reduced usage of conventional shingle material and having top lap extension

摘要

A roofing shingle has a shingle body with a butt edge, a headlap portion, a head edge, and first and second side edges. An exposure zone has a width that 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. The sheet has a width with upper and lower edges. The width extends from between about the butt and head edges to beyond the head edge of the shingle body. The width of the shingle body is such that a first distance between the head edge of the shingle body and the upper edge of the water impermeable sheet is equal to or greater than the width of the exposure zone. 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, a headlap portion with a head edge, a first side edge, a second side edge, an exposure zone has a width that 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 a fastening zone between the exposure zone and the head edge; and a water impermeable sheet (WIS) attached to the shingle body, the WIS having a WIS width with an upper edge and a lower edge, the WIS width extends from between about the butt and head edges to beyond the head edge of the shingle body, the width of the shingle body is such that a first distance between the head edge of the shingle body and the upper edge of the WIS is equal to or greater than the width of the exposure zone, a WIS length extends approximately between about the first and second side edges, the WIS is formed from a different material than the shingle body, and the WIS provides a top lapping structure that closes a shingled roof to water penetration; and the WIS comprises a structural element having a raised portion that extends upward from the WIS and is configured to provide a dam against moisture intrusion; and wherein the raised portion terminates below a plane coplanar with an upper surface of the shingle body.