ROOFING SHINGLE SYSTEM AND SHINGLES FOR USE THEREIN

摘要

A roofing shingle is provided comprising a reduced-with headlap portion including headlap projections, a buttlap portion including buttlap projections, a lateral leading edge, and a lateral trailing edge, wherein the headlap projection nearest the lateral leading edge has an increased breadth. A roofing system is also provided comprising a multiplicity of courses of shingles of the invention, wherein a lateral trailing edge of a shingle in a single course overlaps (side-laps) an adjacent previously installed shingle, and wherein a shingle in a subsequent course provides a generally uniform overlap region over the headlap portions of a first and second adjacent shingle in the first course and an expanded overlap region over the second adjacent shingle, wherein the expanded overlap region is due to the increased breadth of the headlap projection nearest the lateral leading edge of the second adjacent shingle in the first course.

主权项

1. A roofing shingle comprising:
a headlap portion, a buttlap portion, a lateral leading edge, and a Lateral trailing edge; wherein said buttlap portion includes a plurality of buttlap projections extending away from the shingle defining a maximum buttlap width and a plurality of recessed horizontal buttlap portions; wherein each of said buttlap projections includes a horizontal edge defining a projected horizontal buttlap portion; wherein each said projected horizontal buttlap portion has a primary horizontal breadth that is about equal for each said projected horizontal buttlap portion, and is about equal to the breadth of at least one of said recessed horizontal buttlap portions; wherein said headlap portion includes a plurality of headlap projections extending away from the shingle defining a maximum headlap width and a plurality of recessed horizontal headlap portions; wherein each of said headlap projections includes a horizontal edge defining a projected horizontal headlap portion; wherein a first of said projected horizontal headlap portions is nearest to the lateral leading edge and has a breadth that is greater than the primary horizontal breadth, and wherein at least another of said projected horizontal headlap portions and at least one of said recessed horizontal headlap portions have a breadth that is about equal to the primary horizontal breadth; and wherein the maximum headlap width is less than the maximum buttlap width.