Roofing shingles with reduced usage of conventional shingle material and having top lap extension
US8898987B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Nov 2, 2032 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04D1/34
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.