Invention Grant
US08793955B2 Multi-layered shingle 有权
多层木瓦

Multi-layered shingle
Abstract:
A multi-layered shingle includes an underlay sheet having a longitudinally extending axis and a leading edge. The underlay sheet further defines a first layer and a second layer. The second layer is connected to the first layer along a first longitudinally extending fold line and folded against the first layer. An overlay sheet is bonded to the underlay sheet, and the first and second layers of the underlay sheet define multiple layers of a multi-layered shingle.
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