Laminated shingle with wider nailing zone

Abstract

A multiple-layer laminated shingle and a method of making the shingle are provided, in which at least one adhesive of high temperature resistance is applied for securing the shingle layers together, to reduce reliance on a roofer having to fasten (via nails, staples or the like) through a narrow headlap zone of a posterior shingle layer in order to secure the posterior shingle layer to a roof, such that a vertically wide portion of the headlap area of the anterior shingle layer is presented to the roofer as a nailing zone.

Description

[0001] Laminated shingles are known in the art to be made from asphaltic roofing material overlaid upon one another, and secured together by means of an adhesive to provide a shingle having a thicker section. The anterior layer of the shingle has alternating tabs and cut out portions in the form of slots of various dimension in the lower end of the shingle, and an upper end of the shingle that is not divided into tabs. The posterior shingle layer, often called a backing sheet is applied, generally to the rear surface of the lower end of the anterior shingle layer, covering the rear surfaces of the tabs, such that the two shingle layers are not coextensive in area.[0002] In applying the shingles to a roof, by means of fasteners such as nails, staples or the like in accordance with the teachings of the prior art, there is a longitudinal strip of double thickness through which the nails, staples or the like fasteners must be applied, in which they will pass through both shingle layers,...

AI Technical Summary

Benefits of technology

[0014] It is yet another object of this invention to provide a laminated shingle having a wide nailing zone, without having a wide double-layer nailing zone, by using a high temperature softening point adhesive or an adhesive that does not soften at high temperatures or an adhesive having a high shear modulus, to secure the layers of the laminated shingle together, such that it is no longer necessary to nail the shingle through both layers of the laminate in order to retain the posterior layer on a roof.

Problems solved by technology

Professional roofers find this width too narrow, as it interferes with efficient fastening of shingles to a roof, slowing down the speed of shingle application.

Where laminated shingles have a common bond area that is too narrow, such as 1 inch or less, there can be a tendency for roofers to fail to apply the nail or staple fasteners into the common bond area, but to apply their fasteners above the common bond area, such that the fasteners pass through only the anterior shingle layer, and do not intercept the upper portion of the posterior shingle layer.

With such softening of the bitumen-based adhesive, there leaves the possibility, especially for roofs of steeper pitch or slope, that the posterior shingle layer of any given shingle, if the fasteners have not penetrated such posterior layer when the shingle was applied to the roof, the posterior shingle layer, under its own weight, may overcome the adhesive quality and deformation resistance of the softening bitumen, and slide out beneath the anterior shingle layer, at least compromising the quality of the roof.

Images