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...http://www.google.es/patents/US20040083674?utm_source=gb-gplus-sharePatente US20040083674 - Laminated shingle with wider nailing zone
