| 摘要 |
A laminated shingle resistant to fastener-head pull-through. The shingle includes an upper layer having a tab portion and a headlap portion, and a shim extending below the tab portion and part of the headlap portion. The part of the shim behind the tab portion forms, with the headlap portion, a dual thickness nailing zone. Since roofers sometimes drive fasteners such as roofing nails through the shingle behind the nailing zone, resulting in only a single layer available to resist fastener-head pull-through, a reinforcing tape which can have reinforcing strands is adhered to the bottom of the headlap portion immediately behind the rear edge of the shim. This effectively increases the size of the nailing zone without incurring the bulk, weight and cost of increasing the size of the shim.
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