LAMINATED SHINGLE

摘要

Laminated shingles (10) are manufactured from roll stock roofing material (80) that is wider than that used to make similar laminated shingles. The roll stock (80) includes longitudinal edge strips (82) having a reduced thickness and is cut into strips of tabbed top sheets (104 and 106) and backing sheets (96 and 98). The backing sheets (96, 98) are at once wider than commonly used in the industry. Because the backing sheet (52) is wider, two rain seal strips (58 and 60) are laid down on the backing sheet (52) prior to being laminated to the tabbed top sheet (54). The backing sheet (52) is laminated to the tabbed top sheet (54) with the longitudinal edges aligned. The wider backing sheet (52) provides a substantially wider nail zone (Z') and more protection against leakage due to the second rain seal strip (60). The portion of the backing sheet (70) that includes the added width is relatively thinner than the remaining portion of the sheet. Paired shingles may therefore be oriented adjacent one another in opposite directions and stacked and bundled. The total thickness of the stack will be the same throughout the stack, so the stack of shingles is flat.