How well three-tab shingles hold up over time depends to some degree on the patterns used to lay them. Although many customers prefer to see the cutouts aligned on the roof, this directs runoff into channels that erode the shingle surface.
There are four basic patterns to laying out three-tab shingles: straight-up method (A), half-pattern (B), 4-inch offset (C), and 5-inch offset (D). The 5-inch offset pattern provides the best all-around protection.
—Excerpted from JLC Field Guide to Residential Construction
, published by JLC Books (JLConline.com), a division of Hanley Wood, LLC.
A. Straight-Up Method
C. 4-Inch Offset
D. 5-Inch Offset
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