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3-16. Shingle Roof

An asphalt-shingle roof begins with the application of a drip edge, followed by underlayment (felt) and eave flashing strips. Then, the first full shingle is inverted and nailed in place. Asphalt roofing comes in rolls (usually 3 feet wide), called rolled roofing; in rolled strips (usually 15 inches wide and 3 feet long); and as individual shingles. The type most commonly used is the flat strip, often called a strip shingle. The size of a square-butt strip shingle is 12 by 36 inches. This shingle should be laid 5 inches to the weather, meaning 7 inches of each course should be overlapped by the next higher course. There are various types of shingles. Figure 3-33 shows a butt shingle with three tabs.

Figure 3-33. Butt Shingle

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