GENERAL APPLICATION DETAILS

Shingle Application

Regardless of style, the following basic application details (Figure 4) must be observed.

1. Shingles must be doubled or tripled at all eaves.

2. Butts of the first course shingles should project 1 1/2" beyond the fascia.

 

3. Spacing between adjacant shingles (joints) should be a minimum of 1/4" (6.35 mm) and a maximum of 3/8" (9.525 mm).

4. Joints in any one course should be separated not less than 1 1/2" (38.1mm) from joints in adjacent courses; and in any three courses, no two joints should be in direct alignment.

5. In lesser grade shingles containing both flat and vertical grain, joints should not be aligned with centerline of heart.

6. Flat grain shingles wider than 8" (203.2mm) should be split in two before nailing. Knots and similar defects should be treated as the edge of the shingle and the joint in the course above placed 1 1/2" (38.1 mm) from the edge of the defect. (Figure 5)