Overlying Shingle Courses

Overlying Shingle Courses

First, the crest height of the next course is marked on the first course 7 9/16 inches above the butt line.

Overlying Shingle Courses

Next, the centerline is marked.

Overlying Shingle Courses

With the wave crest of the template aligned to the course line and the next offset line registered to the centerline...

Overlying Shingle Courses

...the wave is marked lightly in pencil to indicate the overlying course alignment when the shingles are applied in the field.

Overlying Shingle Courses

Each successive course of shingles is butted up against the straightedge ...

Overlying Shingle Courses

... and sized narrower than the course below according to the layout marks on the straightedge.

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