Pitch
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Longer by
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Stand the phone on its edge against the rake
Hold still 2 seconds. It locks and buzzes.
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Type the short side, tap a fraction
Left pitch
Right pitch
Take off left—
Take off right—
Next piece longest
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Set both pitches and type the length
Each side starts where its corner sits on the roof. The starter is the first piece's height at that corner.
Left pitch
Right pitch
Top course line below peak
Left starter—
Right starter—
Set both pitches and how far each corner is from the peak
Siding exposure 10 3/8″
Accuracy check
Measure, tap 1st. Turn the phone end for end on the same spot, measure again, tap 2nd. The average cancels the phone's own error.