Linway Inc. Pitch Gauge
Ready
Pitch
—
Longer by
—
Stand the phone on its edge against the rake

Hold still 2 seconds. It locks and buzzes.

Cut length · over a roof
—
Type the short side, tap a fraction
Gable · both ends get shorter going up
Left pitch
Right pitch
Take off left—
Take off right—
Next piece longest
—
Set both pitches and type the length
Peak · start both sides so they meet

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.