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Arrowline Do It Yourself Measurement Guide

Step 3 Enlarged Diagram - Back to Measurement Guide - Step 5 Enlarged Diagram

Step 4 Calculating Slope

Calculate the pitch. The slope or pitch of a roof is the distance the roof rises vertically for each horizontal foot. The gable is the easiest place to take the measurement. From the corner edge measure 1 foot inwards. From that point measure the vertical distance to the edge of the roof. Using a square will keep your lines straight and at a right angle.

If your vertical measurement is 4 inches then your slope is 4:12. If your vertical measurement is 8 inches then your slope is 8:12. If your roof has sections with differing pitches, each slope value must be calculated and recorded.

Roof Sample Diagram

Enlarged Version of Calculating Slope Diagram