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This field guide to inspecting asphalt shingle roofs was developed to provide the user with a quick reference tool for use in evaluating comp shingle roofs. It’s designed to help in identifying a wide range of defective and correct conditions.

With over 170 high-resolution photographs, illustrations and diagrams, it covers flashing plus three-tab, laminated and T-lock shingles, including both organic and fiberglass. It covers shingle components,  problems due to aging, wear & tear, impact, abrasion, poor ventilation and improper installation.

Developed by Kenton Shepard, author of InterNACHI’s Certified Roof Inspector course (soon to be released).

***PDF is 36 MB in size, so allow some time for the download to occur.  We STRONGLY recommend that you do this on a high speed internet connection.  You will need Adobe Reader 7.0 or newer or a similar PDF reader.