Keep this guide on your desk as part of your essential reference library, or carry it in the field to aid in explaining your findings to others. Just like the 1st Edition, Haag’s 2nd Edition Composition Field Guide is written by expert Haag Engineers to help you identify and differentiate common conditions found in field (from manufacturing, installation and weathering anomalies, to hail, wind and mechanical damage). And, it’s designed to be an easy, durable, on-the-go reference featuring large, color photos with detailed explanatory captions. Written by Haag Engineering.