In fact, in the earlier part of the century, coal tar roofs were often used to cool buildings by allowing the intentional ponding of water on the coal tar surface of the roof for evaporation and cooling effect. Prior to the mid-to-late 1970s, almost all low-slope roofs were asphalt or coal tar built-up roofs. It is intended to provide a 'Best Practice' and shall not be construed in any manner to establish the legal standard of care required from licensed professionals. It is the intent to provide recommendations beyond the content of those standards, especially as they relate to integrating the roofing assembly into a total building enclosure and mechanical system design. This document relies on many other industry standards, which should also be consulted.

The purpose of this section is to provide design guidance for designing high-performance low- and steep-slope roof assemblies. To select, detail, and specify the most appropriate roof system for a project past experience with several of the available material options and an understanding of roof assembly materials and system options, and an understanding of roof design considerations is recommended.

Roof cricket