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ASHRAE 189.1

In January, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Inc. published ASHRAE 189.1, "Standard for the Design of High-Performance Green Buildings." The standard provides minimum guidelines for high-performance green buildings' siting, design, construction and plan for operation. These guidelines contain some roofing-specific guidelines with which you should be familiar.


ASHRAE 189.1 is arranged into seven sections addressing requirements for site sustainability; water use efficiency; energy efficiency; indoor air quality; buildings' effects on the atmosphere, materials and resources; and construction and plans for operation.

Within each of these sections are mandatory requirements and specific additional requirements that can be achieved by either a prescriptive or performance option.