National Roofing Contractors Association’s (NRCA's) EnergyWise Roof Calculator Online has been updated to include information from the 2010 version of ASHRAE 90.1, "Energy Standard for Buildings Except Low-Rise Residential Buildings," the 2009 version of ASHRAE 189.1, "Standard for the Design of High-Performance Green Buildings" and the 2006 and 2009 versions of the International Code Council's International Energy Conservation Code (IECC).

National Roofing Contractors Association’s (NRCA's) EnergyWise Roof Calculator Online has been updated to include information from the 2010 version of ASHRAE 90.1, "Energy Standard for Buildings Except Low-Rise Residential Buildings," the 2009 version of ASHRAE 189.1, "Standard for the Design of High-Performance Green Buildings" and the 2006 and 2009 versions of the International Code Council's International Energy Conservation Code (IECC).

EnergyWise Roof Calculator Online is available for free on NRCA's website, www.nrca.net, and offers an interactive graphic method of constructing virtual roof assemblies to evaluate thermal efficiency. The application denotes minimum thermal insulation requirements established by ASHRAE Standard 90.1, ASHRAE Standard 189.1 and IECC. EnergyWise users also can determine whether a vapor retarder's placement is effective.

EnergyWise Roof Calculator Online is a user-friendly application that prompts users to enter specific roof assembly information, such as roof area, climatic region, heating appliance type and cost, roof openings and roofing materials to be used. Users then can generate a report summarizing the proposed roof assembly design, estimated heating and cooling costs, and required minimum thermal requirements. For more information about EnergyWise Roof Calculator Online, contact Joan P. Crowe, AIA, NRCA's director of technical services, at 800-323-9545, ext. 7576 or jcrowe@nrca.net.