Online calculator updated

November 21, 2013

National Roofing Contractors Association’s (NRCA’s) EnergyWise Roof Calculator Online now includes 2012 International Energy Conservation Code (IECC) and International Green Construction Code (IgCC) information. The updated online tool also now includes the new minimum long-term thermal resistance (LTTR) values for polyisocyanurate insulation. The calculator allows users to enter specific roof assembly information including area, climate region, heating appliance type, roof openings, and materials. Then, a report is generated including the estimated heating and cooling costs and minimum thermal requirements. The tool can be accessed at energywise.nrca.net.

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