Environment Matters

Updating the calculator

Building owners always are looking for ways to save money—and they do so even more during tough economic times. Roofing contractors know one way their customers can save money is to reduce a building's energy costs by increasing the amount of roof insulation. However, contractors often are unsure how to illustrate the potential savings to their customers.

To assist roofing contractors, in 2007, NRCA, the Polyisocyanurate Insulation Manufacturers Association and The Roofing Industry Alliance for Progress developed EnergyWise Roof Calculator Online. This online application offers an interactive, graphical method of constructing virtual roof assemblies to evaluate thermal efficiency and estimate energy costs.

EnergyWise Roof Calculator Online also provides minimum thermal requirements established by ASHRAE 90.1, "Energy Standard for New Buildings Except Low-Rise Residential Buildings."

In February, NRCA released an updated version of EnergyWise Roof Calculator Online.