The Federal Energy Management Program (FEMP) provides acquisition guidance for cool roof products, which are an ENERGY STAR-qualified product category. Federal laws and requirements mandate that agencies meet these efficiency requirements in all procurement and acquisition actions that are not specifically exempted by law.
Most manufacturers display the ENERGY STAR label on complying models. For a model not displaying this label, check the manufacturer's literature to determine if it meets the efficiency requirements outlined by ENERGY STAR.
Meeting Efficiency Requirements for Federal Purchases
Visit the ENERGY STAR website for the most up-to-date coof roof product efficiency levels and product specification information, and a list of qualified cool roof products.
Buying Cool Roof Products
To reduce cooling costs, be sure to specify roof products that meet the recommended levels, whether buying from GSA or through a contractor. All products with the ENERGY STAR label meet efficiency requirements.
The Federal supply source for roof products is the General Services Administration (GSA), which offers them through Federal Supply Schedule 56-IV(A), "Construction and Building Materials."
These requirements apply to all forms of procurement, including guide and project specifications; construction, renovation, repair, energy service, operation and maintenance (O&M) contracts; lease agreements; and solicitations for offers. Energy performance requirements should be included in all evaluations of solicitation responses. Buyers shall insert the standard clause from FAR section 52.223-15 into contracts and solicitations that deliver, acquire, furnish, or specify energy-consuming products for use in Federal facilities. Agencies can claim an exception to these requirements through a written finding that no ENERGY STAR-qualified or FEMP-designated product is life-cycle cost effective for a specific application.
The three properties to look for when selecting a roof material to reduce building cooling load are:
- High solar reflectance
- Endurance of high reflectance over time
- High emittance.
The ENERGY STAR program presently considers reflectance only, not emittance. High emittance lowers roof temperature by increasing the release of heat by thermal radiation. To ensure a high-emittance roof, avoid unpainted metal roofs and aluminum coatings. If installing a metal roof, make sure it is painted a light color (not with a clear coating).
Choose an installer carefully to ensure proper installation of a roof product or roof coating that will maximize durability and solar reflectance. The National Roofing Contractors Association (NRCA) provides some helpful advice in its "Guidelines for Selecting a Roofing Contractor" (available on the NRCA website). Roofs should be properly examined at regular intervals and maintained or cleaned when necessary and appropriate to assure the maximum solar reflectance.
Finding More Information
Federal supply sources are the U.S. General Services Administration (GSA) and Defense Logistics Agency (DLA). GSA sells products through its Multiple Awards Schedules and GSA Advantage! DLA offers products through the Defense Supply Center Philadelphia and DOD EMALL.
Lawrence Berkeley National Laboratory provided supporting analysis for this acquisition guidance.