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The National Roofing Contractors Association offers green roof systems manual—2007 edition

FOR IMMEDIATE RELEASE	CONTACT: JAMES R. KIRBY
JULY 2007	(847) 299-9070, ext. 7570
	jkirby@nrca.net
THE NATIONAL ROOFING CONTRACTORS ASSOCIATION OFFERS GREEN ROOF SYSTEMS MANUAL—2007 EDITION Rosemont, Ill.—The National Roofing Contractors Association has released The NRCA Green Roof Systems Manual—2007 Edition. The manual provides in-depth technical information regarding the design and installation of quality green roof systems. The focus of the manual is waterproofing aspects of green roof systems. NRCA defines a green roof system as plantings/landscaping installed above a waterproofed substrate at any building level that is separated from the ground beneath it by a manufactured structure. A green roof system consists of a waterproofing system and its associated components—such as protection course, root barrier, drainage layer, thermal insulation and aeration layer—and an overburden of growth medium and plantings. NRCA divides green roof systems into three primary categories: extensive (shallow), semi-intensive (moderate depth) and intensive (deep). The green roof system details in The NRCA Green Roof Systems Manual—2007 Edition provide design and installation information for: Hot-fluid-applied, polymer-modified asphalt membranes APP- and SBS-polymer-modified bitumen sheet membranes EPDM membranes PVC membranes One- and two-component, fluid-applied elastomeric membranes The manual provides limited information about green roof system components that are not waterproofing-related, such as growth medium, filter fabric and reservoir layer. For more information about The NRCA Green Roof Systems Manual—2007 Edition or to place an order, visit shop.nrca.net; fax (847) 299-1183; or call NRCA InfoExpress at (866) ASK-NRCA (275-6722). ###