Friday, Oct. More than participants have completed SpecRight Program training sessions. The SpecRight Program , an NRCA -sponsored program supported by The Roofing Industry Alliance for Progress and other industry partners, focuses on educating roofing contractors about sustainable, environmentally responsible, energy-efficient roof systems.
The program stresses the importance of proper design and installation, quality materials and ongoing maintenance and gives contractors the tools to emphasize quality over cost. The class is now available as a customized educational training program. For more information, log on to www. NRCA has launched NRCA SmartBrief, a free opt-in e-mail newsletter that sends top roofing industry news stories to roofing professionals four days each week, keeping them informed about current industry events.
An e-mail will be sent to roofing professionals in mid-October asking whether they want to subscribe to the newsletter; a link is also available on NRCA's Web site, www. Contact: Janice Davis , ext. Contact: Bennett Judson , ext. Contact: Shelly Najera , ext. Contact: Michele Biesiada , ext. Contact: Anne Schroeder , ext. Please log in to leave a comment. 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.
As with all roof system types, proper design, quality materials and quality workmanship are needed to achieve a green roof system that will perform satisfactorily for its anticipated service life. Appropriate maintenance during a green roof system's service life also is necessary to ensure its success. Also provided in the General Green Roof Project Considerations section is information about pre-bid and pre-job conferences; material storage and handling; temporary green roof waterproofing systems; weather considerations such as high- and low-temperature installation, wind and precipitation ; deck and structural design considerations; surface inspection; slope and drainage; expansion joints and control joints; curbs and penetrations; flashings such as membrane base flashings, sheet-metal counterflashings and terminations ; quality assurance and water testing; overburden; warranties; and recommendations for building owners.
The Green Roof System Guidelines section provides in-depth technical information about green roof systems' design and installation; however, NRCA recognizes green roof system practices vary considerably throughout the U. Selected plant varieties commonly dictate a green roof system's necessary depth of growth medium.
This also helps guide the specific component design. Of course, when reroofing with a green roof system, a roof deck's structural capacity should be considered. Because of the varying depths of growth medium, NRCA 's manual divides green roof systems into the following three primary categories:.
Extensive shallow : a green roof system with an engineered soil-based growth medium approximately 2 to 6 inches deep Semi-intensive moderate depth : a green roof system with an engineered soil-based growth medium approximately 6 to 10 inches deep Intensive deep : a green roof system with an engineered soil-based growth medium greater than 10 inches deep. A fundamental idea behind the manual's development is that a green roof system is a combination of waterproofing and roofing concepts.
Because a green roof system is likely to have moisture present within the system most or all the time, NRCA considers a waterproofing membrane appropriate. And because green roof systems include detailing similar to all other roof system types parapet walls and roof drains, for example , construction details for green roof system waterproofing membranes are based on termination concepts NRCA considers appropriate for all roof system types.
Performance attributes, environmental features and common system components for green roof systems are included in the manual, as well. Possible performance attributes include increased thermal efficiency, noise reduction and extended membrane service life.
Likely performance attributes are stormwater management, increased efficiency of roof-mounted photovoltaic panels and aesthetic benefits. Specific installation parameters, including minimum membrane thickness and ambient temperature recommendations, are provided for each recommended green roof system waterproofing membrane type.
ASTM International standards for materials and application are provided where appropriate. NRCA recommends membranes be adhered to decks to provide the most stable substrate for green roof system waterproofing membranes. Therefore, thermal insulation used in a green roof system is installed above the membrane or below the roof deck.
Positive drainage should be provided by sloping the structural deck. Users can access the calculator for free at www. The EnergyWise Roof Calculator is a software application that allows roofing professionals to construct virtual roof assemblies to evaluate thermal efficiency and estimate energy costs.
After being prompted to enter specific roof assembly information, users can generate a report summarizing the proposed roof assembly design,estimated heating and cooling costs, and minimum thermal requirements. Graham, NRCA's associate executive director, at , ext. Contact: Michelle Iniguez , ext. Penn State University currently is conducting research to measure R-values of green roof systems; is involved with the U. Department of Energy's Solar Decathlon, a project that incorporates solar roof system technology; has developed "4-D" project management software; and has conducted a photovoltaics study for the electrical contracting industry and nanotechnology involving photovoltaic integration.
At an Alliance meeting in Phoenix April , David Riley, associate professor for the department of architectural engineering and executive director of the Center for Sustainability at Penn State University, explained three initial objectives for the partnership:. Pursue the Solar Decathlon to explore how building-integrated photovoltaic systems affect the roofing industry and promote the roofing industry's role regarding solar energy systems to increase visibility of the roofing industry among college graduates.
During the Solar Decathlon, teams from colleges and universities all over the world strive to design, build and operate the most attractive and energy-efficient solar-powered home. Contribute to the advancement of green roof system research specifically regarding energy performance by sponsoring state-of-the-art research and developing educational materials that promote green roof system awareness.
Alliance funding would pay for the testing of green roof system specimens at Penn State University. Investigate the potential effects and respective market strategies for the roofing industry as interest in building-integrated photovoltaic technologies grows.
This will lead to increased deployment of solar electric systems on roof surfaces, which will present challenges and opportunities for the roofing industry. Elizabeth Ahn, Silver Spring, Md.
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