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Greenix Panels

Greenix modular panels are available with steel or OSB skins… Read more
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  • Before specifying efficient heating and cooling equipment, it’s important to do what we can to reduce heating and cooling loads. Insulation is one of the key products to consider here, but because there are so many insulation products on the market, we look for additional benefits. Examples include cellulose insulation with recycled content, mineral wool insulation with no flame retardants, and fiberglass insulation with no formaldehyde binders. Other products in this area are high-performance windows and glazings, products that contribute to building airtight envelopes, products that reduce thermal bridging, and window-retrofit products.

    With products in this area under constant development, we are always refining our approach. For example, as we have learned about insulation products with hazardous flame retardants and blowing agents that have high global warming potential, we have removed those products from GreenSpec, pending manufacturing changes. We encourage building professionals to pressure manufacturers for those changes through specification language and purchasing decisions.

  • Included here are various erosion-control products, foundation products that eliminate the need for excavation, and exterior stains that result in lower VOC emissions into the atmosphere. Fluorescent lamp and ballast recyclers and low-mercury fluorescent lamps reduce environmental impacts during maintenance and disposal of luminaires.

Brent Ehrlich
Products Editor

Greenix modular panels are available with steel or OSB skins. These structural insulated panels (SIPs) are available in various thicknesses from 4' 3/8” to 6' 3/8” and are injected with polyurethane foam, providing R-values between R-25 and R-40. The interlocking, tongue-and-groove panels may be used as exterior walls or in load-bearing floors or roofs.

Most structural insulated panels (SIPs; also known as stressed skin panels) consist of an insulating foam core sandwiched between sheets of oriented strand board (OSB). SIPs have gained market share in the residential and light commercial building markets because they are quick to assemble and provide excellent energy performance. The insulating core of SIPs is most commonly made from expanded polystyrene (EPS), but extruded polystyrene (XPS), rigid polyurethane foam, mineral wool, or even compressed straw can be used.

SIPs are manufactured in a range of thicknesses providing varying R-values. With some EPS-core products, borate compounds are added to deter insects from burrowing into the foam. Even with borate treatment, it may be necessary to use insect mesh, trap systems, and insecticides on an ongoing basis. SIP buildings can be quickly assembled, particularly when panels are factory-cut for door and window openings. Care must be taken to properly seal panel joints during installation to prevent air and moisture flow through walls, and ensure durability—SIPs are not tolerant of moisture.

Although GreenSpec does not generally recommend EPS as an insulation material (because it is made with several problematic materials, including benzene and the brominated flame retardant HDBE), we list EPS-core SIPs because they provide a relatively easy way to create walls with superb energy performance.

GreenSpec does not currently list extruded polystyrene (XPS) products for two primary reasons: the presence of HBCD, a brominated flame retardant that is used in all polystyrene insulation; and the use of a blowing agent, HFC-134a in XPS, which has high global warming potential (GWP).

LEED Credits

EAc1: Optimize Energy Performance

EAp2: Minimum Energy Performance

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