By Steve Graham, Networx
Green building and construction does not need to stop with bamboo flooring. Bio-composites, or biodegradable composites, are the next generation of sustainable building materials. They combine plant fibers with natural resins and binders to make roof sheathing, fences, fireproof doors, and more. Traditional construction materials are energy- and resource-intensive. Buildings account for 40 percent of landfill waste, according to the U.S. Environmental Protection Agency. Bio-composites and other sustainable building materials help eliminate non-renewable waste, reduce raw material usage, and cut fossil-fuel consumption.
Many bio-composites use recycled materials or fast-growing plant fibers. In turn, they are recyclable or are designed to rapidly decompose. Bio-composites typically use natural binding agents, reducing the need for petrochemicals or other fossil-fuel products. Even more fuel is saved in the transportation of lightweight, locally sourced bio-composites. Like other sustainable building materials, bio-composites also help builders and homeowners earn Leadership in Energy and Environmental Design certification. The stamp of approval for green building and construction, LEED-rated buildings may also qualify for rebates and tax credits.
Several bio-composites are used in roofing. Sustainable bamboo can be pressed and mixed with resins to form light, strong and impact-resistant roofing panels. Roof sheathing can also be sustainable. Environ Biocomposites and other companies use wheat and other fast-growing fibers to make sustainable particleboard or plywood replacements. Environ said its Microstrand sustainable building materials are lighter and stronger than traditional wood products, and emit no volatile organic compounds. Contact a local roofing contractor for more information on bio-composite roofing.
Bio-Composite Landscaping Materials
Sustainable building materials are not confined to the house. Heartland Biocomposites is a Wyoming company that specializes in fences and decking made of wheat straw and recycled plastic. The wheat straw is an abundant agricultural byproduct. The plastic is non-biodegradable high-density polyethylene, used in milk jugs and detergent bottles. The faux wood is designed for high strength and minimal maintenance, avoiding the warping, splintering and fading of real wood. To discuss green outdoor projects, contact a local landscaping contractor.
Bio-composite technology can turn wheat or sunflower hulls into fire-rated doors. Safety codes typically require fire-rated doors for renovation projects involving attached garages. Fire-rated doors can also be used in other locations for added safety. Light, low-density bio-composite interior doors also are available. For more information on bio-composite fire doors and other door options, contact a local contractor.
Bio-Composite Walls and Framing
Most additions or remodeling projects can be completed with nothing but sustainable building materials. Natural lime combined with hemp forms a bio-composite concrete. Unlike more traditional materials, hemp-lime concrete can be recycled into fertilizer. Manufacturers said the sustainable bio-composite is also fire-resistant and thermally efficient but permeable enough to discourage mold growth and ensure better indoor air quality. Hemp also is a core ingredient in another wood substitute. Stanford researchers successfully combined hemp fibers with rapidly biodegrading plastic to create a moldable bio-composite fake wood that saves trees and shrinks landfills. The product may soon be commercially available for flooring, furniture, and other green building and construction applications.