Straw for sure


The construction industry is recognising the importance of ‘reuse, renew, and reduce’ practices to decrease the contribution to global greenhouse gas emissions.

According to an industry report from the Ministry of Business, Innovation & Employment, “a shift in how we procure and use building materials is essential.” To put it simply, innovation is key. The United Nations Environment Programme say adopting bio-based materials is the answer. These naturally-derived, renewable, and highly biodegradable materials have a “low environmental impact, the potential to store carbon, and contribute to biodiversity preservation.” The report adds that industry leaders are increasingly nervous about the reputational risks associated with wasteful practices, choosing to embrace alternatives.

Straw, a prominent bio-based material throughout human history, has seen a “revival” in recent years. Available and easy to source, straw is earning a spot as an innovative and environmentally friendly option in New Zealand’s construction industry. As use grows, so does research, catalysing the creation and production of new straw-based materials. This innovation has been realised through straw biomass ash, straw building panels, and straw fibre concrete.

Across the country, construction and architecture companies are adopting and implementing straw-based materials into their projects and processes. New Zealand company Hiberna Modula offers structural insulated panels which “capitalise on straw’s inherent advantages, including strength, fire resistance, moisture control, insulation”: an efficient alternative to traditional timber framing. “When used appropriately in construction, straw bales provide high levels of insulation and can help keep a home quiet and warm in winter and cool in summer,” the report outlines, highlighting the inception of this material within the building industry as an effective, eco-friendly choice.

 


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