The construction and demolition industry is one of the largest waste-producing industries in New Zealand. Construction and demolition waste may represent up to 50% of all waste generated in New Zealand, with 20% of the waste going to landfill and 80% going to cleanfill sites.
Disposing of these materials to landfill means that, as well as not being recovered for further use, they are contributing to adverse environmental effects. These include harmful chemicals leaching into soil and waterways, plus methane emissions into the air, as the waste breaks down and rots.
Types and sources
Construction and demolition waste is made up of a wide variety of materials, including concrete, plasterboard, wood, steel, brick and glass.
The sources of this waste include off-cuts, packaging, surplus materials, formwork, protection materials, damaged materials and rework.
Reduce, reuse, recover
The good news is that much of this construction and demolition waste can be reduced, reused or recovered.
However, diverting waste from the landfill or cleanfill requires careful planning for each building project. Research shows that planning for waste reduction and reuse during project planning phases is the most successful way to ensure waste is minimised throughout the project.
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REBRI: Resource efficiency in the building and related industries
Resource efficiency is all about using materials, energy, time and money more effectively.
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Assessing waste streams
The possibilities of material recycling need to be established at the start of any building project.
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Planning for waste management
Diverting waste from the landfill or cleanfill requires careful planning for each building project.
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Managing waste
Opportunities to reduce waste exist at all stages of construction and deconstruction projects.
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Case studies
Read case studies about waste management in construction projects in New Zealand.
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Plans, forms and guides
Access the REBRI recycling directory, REBRI resource routing calculator, REBRI waste management plan, REBRI waste transfer form, guides, checklists and more.
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