Draft Business Waste Strategy PDF - london.gov.uk - Greater ...

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84 Mayor of London Making waste work in London The Mayor’s Draft Business Waste Management Strategy ■ by 2012, a 50 per cent reduction of construction, demolition and excavation waste to landfill compared to 2005 ■ by 2015, zero net waste at construction site level ■ by 2020, zero waste to landfill. 4.33 The Mayor welcomes these targets because they will create long-term certainty so that the industry can innovate and take the lead to develop products and services for sustainable construction. However, the government’s strategy does not go far enough, particularly in relation to making better use of the tools and systems available to prevent and manage waste and in ensuring that the best use is made of construction waste materials. The Mayor expects government to set high construction waste reuse and recycling targets and establish systems to monitor their delivery alongside landfill reduction targets. 4.34 The Mayor expects London’s construction, demolition and excavation sector to reduce, reuse, compost or recycle their waste to meet the London Plan targets. In light of future increases in the landfill tax, reducing the amount of waste produced and improving its management will produce ever-increasing financial savings as well as environmental benefits. Case study 28 - Construction resource efficiency for London Construction resource efficiency (CoRE) is part of Defra's BREW programme and was set up as a regionally based pilot to draw together the work relating to construction resource efficiency across London and the South East and East of England. The London Development Agency is providing funding and Constructing Excellence has been chosen as the regional champion to drive forward the delivery of CoRE in London. The Building Research Establishment (BRE) is providing a centralised support to CoRE, principally through providing a means of construction waste benchmarking (using SMARTStart), identifying best practicable environmental options for waste generated (using BREMAP), and training of the regional champions/associated delivery bodies. The project will: ■ increase awareness of existing help, information and best practice guidance available to reduce resource use ■ provide access to tools and services that will measure waste and provide targets for improvement ■ develop practical workshops where solutions and best practice can be shared and learned from ■ provide in-depth support for those organisations willing and able to provide exemplar projects in terms of construction resource efficiency and progress waste prevention activities
Making waste work in London The Mayor’s Draft Business Waste Management Strategy Mayor of London 85 ■ provide pre-demolition audits for selected sites. Source: Construction Resource Efficiency (SmartWaste) Take action 4.35 The construction sector often over-specifies materials by as much as 14 per cent, amounting to approximately 13 million tonnes of wasted materials each year 191 . In addition to generating waste, this is a wholly avoidable cost to the developer. The lost value of wasted materials and the cost of waste disposal are a double economic loss for the sector. The increasing costs of landfill, of raw materials (partly as a result of the Aggregates Levy) and of transportation provide real economic incentives for waste prevention through more accurate specification and reuse or sale of leftover materials, for example through material exchange programmes. 4.36 Waste can be prevented in construction projects by: ■ ordering the correct amount of materials at the right time, rather than over-specifying ■ ensuring material storage areas are safe, secure and weatherproof to prevent damage and theft ■ setting up agreements with suppliers to take back surplus materials. 4.37 Refurbishing buildings (i.e. keeping the existing shell of the building), rather than redeveloping them (i.e. knocking the building down and putting up a new building) may also prevent waste. The Mayor’s essential standard, set out in his Sustainable Design and Construction Supplementary Planning Guidance 192 , published in May 2006 to support the London Plan, is that existing building will be reused where practicable 193 . However, when other environmental objectives are taken into account it is possible redevelopment will be more sustainable overall. Full consideration of the benefits of redevelopment over refurbishment should be given at the planning stage and carrying out a pre-demolition audit can be useful prior to refurbishment or redevelopment to identify recovery options for existing materials and products. 4.38 Eighty-five per cent (by weight) of the 7.2 million tonnes of construction, demolition and excavation waste produced in London in 2003 was reused or recycled, while the rest was landfilled 194 . This high reuse and recycling rate suggests effective practices in the sector. However, the majority of reuse and recycling involves crushing concrete and reusing demolition spoil as bulk fill. This does not make the best use of construction materials. If buildings were ‘deconstructed’ rather than demolished
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