Barratt and Hanson are the latest firms to take the pledge bringing the value of construction work covered by the campaign to £30bn plus.

WRAP (Waste & Resources Action Programme) launched the scheme in October 2008 as part of the Strategy for Sustainale Construction initiative.

Mike Watson, Head of Construction at WRAP, said: “It’s wonderful that in just over 2 years the Commitment has attracted more than 500 signatories and that this number continues to grow daily. This really illustrates the desire of the industry to work in harmony to tackle waste.”

John Adams, Group Procurement Director Barratt Development PLC said: “Barratt have been working with WRAP over the last 18 months to help us build on the successful work we have previously undertaken with our suppliers such as Knauf with plasterboard and Reconomy on the segregation of construction wastes.

“We are seeking to develop further methods to drive additional savings in our business via the supply chain and seeking to roll out our proven initiatives on cardboard baling and pallet take-back. We look forward to working with WRAP in 2011.”

Hanson UK’s Head of Sustainability Martin Crow said: “Hanson is firmly behind the WRAP commitment to halve construction waste to landfill.

“Waste reduction is one of the fourteen key performance indicators we measure in our sustainability report; it is seen as a key indicator of improving efficiency and sustainable business practices.

“We operate a monthly reporting system that identifies operational and non-operational waste generated across the business and whether it is recycled or disposed of.

“Considerable efforts are made to ensure surplus materials are reused and do not become part of the waste stream. We are delighted to be part of this initiative.”