VAST Enterprises manufactures composite material able to replace concrete in walkways. VAST Composite Pavers can contribute to LEEDâ„¢ Green Building credits in areas of Construction Waste Management, use of regional materials, Stormwater Design, Heat Island Effect, Innovative Design and Recycled Content. Their products are made from up to 95% recycled materials. As a member of the U.S. Green Building Council VAST is able to contribute to LEED credits for new construction (LEED-NC) and existing buildings pojects (LEED-EB).