One of the strongest bases on the market the pro shed base is made using the highest quality recycled plastic with a load capacity of 180 tonnes metre squared 180000kg the base is well ventilated and even the fixing pins and packaging are made from recycled materials all of the kits are delivered with a free heavy duty weed membrane product comes delivered in 15kg parcels bases are available in a large number of sizes ranging from 3ft x 6ft to 20ft x 10ft see size option