Pre-fabricated waterproofing membrane made of distilled bitumen and elastomeric polymers (SBS), with a woven non woven single strand composite polyester reinforcement, with high mechanical characteristics and excellent dimensional stability. The excellent and long lasting performance of TECH 3000 ANTI-ROOT are given by the sum of the characteristics, the reinforcement and the waterproofing mass, opportunely added with a special chemical product (Preventol B2 Bayer) which confer a very high resistance to both root penetration as well as aggressive chemicals such as fertilizers, herbicidals, etc.