Turbo Building Group offers quality Liquid Waterproofing Membranes in Melbourne. Extensive range of Bathroom Waterproofing Membranes for Sale Online! Turbo Building Group has developed expertise in project management and execution of large commercial jobs. Due to the large range of services offered by Turbo Building Group combined with a team of skilled and competent tradespeople, we are able to minimise time on site which translates into considerable cost savings for our clients.