The origins of mechanically-attached waterproofing membranes can be traced back to a number of what seemed as unrelated events more than four decades ago, and a California sales representative who got a great idea.
The first event was wide sweeping legislation across the country in prohibiting the use of asbestos in building products. During the mid-1970s, the use of asbestos as an additive in cement and stucco products were being banned throughout the United States. This had a dramatic effect on the physical properties of these products at the time.