The specification for the waterproofing was based upon the traditional bitumen sheet type system. In fact, the project had begun with 4 or 5 smaller structures completed using a 'Superma Antirock' SMS bitumen system. However for programming and other cost efficiency reasons the client opted to utilize Pitchmastic PmB International and the spray applied PmB system having worked together previously in Ireland on several major bridge projects.
PmB is a two part, spray applied, durable corrosion protection and waterproofing material. The high performance system is 100% polyurethane containing no fillers or additives and is VOC free. Once applied, PmB has exceptional bond strength to all commonly used substrates, has excellent crack bridging capability and a life expectancy in excess of 30 years and holds British Board of Agrément approval.
The system has gained BBA approval for use as a damp proof and waterproofing membrane for internal and external tanking. The system holds approvals in many continents including Europe, North America, the Middle and Far East.
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