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56 STRUCTURAL ELEMENTS Waterproofing for the ages


For decades, mastic asphalt has proved its credentials as an underground waterproofing membrane that can last a lifetime, as the Mastic Asphalt Council explains


A long-lasting material, mastic asphalt has stood the test of time proving its quality as waterproofing membrane for preventing moisture penetration


he fluctuations of the water table – and the devastating effects high water tables can have in flood risk areas – is something known to many, but it’s important to take preventative measures to avoid water ingress. If a building is in an area susceptible to groundwater flooding, it’s vital that it is protected from the ground up – and the best defence possible can be provided by one of the world’s most traditional materials – mastic asphalt. Floodwater can take time to build-up but when it rises, the water table in the ground surrounding a building can create hydrostatic water pressure. This water pressure is exerted on the floor and walls of the basement and can lead to water penetration through cracks, joints and structural weaknesses in the basement. Without a tried and tested tanking system this water ingress can then lead to


T WWW.ARCHITECTSDATAFILE.CO.UK


mould, decay, structural problems and other damp-related issues.


Tried and tested


Even the smallest leaks can lead to big problems, which is why it’s critical that specifiers choose a high performance solution that saves time, money and hassle. A long-lasting material, mastic asphalt has stood the test of time proving its quality as waterproofing membrane for preventing moisture penetration in many applications whether for roofing, paving or tanking. To this day, large areas of London including the Houses of Parliament rely on mastic asphalt for protection against rising groundwater levels. This proven tanking system provides a continuous waterproof- ing lining to safeguard walls, floors and foundations. Unlike alternative products


ADF SEPTEMBER 2017


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