Mapei PURTOP 1000 N liquid roof waterproofing system has been awarded BBA Certification. A two-component solvent-free, fast curing pure polyurea membrane, Purtop 1000N forms a waterproof coating for roofs and podium decks, as well as waterproofing and protecting storage tanks.
During the BBA assessment process, Purtop 1000 N was assessed as a waterproofing layer on pitched and flat roofs, with pedestrian and limited access, including green roofs and roof gardens, fulfilling all requirements. Key factors tested included safety in the event of fire, hygiene, health and the environment – including watertightness, resistance to mechanical damage, root penetration and slip resistance – and durability.
It was also assessed for design, installation, workmanship maintenance and repair, as well manufacture, delivery and site handling. The BBA Certificate 23/7057 confirms that Purtop 1000 N achieves a classification of BROOF(t4) under BS EN 13501-5 : 2005 and has a service life of at least 25 years. Purtop 1000N also has WRAS approval, making it suitable for use in contact with potable water.
A two-component, solvent-free and ‘no VOC’ membrane, Purtop 1000 N creates a strong, flexible membrane on new and existing surfaces including concrete and metal. It is applied by spray with a high-pressure, bi-mixer type pump and is immediately waterproofing and set to light foot traffic. The coating has exceptional tensile and tear strength, high crack-bridging capacity – both static and dynamic – and enlongation capacity.
It also provides excellent resistance to alkalis and diluted acids. No reinforcement is required, it does not form overloads on load-bearing structures and, after reticulation, the coating is completely inert. In addition to BBA Certification, Purtop1000 N is compliant with ETAG 005 (“Liquid applied roof waterproofing kit”) and suitable for contact with drinking water in accordance with Italian Ministerial Decree DM 174/04.
