BUFR Design Guide - IKO

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12 REINFORCED BITUMEN MEMBRANE SYSTEMS ENGINEERED FOR A MODERN WORLD What is prevENt graphite technology? <strong>IKO</strong>’s Ultra prevENt systems utilise graphite technology, which provides the highest fire performance without affecting the primary waterproofing function or life expectancy of the membranes. How it is made The upper surface of the membrane base carrier (excluding the overlap area) is coated with expandable graphite crystals (this accounts for only 1% of the total weight of the membrane and does not affect the waterproofing capability of the membrane construction). All types and weights of polyester base fabric, including all prevENt capsheets can be provided with this fire resistant technology. How it works Expandable graphite is naturally occurring; it is very environmentally friendly, it is insoluble in water, and it functions as a flame retardant by endothermic combustion reaction when in contact with heat. In a fire the graphite expands, drawing heat out of the combustion process and creating a heat-insulating layer after expansion. The typical intumescent effect forms a barrier against flames and stops the dripping of the coating from the underside of the roofing, and also acts as an effective smoke suppressant. Base carrier coated with expandable graphite crystals, prior to the application of SBS coating bitumen When exposed to heat the graphite expands through the coating forming a heat shield Ultra prevENt and Goldseal Certificate No. 91/2671 Mach One Certificate No. 00/3760 Certificate No. 626a Technical hotline: 0844 412 7207 www.ikogroup.co.uk
REINFORCED BITUMEN MEMBRANE SYSTEMS ENGINEERED FOR A MODERN WORLD 13 “The specifier, installing contractor and building owner can be assured of the best all round waterproofing and fire performance protection.” Features and benefits Very low smoke production Smoke effects cause more casualties than the effects of the fire itself. The expandable graphite functions as a very efficient built-in smoke suppressant, with better results than any other known bituminous fire-retardant system. No toxic gas release Carbon monoxide is a major toxic element in smoke development. In the event of fire, prevENt membranes produce a very low percentage of carbon monoxide. Halogen-free technology prevENt fire performance technology is also halogen-free, therefore no toxic fumes from halogenated compounds are produced during application or in the event of a fire. This performance provides significant advantages over synthetic membranes, which rely on toxic halogenated compounds to achieve any fire performance characteristics. Reduces the dripping of the burning coating The intumescent effect of the expandable graphite reduces the dripping of molten bituminous coating along the membrane. Reduces heat release The less heat that is released, the less the chance of a fast spreading fire, and the more time available for evacuation. prevENt membranes act as a very efficient fire retardant. The rate of heat release is half that of a standard polyester membrane and it has considerably better results than all known alternative fire retardant systems. Maintains primary waterproofing function The waterproofing integrity and life expectancy of the roofing membranes remain completely unaffected as the polyester bases and coatings remain completely unaltered in fire-resistant form. Highest UK and European testing standards prevENt membranes have been tested to the most stringent European standards, and have achieved the highest performance ratings in all sections of fire tests EN 1187: 1, 2, 3 and 4 (BS 476: Part 3: 2004). Optimum safety in the event of fire, for man and the environment prevENt membranes are not just another solution designed to meet the standards of fire test resistance. The prevENt range is above all a “safe” concept which significantly improves the safety of people during the evacuation of a building in the event of a fire, without releasing harmful smoke or toxic fumes into the environment. High performance and fire safety as standard All <strong>IKO</strong> prevENt membranes (including Mach One) incorporate graphite technology, meet LPCB requirements, yet still offer the highest level of waterproofing and life expectancy performance. Technical hotline: 0844 412 7207 www.ikogroup.co.uk
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BUFR Design Guide - IKO

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