Kingspan Insulation has announced that its GreenGuard GG300 boards have achieved a lower declared lambda value of 0.033 W/mK (0.035 W/mK design thermal conductivity for inverted roof applications). This improvement enables project teams to achieve target U-values with slimmer constructions, particularly in specialist applications requiring insulation boards with high compressive strength.
The rigid extruded polystyrene (XPS) insulation boards boast minimal water absorption and are resistant to ground moisture penetration, making them ideal for demanding applications. These include inverted roofs, basements, car park decks, and heavy-duty flooring, where their compressive strength of 300 kPa (tested to BS EN 826: 2013) is particularly valuable.
In addition to the enhanced lambda value, Kingspan GreenGuard GG300 boards are now available in a 180 mm thickness. This increased thickness can reduce the number of layers of insulation required for a project, facilitating faster installations. The use of Kingspan GreenGuard GG300 in inverted roof, floor, and basement applications (selected thicknesses) is covered by BBA Certificate 22/6048.
The popular XPS insulation range also includes Kingspan GreenGuard GG500 and GG700, which achieve compressive strengths of 500 kPa and 700 kPa, respectively, when tested to BS EN 826: 2013. Kingspan GreenGuard boards are manufactured on a specialist line at Kingspan Insulation's Selby (North Yorkshire) facility, which boasts a 100% reclaimable polystyrene waste stream. The boards are produced under a management system certified to ISO 9001: 2015 (Quality management systems), ISO 14001: 2015 (Environmental Management Systems), ISO 45001: 2018 (Occupational Health and Safety Management Systems), ISO 50001: 2018 (Energy management systems), and ISO 37301: 2021 (Compliance management systems).
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