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PRODUCT IS DISCONTINUED - PLEASE CONTACT US TO DISCUSS ALTERNATIVES Celotex Crown-Fix is a brand new product for use in flat roof systems. Representing the next phase of Celotex innovation Crown-Fix is a rigid polyisocyanurate (PIR) board which delivers excellent dimensional stability and added robustness in a mechanically fixed single ply membrane flat roofing system. Crown-Fix has a low lambda value of 0.022W/mK offering high thermal performance. Crown-Fix is suitable for mechanically fixed single ply membranes and provides excellent compressive strength, delivering increased dimensional stability and added robustness. Crown-Fix is suitable for use on fully sealed metal, timber and concrete decks. It is secured to the deck using thermally broken or mechanical fasteners. To find out more about this item or any other products in our range please speak to a member of our experienced sales team today..