Kingspan Insulation’s Kooltherm cavity closer has been developed to offer high thermal efficiency and fire performance.
Its rigid plastic insulating core helps to provide low thermal conductivity, delivering a lambda value of 0.022 W/mK.
It has achieved more than 47 minutes’ fire integrity and 41 minutes’ insulation with a PVC window in an accredited fire resistance test in line with BS 476 Part 20: 1987. Suitable for timber, metal or plastic window frames, the closer forms a positive integral damp-proof barrier and key for the direct application of plaster. Kooltherm says this prevents problems associated with traditional methods of closing cavities and thermal bridging, as well as avoiding the need for cut bricks, blocks or special reveal blocks.
The cavity closer comes in six sizes from 50-150mm and can be built in or used to preform openings when frames are fitted later.