Designed as an intermediary thermal layer option for Energysaver composite panel rooflights where sig- nificant improved insulation advantages can be gained by reducing the U-value from 1.9W/m2K to as low as 0.9W/m2K. Positioned between the outer glass reinforced plastic weather sheet and the liner sheet, Cleartherm2 can be used in single, double or double with spacers variants, depending on the level of ther- mal performance required.
Development of Cleartherm2 involved advanced manufacturing techniques and the use of premium quali- ty polycarbonate resins, making it possible to reduce wall structure and achieve exceptionally thin wall thicknesses. This also makes the sheet extremely light in weight and with a reduction in material, ulti- mately more cost effective without compromising on the glass-like optical clarity and thermal perfor- mance.
Energysaver composite panel rooflights satisfy the demands to achieve thermally insulated and well day lit wide-span buildings as set out in Part L of the Building Regulations and ultimately help them meet their CO2 emissions targets. By introducing quality natural daylight, the artificial lighting requirement can be reduced or turned off when daylighting levels are adequate. The sheet can also be used to provide im- proved thermal performance for site assembled built-up rooflights and factory assembled barrel vaults. Key facts for including Cleartherm2 are:
- Quality light transmission, diffused daylight;
- Exceptional thermal performance;
- Light weight to strength ratio;
- Avoidance of thermal bridging to prevent condensation;
- Fire performance.