KalsiFlex and KalsiWAB are a fibre cement panels suitable for roof underlay applications. Roof underlay as a separation between roof and ceiling, serves as an additional protective layer against penetration of heat, water, or other external exposure from damaging the sections within a building.
In another scenario, roof underlay also protects the roof from any corrosive substances which result from any chemical-inducing or hazardous operation in the building such as furnace area etc.
Also, they function well to meet insulation performance as per acoustic or thermal requirement of the installed roof/ ceiling (horizontal) system.
With proper design consideration, installing a roof underlay would improve the overall durability and maintenance cost of the building.