Residential Metal Roof Thermal Reflective Insulation Suitable Thermal Reflective Insulation and Sarking Membranes for use under a Residential Metal Roof. Trade Select® CeaseFire® ThermalLiner™ VapourTech® RWC Roof Wall Commercial Sarking xR Ametalin ThermalCav™ Drainage Battens Sarking ThermalBreak®