Fabco Board (R) can be very conveniently installed on a roof. In classical as well as Inverted roofs. It can be used with most roof membranes if appropriate precautions are observed. Once the waterproofing membrane has been installed and flood tested, the Fabco Board insulation boards can be installed loose laid or spot bonded to the waterproofing membrance. In protected roof membrane assemblies, ballast is applied after Fabco Board roof insulation has been loose laid over the roof membrane. The amount of ballast will vary with the project’s wind-uplift resistance requirements & thickness of the Fabco Board roof insulation board.