Kingspan Insulation has expanded its GreenGuard extruded polystyrene (XPS) insulation board product offering with additional thicknesses of 3 and 4 inches in select 25-, 40- and 60-psi compressive strength boards. The company also has added a new four-sided routed drainage channel board. The products help round out Kingspan’s GreenGuard line in commercial markets, such as roofing, cold storage, and various below-grade and vertical wall applications. The GreenGuard XPS Drainage Channel Board is for use in protected membrane roof assemblies requiring 40- or 60-psi minimum compressive strength and drainage channels. Drainage channels are cut along all four sides of the board at 0.5-inch deep and 0.25-inch wide. When placed facing down in a PMR assembly, channels permit drainage of water that seeps through to the roof membrane.