PU Sandwich Panel OSB, fiber cement facing SIPs The panels are made by sandwiching a core of rigid foam insulation PU Sandwich PanelOSB, fiber cement ... two skins of structural/engineered panels like oriented strand board OSB, fiber cement board and so on. SIPs are engineered to ... : 1220x2440mm,1220x2743mm,1220x3050mm,1220x6100mm,Thickness: 114mm,165mm, 210mm, 257mm. PU Sandwich Panel