We are a Canadian company with branch office in China. We manufacture PUR structural Insulated Panels according to Canadian standard and export them world-wide. We do not glued; our SIPs are made with high-pressure injected polyurethane foam in a press mold, NOT GLUED. No EPS, No XPS, we use the best insulated material: Polyurethane. We use Canadian OSB for sheathings or magnesium board for exterior sheathing, which could eliminate the need for exterior renovation. We offer 4" & 6-11/16" thickness SIPs for different region.