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 (EPS is labeled as cancer causing substance by US health department), 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 SIP for different region. SIP buildings are energy efficient, quake resistant, and quick to build. They are warm in winter, cool in summer, and are the best choice of building materials in earth quake frequents region.