PU roofing sandwich panels are built and tailored to withstand different weather conditions. They are strongly waterproofed and insulated. A polyurethane core minimizes heat escape from the building in winters and prevents heat from entering the building in summers, maximizing energy efficiency. The outer layers are usually made with a particular type of finish which protects against UV rays, rain and snow. These panels are lightweight which reduces the structural burden of the building while enhancing the ease of installation on different roof types. They provide the structure with an sandwich-panel roofing solution PU resistant to the severest weather while ensuring a shed that is dry and comfortable.