Specifications:* Length: Customized* Effective width Roof panel: 1000mm* Materials: Color steel sheet and Polyurethane board(PU)* Structure: Upper and lower layer: Color steel sheet ; Middle: Polyurethane board* Thickness: Color steel sheet: 0.3-0.8mm; Polyurethane board: 50mm 75mm 100mm* Polystyrene density: 40kg/m3* Conventional color: Red,Website:http://www.lq-steel-structure.com, white, blue, silver.* Lifetime: 20~30 years* Characteristic: Low cost ,Low weight, heat insulation, retardant, soundproof, water resistant, environmental ,easy to install* Application: Various roofs referring to the large size factory buildings, storages, exhibition halls, gymnasiums etc.Advantage:* Polyurethane roof using dark nail connection, close the lap board.* Unique waterproof tank designed to effectively prevent rainwater infiltration and to avoid the phenomenon of cold bridges.* 40mm wave height, greatly improve the bearing capacity of the roof. Building insulation effect in ensuring that, while customers reduce construction costs, the minimum roof slope of up to 3%.Features:* Thermal conductivity, low thermal conductivity of polyurethane sandwich composite panels, good insulation properties, is the best insulation material.* Plate appearance, easy installation* Polyurethane sandwich panel fire resistance* Non-toxic and odorless polyurethane sandwich panels* Use a wide temperature range* Waterproof, moisture