The following self-supporting composite lightweight panels “PAN-FRI”, “PAN-PLA”, “SAN-FRI”, “SAN-PLA” present different thicknesses, and consists of basis, rafters, an insulation injected polyurethane foam core, and a covering layer as described below:

Panels PANFRI and PANPLA: They are made of an inner skin or basis, two lateral faces of pine-wood rafters, an injected polyurethane core and an outer skin of a paper kraft barrier (for the polyurethane protection against degradation by the UVA during the installation process).

Panels SANFRI and SANPLA: Sandwich panels composed by an inner skin or basis, two lateral faces of pine-wood rafters, an injected polyurethane core and an outer skin of water repellent particle board. The union between the core and the external faces is carried out by the polyurethane injection.

The PANFRI, PANPLA, SANFRI and SANPLA panels are used as insulating self-supporting roof panels, adequate to be used indoor in normal humidity conditions. They do not have structural functions nor have significant influence on the ranking resistance of the works.

The PANFRI, PANPLA, SANFRI and SANPLA panels always require external finishing layer/s to provide waterproofing and may require an extra insulation layer to fulfil performances.