NRP3 Hybrid is the hybrid-core version of the three-rib roof profile. The core is rock wool based and carries polyurethane strips along its edges: the strip holds the screw seat tight and makes the panel somewhat lighter.
Since the core remains mineral, the fire class is the same as rock wool, A2-s1-d0. Thermal conductivity is in the same band, 0.045 W/mK. The hybrid core is chosen for roofs where A2 class is mandatory but the compression behaviour in the screw zone matters.
Rib height is 37 mm; span and snow load are selected from the load table together with thickness. The tables are in the Library section, and the joint details are in the Library section.
