Abstract: A roofing system and method of installing a roofing system can include a roof deck with first and second layers applied over the roof deck, and with a membrane applied thereover. The first and second layers can comprise insulation materials, with at least one of the first and second layers including a reinforced insulation material comprising a substrate with a reinforcing sublayer integrated therewith. The reinforcing sublayer can define an upper surface of the reinforced insulation material. The roofing system is configured to resist impacts from hail and other objects without a coverboard.

Abstract: An insulation system includes a first insulation panel having a thickness of 0.4 inches to 6 inches, a second insulation panel including a first side and an opposite second side, a third insulation panel, a first material contacting the first side of the second insulation panel, the first material connecting the first insulation panel to the second insulation panel, and a second material contacting the second side of the second insulation panel, the second material connecting the second insulation panel to the third insulation panel, the insulation system positionable between a folded configuration in which the first insulation panel, the second insulation panel, and the third insulation panel are stacked, and an unfolded configuration in which the first insulation panel, the second insulation panel, and the third insulation panel are unstacked.