Abstract: A roof structure wherein a water impermeable membrane is fabricated upon a roof deck and a thermal insulation layer affixed upon the membrane. The insulation layer is thereafter coated with a suitable adhesive material and particles of inorganic particulate attached thereto, whereby a toothing surface is formed upon which is applied a mortar based insulative-protective layer. Alternatively, and in lieu of said mortar based layer, a first water impermeable layer formed of bituminous material may be disposed upon said toothing surface, followed by disposition upon said first layer of a second water impermeable layer formed of elastomeric material having radiant energy reflective material admixed therewith. Optionally, said first layer may be omitted from the roof structure and said second layer placed directly on the toothing surface.

Abstract: A roof structure wherein a water impermeable membrane is fabricated upon a roof deck and a thermal insulation layer affixed upon the membrane. The insulation layer is thereafter coated with a suitable adhesive material and particles of inorganic particulate attached thereto, whereby a toothing surface is formed upon which is applied a mortar based insulative-protective layer.