Patent ID: 8865303

Claim:
A cool roofing system comprising: at least one asphalt layer and at least one granular layer directly adhered to a top surface of the asphalt layer, wherein the granular layer comprises a plurality of highly reflective calcined, bright white crushed kaolin particles having a solar reflectance ranging from about 80% to about 92% prior to any added surface treatment and a particle size ranging from about 0.3 mm to about 2.4 mm wherein the highly reflective bright white crushed kaolin particles comprise crushed kaolin chamotte particles, wherein the highly reflective, calcined, bright white crushed kaolin particles have a surface treatment consisting of a clear coating, wherein, when the highly reflective calcined, surface treated, bright white crushed kaolin particles are applied to the asphalt layer used for roofing materials, the highly reflective calcined, surface treated, bright white crushed kaolin particles have a resultant reflectance between about 70-82% substantially fully covering the surface of the asphalt layer in the cool roofing system providing a minimum solar reflectance of 70% or more; and wherein the clear coating is selected from the group consisting of silanes, siloxanes, polysiloxanes, organo-siloxanes, silicates, organic silicates, silicone resins, acrylics, urethanes, polyurethanes, glycol ethers and mixtures thereof.