Advanced composite roofing shingle
OwnerMatthew E. Johnsoninventor
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Abstract
An advanced, lightweight composite roofing shingle specifically designed to prevent hail damage and high wind uplift. The inventive laminate includes a conventional random fiberglass mat (20) used for shingle stability, sandwiched by an upper ply of Kevlar fabric (28) selected for high impact resistance, and a bottom ply of E-glass fabric (24) or similar type oriented for exceptional bending resistance. The fibrous materials are saturated or coated, and bonded with a suitable matrix such as roofing asphalt. Design flexibility, inherent in the novel roofing shingle concept, allows the material properties to be optimized for cost and performance based on weather requirements in various geographical regions of the country.
Claims24
A roofing shingle having an exposed surface comprising:
- (a) a fibrous mat material having a chord and a length and top and bottom side;
- (b) an upper layer of directional fiber positioned adjacent to the top side of said mat;
- (c) a lower layer of directional fiber positioned adjacent to the bottom side of said mat;
- and
- (d) a semi-flexible matrix compound impregnating the said fibrous mat, said upper layer, said lower layer wherein the directional fiber's upper and lower layers are oriented and positioned with respect to each other such that the overall weighted elastic modulus of said materials in the chordwise direction is located below the geometric centroid of said shingle, thereby imparting slight convex curvature of said exposed surface when said shingle is placed under tension in a chordwise direction.
A roofing shingle having an exposed surface comprising:
- (a) a fibrous mat material having a chord and a length and top and bottom side;
- (b) an upper layer of directional fiber material having sufficient strength to resist tearing when impacted by hail having a mean diameter of 0.6 inches or greater, positioned adjacent to the top side of said mat;
- (c) a lower layer of directional fiber material having sufficient strength to resist wind uplift, positioned adjacent to the bottom side of said mat;
- and
- (d) a semi-flexible matrix compound impregnating said fibrous mat, said upper layer, and said lower layer wherein the directional fiber in said upper and lower layers are oriented and positioned with respect to each other such that the overall weighted elastic modulus of said materials in the chordwise direction is located below the geometric centroid of said shingle, thereby imparting slight convex curvature of exposed surface when said shingle is placed under tension in a chordwise direction.
Dependencies are inferred from the claim text.