Gaf Corporation

Gaf Building Materials Corporation

Stanley P Frankoski

Alfredo A Bondoc

Louis L Grube

Duane A Davis

Bruno E Magnus

Frederick W Sieling

This invention relates to a stabilized, flame retardant roofing mat or sheeting impregnated with a composition comprising, a copolymeric styrene modified asphalt and a critical amount of between 35 and about 50 wt. % of colemanite. The invention also relates to the novel flame retardant composition which can be employed for treating roofing reinforcement and building siding material.

Flame retardant bitumen

The invention relates to a reroofing shingle having a 7.5 inch or a 15 inch vertical exposure, a 2 inch lap portion and an overall height of n(exposure)+2 inches where n has a value of 1 when the reroofing shingle is an undivided strip and a value of 2 when the reroofing shingle comprises a sheet having spaced tabs in the butt portion thereof. The invention also relates to the installation of the present tabbed reroofing shingles over standard asphaltic roofing in a manner such that the lower tab edges of each successive course of reroofing shingle is alined with the top of the spaces between tabs of the preceding reroofing course and allows for a 7.5 inch or 15 inch exposure between courses.

Roofing shingle

A rectangular shingle sheet having a butt portion which is longitudinally divided into spaced apart tab segments and an undivided headlap portion which is 1.3 to 1.5 times higher than the outward extensions of said tab segments in the butt portion; the butt portion and headlap portion carrying an asphaltic backing of varying thickness wherein the upper area of the headlap portion which is of a height approximately equal to that of the butt portion is coated with an asphaltic backing of between about 5 and about 15 mils thickness and the remaining lower area of the headlap portion and the entire butt portion is uniformly coated with an asphaltic backing of between about 20 and about 100 mils thickness. In one embodiment, the shingle is a composite roofing shingle comprising a shingle sheet having a butt portion which is longitudinally divided into spaced apart tab segments, and a separate elongated strip underlying the tab segments which fills the space between the tabs. A process for the manufacture of the shingles of this invention. comprises undercoating the butt portion and from about 1/7th to about 3/7ths of the adjoining headlap portion with an asphaltic material in a thickness of from about 20 to about 100 mils, undercoating the remaining headlap portion with asphaltic material in a thickness of from about 5 to about 15 mils and contacting said thicker undercoating with a bar which hydroplanes on the surface of the thicker undercoating to smooth the surface thereof.

Process for the manufacture of asphalt shingles

A rectangular shingle sheet having a butt portion which is longitudinally divided into spaced apart tab segments and an undivided headlap portion which is 1.3 to 1.5 times higher than the outward extensions of said tab segments in said butt portion; said butt portion and headlap portion carrying an asphaltic backing of varying thickness Wherein the upper area of the headlap portion which is of a height approximately equal to that of the butt portion is coated with an asphaltic backing of between about 5 and about 15 mils thickness and the remaining lower area of the headlap portion and the entire butt portion is unifomly coated with an asphaltic backing of between about 20 and about 75 mils thickness. In one embodiment, the shingle is a composite roofing shingle comprising a shingle sheet having a butt portion which is longitudinally divided into tab segments spaced apart by between about 0.5 and about 1.5 their width and an undivided headlap portion which is between about 1.3 and about 1.5 times the height of the outward extension of the tab segments in the butt portion; said butt portion and headlap portion carrying an asphaltic backing of varying thickness as described above, and a separate elongated strip underlying the tab segments which fills the space between the tabs and is secured to the shingle sheet in a position underlying the thickened asphalt coated area of said sheet. The invention also includes the process for the manufacture of the shingles of this invention.

Growing community of inventors

West Milford, NJ, United States of America

Stanley P Frankoski