High-strength roofing products using novel glass fiber mats

A high-strength roofing product comprising:

• (A) a glass fiber mat consisting essentially of glass fibers, voids extending through the thickness of said mat and a binder to hold said fibers together, said fibers having a length of about 1/4 to 3 inches and a diameter of about 3 to 20 microns, said mat having a thickness of about 0.3 to 3 mm. and a basis weight of about 20 to 200 g./m.sup.2, characterized in that;
• (a) at least about 70% by weight of said fibers of substantially the same fiber length, are substantially uniformly enmeshed individual filament fibers,
• (b) less than about 20% of the area of said mat are voids which extends through the thickness of the mat, the rest being fibers, and,
• (c) at least about 80%, 30% and 10% of said voids have an equivalent diameter which is less than about 50, 10 and 5 microns, respectively, and,
• (B) a bituminous material impregnated in said mat.