Glass mat and method of making the glass mat

A glass mat comprising:

• an assembly of glass fibers consisting essentially of glass fibers, wherein the assembly of glass fibers are dimensionally constrained to reduce voids between the assembly of glass fibers and are substantially randomly oriented with a tensile anisotropy of less than about 6 in any two directions, wherein the tensile anisotropy is the ratio of a tensile strength of the glass mat taken in the two directions;
• and
• a binder composition comprising an organic resin, wherein the organic resin comprises a urea-formaldehyde composition, a latex composition, a stryrene-butadiene rubber (SBR) composition, a vinyl acetate ethylene composition, a blend or combination thereof and wherein the binder composition comprises the latex present at an amount of up to about 5% by weight based on the total weight % of the binder composition;
• wherein the glass mat having the dimensionally constrained assembly of glass fibers has a surface roughness of a root-mean-square deviation of the surface when measured with an Optical Surface Profilometer of more than about 10% lower than an equivalent glass mat having an assembly of naturally packed glass fibers with an equivalent fiber diameter size, and wherein the glass mat having the dimensionally constrained assembly of glass fibers has a caliper more than about 10% lower than an equivalent glass mat having an assembly of naturally packed glass fibers with an equivalent fiber diameter size.