Pourable or blowable loose-fill insulation product

A method of making a pourable or blowable loose-fill insulation product comprising the steps of:

• providing irregularly-shaped glass fibers which are formed from two distinct glass compositions with different coefficients of thermal expansion;
• cutting or milling said fibers into nodules having a size of from 1/4 inch to 1 inch;
• and
• collecting said nodules into a container and compressing said nodules to a density of 8 to 18 pcf (128 to 288 Kg/m.sup.3) within said container.

A method of making a pourable or blowable loose-fill insulation product comprising the steps of:

• providing irregularly-shaped glass fibers which are formed from two distinct glass compositions with different coefficients of thermal expansion;
• chopping said fibers in-line with a chopping device to form nodules having a size of about 1/2 inch;
• and
• collecting said nodules into a container and compressing said pieces to a density of from about 8 to 18 pcf (128 to 288 Kg/m.sup.3) within said container.