Products

Fiberglass

Manufacturing Process:

Fiberglass is a member of the mineral wool family. As with all mineral wool, the raw materials are inorganic. Molten materials made primarily of silica or glass are flowed onto a rapidly spinning rotor bowl. The sides contain many holes. As the molten material flows through the holes, high-velocity jets form it into glass fibers. A binder, generally a phenolic resin, is applied. The treated fibers are then collected on a moving belt which passes through a curing oven. The resulting product has a high air content with a low density and a high resiliency. This allows the material to be compressed and have the ability to rebound to its original thickness.

Water Permeability and Moisture Absorption:

Loose fill, batt and wall-applied, loose-fill fiberglass are permeable to water to the extent of over 100 perm/inch. Fiberglass fibers are non-hygroscopic. Any moisture lies on the surface of the fibers and not inside them. Water absorption averages no more than 1% by weight. No capillarity is apparent.

Fire Resistance:

The glass fibers are not flammable per se. Most of the facing, Kraft or standard foil, are flammable. Content and Shipping: Most fiberglass contains 30% to 40% recycled glass. The bulk of the remaining product comes from sand. As the product is compressible, many cubic feet of material can be inserted into a bag, resulting in less trucking and packaging.

Content and Shipping:

Most fiberglass contains 30% to 40% recycled glass. The bulk of the remaining product comes from sand. As the product is compressible, many cubic feet of material can be inserted into a bag, resulting in less trucking and packaging.

Fiberglass comes in many different R value and thickness selections. Batts are : 3 1/2" R11, R13 or R15, 5 1/2" R21, 6" R19, 8" R25 or R30 High Density 9 1/2" R30, 10" R38 High Density and 12" R38. Unfaced, Kraft, Foil or FS25 facings are available product choices. Loose fill fiberglass is made for attic blow-in or for wall blow-in.

Fiberglass batts are installed by hand. Weather factors are not an issue. As they are dry, no curing time is needed. They are air permeable and have a high perm rating, a vapor barrier and an air barrier are recommended.