Fiberglass insulation, which consists of extremely fine glass fibers, is one of he most commonly used insulation materials. Fiberglass insulation is made in blanket form(known as batts) and also loose fill , which is generally blown in attics by professional contractors, to insulate the attic floor.
Batts come in various lengths and widths depending on where you are having it installed. The thickness of the fiberglass determines the R-value of the insulation and where it can be installed. As with all insulations, the higher the R value the greater the resistance to heat flow. The more resistance to heat flow your insulation provides, the lower your heating and cooling costs.
Proper installation is required to achieve the highest possible thermal performance and it is best to have a certified professional install the insulation. Fiberglass batts should not be compressed when installed and gaps should always be avoided to ensure top performance of the insulation. Safety precautions should always be enforced when installing insulation.