Insulation: Fiberglass, Mineral, Wool

Rigid Fibrous or Fiber Insulation (Fiberglass, Mineral - rock or slag, Wool)

Fiberglass (or fiber glass)—which consists of extremely fine glass fibers—is one of the most commonly used insulation materials. It's used in two different insulation forms:blanket (batts and rolls) and loose-fill.

The term "mineral wool" typically refers to two types of insulation material:

  • Rock wool - a man-made material consisting of natural minerals like basalt or diabase
  • Slag wool - a man-made material from blast furnace slag (the scum that forms on the surface of molten metal).

Mineral wool contains an average of 75% post-industrial recycled content. It doesn't require additional chemicals to make it fire resistant, and it can be used in two different insulation forms: blanket (batts and rolls) and loose-fill.

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