BLOWN-IN/LOOSE-FILL INSULATION
Blown or Loose-Fill Insulation
Loose-fill insulation, also known as blown-in insulation, is blown or sprayed into place with special equipment. Blow-in fiberglass insulation is a loose-fill insulation. It’s made from molten glass that’s spun or blown into fibers and has a 20% to 30% recycled glass content.
Installers use loose-fill insulation in either open blow installations (such as attics) or closed cavity applications (such as inside walls). Blow-in insulation completely fills around pipes, wires, and other objects inside the wall cavity, eliminating costly voids and air gaps.

  • Best for attics, hard-to-reach or oddly shaped areas and already insulated areas. 
  • Usually made of fiberglass, cellulose or mineral wool. 
  • Blown or sprayed into place with pneumatic equipment. 
  • Can fill wall cavities. 
  • Can be installed over existing insulation. 
  • R-values range from R-2.2 to R-3.8, depending on the insulation material. s R-4.3 per inch. 


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One variation of fiberglass loose-fill insulation is the Blow-In-Blanket System (BIBS). BIBSS is blown in dry, and tests have shown that walls insulated with a Is system are significantly better filled than those insulated using other forms of fiberglass insulation such as batts. Call today for more information!
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