Insulation: Loose Fill

Loose Fill (Fiberglass, Cellulose, Mineral - rock or slag, Wool)

Loose Fill Insulation - Fiberglass, Cellulose, WoolUsed in new construction and in older existing homes, typically in hard-to-reach areas.

Among the options available are Owens Corning PINK FIBERGLAS™ Insulation and CertainTeed Blowing Wool Insulation. These products:

  • Thermally efficient
  • Excellent sound control
  • Won’t settle
  • Last for life of the home to reduce energy demand and costs
  • Environmentally sustainable
  • Non combustible
  • Non corrosive
  • Won’t rot or decay
  • Won’t absorb moisture or support fungus growth
  • GREENGUARD® Children & Schools Certified (CertainTeed)
  • Limited lifetime warranty
  • Formaldehyde-Free
Cellulose is very good at fitting around items in walls like pipes and wiring, leaving few air pockets that can reduce the overall efficiency of the wall. Dense pack cellulose can seal walls from air infiltration while providing the density to limit convection, when installed properly. The University of Colorado School of Architecture and Planning did a study that compared two seemingly identical test structures, one with cellulose and the other with fiberglass. The cellulose structure had used 26.4% less energy to heat. It also was shown to tighten the structure more than 30%. Subsequent real world surveys have cellulose performing 20-30% better at reducing energy used for heating than fiberglass.

Compared to foam insulation, cellulose has a lower R-value per inch, but is much less expensive; foam generally has a higher cost per equivalent R-value.

Sound insulation

Noise reduction is achieved in three ways with cellulose. The first is that cellulose completely fills cavities leaving few air pockets for sound to travel in. The second is the cellulose materials ability to trap air. The significant difference between noise reduction with cellulose and fiberglass is its density. Cellulose is approximately three times denser then fiberglass. This helps deaden the sound through walls and between floor levels.

 

Sources: http://en.wikipedia.org/wiki/Cellulose_insulation,
http://www.certainteed.com/products/insulation/index/317364

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