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Cellulose pres

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Transcript

  • 1. Cellulose Insulation Insulating with recycled paper
  • 2. Cellulose Timeline
    • Became commercially available 1940s
    • Became popular during 1970s
      • Concerns about fire retardant properties
      • Questionable r-value claims
    • Now accounts for about 10% of insulation market (CIMA)
    • “ Alternative” but gaining popularity
  • 3. Why Cellulose?
    • In 2008, paper = 31% of the municipal waste stream in U.S.
    epa.gov
  • 4. Composition
    • 75-85% recycled paper content (phone books, shipping boxes, newspapers, etc.)
    • Remaining 15-25% composed of natural fire retardants boric acid and/or ammonium sulfate.
    • http://insulation.sustainablesources.com/
  • 5. Production
      • VIDEO:
      • http://www.youtube.com/watch?v=6FWOwvthj34
  • 6. Boric Acid Fire Retardant
    • Powdered boric acid added to cellulose 5% by weight
    • Prevents flaming and smoldering
    • Concerns about losing effectiveness
    • 300 yrs for fire retardant to be effected
  • 7. Installation Methods
    • 1. Loose Fill
    • - Dry cellulose blown into small holes in preexisting walls.
    • - Ideal for retrofitting old homes where drywall is already in place.
    • - Works well in attics, where gravity can hold the insulation in place.
    • - Settles ~20%.
    • http://www.hgtvpro.com/hpro/bp_insulation/article/0,2617,HPRO_20150_4243847,00.html
  • 8.  
  • 9.
    • 2. Wet-Spray
    • - Ideal for newly built walls.
    • - Very little settling.
    • - Natural adhesive properties from water.
    • - Includes a bit of chlorine (concern to some).
    • - Excess buildup is trimmed down to proper thickness prior to drywall installation.
    http://insulation.sustainablesources.com/
  • 10. Potential Hazards
    • Dust during installation
      • Wear mask - boric acid can irritate mucous membranes
      • Wet installation
    • Indoor Air Quality
      • Concerns have not been quantified
  • 11. Drawbacks
    • Absorbs water, should not be installed near leaking pipes.
    • If treated with ammonium sulfate in addition to boric acid, can corrode metal if wet.
    • Settling effect of loose-fill.
  • 12. Cellulose vs. Fiberglass
    • Often compared as equivalents.
    • University of Colorado study found:
      • Cellulose R-Value 3.6-4.0/inch
      • Fiberglas R-Value 3.0-4.0/inch
      • Cellulose found to pack together tighter in cavities, allowing less air exchange.
      • 36-38% insulating outperformance.