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Cellulose pres
 

Cellulose pres

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    Cellulose pres Cellulose pres Presentation Transcript

    • Cellulose Insulation Insulating with recycled paper
    • 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
    • Why Cellulose?
      • In 2008, paper = 31% of the municipal waste stream in U.S.
      epa.gov
    • 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/
    • Production
        • VIDEO:
        • http://www.youtube.com/watch?v=6FWOwvthj34
    • 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
    • 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
    •  
      • 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/
    • Potential Hazards
      • Dust during installation
        • Wear mask - boric acid can irritate mucous membranes
        • Wet installation
      • Indoor Air Quality
        • Concerns have not been quantified
    • 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.
    • 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.