2007 Archived May 16, 2008, at the Wayback Machine. Home Insulation: Hearings before the Subcommittee on oversight and investigations of the committee on interstate and foreign commerce; House of Representatives Ninety-fifth Congress; Second Session; February 21, 22, and 23, 1978 Serial. Fire retardation edit The borate treatment also gives cellulose the highest (Class I) fire safety rating. Recommendations against using vapor barriers with cellulose insulation are supported by studies, even though they classify cellulose as vapor permeable. Now cover the cups with the different types of insulation you are testing. Embodied energy edit The embodied energy of cellulose insulation is the lowest of the popular insulation types. Toxicity of the raw materials of insulation types is typically highest during manufacture or installation.
Cellulose is approximately three times denser than fiberglass, providing a slight improvement in sound reduction. This method stops the stack effect and convective loops in wall cavities. This two page document reviews the facts and debunks myths about fire performance of insulation materials. 95-81 Enforcement of a cellulose insulation safety standard; Hearings before the Subcommittee on oversight and investigations and the Subcommittee on Consumer Protection and Finance of the committee on interstate and foreign commerce; House of Representatives Ninety-fifth Congress; Second Session; April 19, 1978; Serial. Compared to closed cell, Polyurethane foam insulation (R5.5.5 per inch cellulose has a lower R-value per inch, but is much less expensive; foam has a higher cost per equivalent R-value. R-value, rule, placing clear limitations on the claims that manufacturing and marketing firms can make about their product. By, marshall Brain, insulation keeps hot stuff hot and cold stuff cold. It is applied with a very small amount of water to activate an adhesive of some kind. Cellulose manufacturers do not recommend the installation of a vapor barrier with cellulose. In addition, wet-spray allows for an even better seal of the insulated cavity against air infiltration and eliminates settling problems.
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