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<TITLE>Re: [Greenbuilding] Which insulation? How to install?</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>If you don’t have a cavity to allow a Roxul Comfort Batt, how about Roxul’s semi-rigid boards, as substitute for a foam board? Check for commercial suppliers for their Drainboard - <a href="http://www.roxul.com/building+envelope/products/roxul+drainboard%c2%ae">http://www.roxul.com/building+envelope/products/roxul+drainboard%c2%ae</a><BR>
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On 5/13/12 2:04 PM, "RT" <<a href="archilogic@yahoo.ca">archilogic@yahoo.ca</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT SIZE="2"><FONT FACE="Consolas, Courier New, Courier"><SPAN STYLE='font-size:10pt'>On Sun, 13 May 2012 13:38:36 -0400, Corwyn <<a href="corwyn@midcoast.com">corwyn@midcoast.com</a>> wrote:<BR>
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> What insulation would people recommend for a short crawl space?<BR>
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Not sure where the insulation is intended to be placed (ie joist cavities, <BR>
underside of joists, outside of footprint perimeter etc) but I'd say "No" <BR>
to the question whether or not air-entrained concrete would be an option, <BR>
assuming a typical lightweight concrete mix exceeding 110 pcf density. <BR>
Check the ASRHAE Handbook for R-values at the lower end of densities and <BR>
I'm pretty sure that it'd be substantially below what you're looking for.<BR>
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I don't think that any foamed plast-ecchhh! would be a good idea either <BR>
due to the risk of boring/tunneling/destruction by ants. (ie insulation in <BR>
ground contact with not protective barrier.)<BR>
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Roxul would likely be a suitable option whatever the placement since it <BR>
does have a capacity to drain, is fire/insect-proof but "likely" is the <BR>
best one can say without knowing specifics.<BR>
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An off-the-wall thought:<BR>
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Are mussel shells readily available in your locale ?<BR>
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If "yes| would placing a moisture barrier on the ground under the <BR>
building, then casting an insulated-core grade beam around the perimeter <BR>
of the building and then filling the space (from holes drilled in the <BR>
floor) from above with mussel shells be something that might be made to <BR>
work ?<BR>
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