[Greenbuilding] Which insulation? How to install?

[Jason Holstine]

If you don¹t have a cavity to allow a Roxul Comfort Batt, how about Roxul¹s
semi-rigid boards, as substitute for a foam board?  Check for commercial
suppliers for their Drainboard -
http://www.roxul.com/building+envelope/products/roxul+drainboard%c2%ae


On 5/13/12 2:04 PM, "RT" <archilogic at yahoo.ca> wrote:

> On Sun, 13 May 2012 13:38:36 -0400, Corwyn <corwyn at midcoast.com> wrote:
> 
>> > What insulation would people recommend for a short crawl space?
> 
> Not sure where the insulation is intended to be placed (ie joist cavities,
> underside of joists, outside of footprint perimeter etc) but I'd say "No"
> to the question whether or not air-entrained concrete would be an option,
> assuming a typical lightweight concrete mix exceeding 110 pcf density.
> Check the ASRHAE Handbook for R-values at the lower end of densities and
> I'm pretty sure that it'd be substantially below what you're looking for.
> 
> I don't think that any foamed plast-ecchhh! would be a good idea either
> due to the risk of boring/tunneling/destruction by ants. (ie insulation in
> ground contact with not protective barrier.)
> 
> Roxul would likely be a suitable option whatever the placement since it
> does have a capacity to drain, is fire/insect-proof but "likely" is the
> best one can say without knowing specifics.
> 
> An off-the-wall thought:
> 
> Are mussel shells readily available in your locale ?
> 
> If "yes| would placing a moisture barrier on the ground under the
> building, then casting an insulated-core grade beam around the perimeter
> of the building and then filling the space (from holes drilled in the
> floor) from above with mussel shells be something that might be made to
> work ?
> 

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