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GSBN:Re: : slab edge insulation


I've never used the perlite/cement mix of which you speak but I do wonder how well the material drains since it is presumably being used at/below grade where it is likely to suck up ground moisture quite readily (and hence compromise its value as insulation) due to the large percentage of void in the low-density material ?

(ie Expanded perlite is highly absorptive (2-90% by volume) and quite vapour-permeable (32 perms)...don't know what the properties are when combined with cement)

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Robert W. Tom
Kanata, Ontario, Canada

please visit:  http://www.theHungerSite.com daily

Date: 3 Mar 2003 13:07:55 -0600
From: bainbridge bainbrid@...

foamed concrete insulation

Perlite concrete can be made with a dry density of 20 lb/ft3(320
kg/m3) The lower the density, the higher the insulating value.

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