<div dir="ltr">re the GB advisor article:<div><br></div><div>some people recoil at the notion of large amounts of sub slab insulation, but this is about heat loss via conduction, rather than convection loss through walls and roofs. Heat loss to soil is different than heat loss to air. </div>
<div><br></div><div>Conversely (assuming you are looking at net heat loss through the building envelope), increasing, say wall insulation, to compensate for heat loss under a slab, requires more and more complex assemblies. It also requires either expanding the footprint--adding roof area, increasing tax assessments, etc--or reducing interior area. So there can be some advantages to dumping some more insulation where it does not have a big impact on other building assemblies.</div>
<div><br></div><div>the downside is that there seems to be no reasonable substitute for foam. My present thinking (not yet implemented) is to put the slab on the ground where it belongs, and insulate on top of it, and cover with a floating floor system. let point loads penetrate as they must. </div>
<div><br></div><div>-AA</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 20, 2013 at 7:59 PM, Sacie Lambertson <span dir="ltr"><<a href="mailto:sacie.lambertson@gmail.com" target="_blank">sacie.lambertson@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">If you can open this, herewith an interesting Passive Haus article:<br>
<br><a href="http://www.nytimes.com/2013/08/15/garden/the-passive-house-sealed-for-freshness.html?pagewanted=1&hpw" target="_blank">http://www.nytimes.com/2013/08/15/garden/the-passive-house-sealed-for-freshness.html?pagewanted=1&hpw</a><br>
<br></div><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">juxtaposed against this discussion suggesting as an alternative:<br><br><a href="http://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/pretty-good-house" target="_blank">http://www.greenbuildingadvisor.com/blogs/dept/guest-blogs/pretty-good-house</a><span class="HOEnZb"><font color="#888888"><br>
<br></font></span></div><span class="HOEnZb"><font color="#888888"><div class="gmail_default" style="font-family:verdana,sans-serif;font-size:small">Sacie<br></div></font></span></div>
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