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Between different materials! Is it anyone's experience that simply
layering materials achieves significant resistance to heat loss?
(that's not the same as "wear layers") If that works we have a new
world of compact insulation solutions ahead of us. The followup
comment about tile or other "overlays" versus an intimately bonded
new layer was about there being no air gap or other materials to add
a little resistance in the latter case. And earth vs non-earth, that
is a philosophical choice not an issue of "thermal mass". Am I
correctly recalling that the original "slab" was two inches as well?
It is seriously cracked, and you are wondering if adding a second
relatively thin, apparently (also?) un-reinforced layer may cause
problems. What is under the current concrete layer?<br>
<br>
<br>
<div class="moz-cite-prefix">On 13-05-13 10:06 AM, Vadurro, Rob,
EMNRD wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
believe the concern is the transfer of heat between
different materials. I can’t remember where I saw it, but
there was a table showing the transferring heat between base
and finish materials, say tile to concrete slab below in
passive solar conditions and the rate of transfer was much
less than one might think. The joint between the two impeded
the heat transfer, in other words. I would think an acrylic
additive may impede the transfer even more. The best is
always to not cover the slab, only color it, if heat
retention in the slab is the goal.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Rob
Vadurro, AIA<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Park
Architect<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">New
Mexico State Parks<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">1220
South Saint Francis Drive<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Santa
Fe, NM 87505<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">505-476-3383<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">505-476-3361
fax</span><span style="font-family:"Baskerville Old
Face","serif";color:#1F497D"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Greenbuilding
[<a class="moz-txt-link-freetext" href="mailto:greenbuilding-bounces@lists.bioenergylists.org">mailto:greenbuilding-bounces@lists.bioenergylists.org</a>]
<b>On Behalf Of </b>Topher<br>
<b>Sent:</b> Monday, May 13, 2013 8:39 AM<br>
<b>To:</b> Green Building<br>
<b>Subject:</b> Re: [Greenbuilding] Passive solar
home--concrete overlay re thermal mass<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 5/13/2013 1:07 AM, KTOT (g) wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal">Does anyone have experience or knowledge
about this? Using or not using a concrete overlay product
for the top layer of a floor for thermal mass, vs. a plain
darkly stained concrete slab
<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><br>
A concrete overlay product is likely to be roughly similar in
thermal characteristics to a concrete slab. Meaning that you
will just have a thicker thermal mass. It seems unlikely that
you should be worried about
<i>too much</i> thermal mass in a passive solar house. The
overlay product might have a lower specific heat, or
conductivity, wither of which will reduce it's effectiveness
somewhat. Remember to stick with a dark color.<br>
<br>
Thank You Kindly,<br>
<br>
Corwyn<br>
<br>
<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>Topher Belknap<o:p></o:p></pre>
<pre>Green Fret Consulting<o:p></o:p></pre>
<pre>Kermit didn't know the half of it...<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.GreenFret.com/">http://www.GreenFret.com/</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:topher@greenfret.com">topher@greenfret.com</a><o:p></o:p></pre>
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