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<p><font face="Arial">Thanks, John.<br>
</font></p>
<p><font face="Arial">Frost protected shakkow foundation, yes. but not
t a purchased "system" for cost and delivery time issues. Am
planning to construct my own, Soil is a mixture of sand and
sandy loam. Land around me is damp, although the previous
cottage had a crawl space that was dry. Those are the concerns
with regard to insulation. Because the perimeter (and a centre
"channel" that is to support an interior load bearing wall have
to be 30psi, I will glue a 25 psi skirt around the perimeter,
with additional width at each corner. <br>
</font></p>
<p><font face="Arial">Lynelle</font><br>
</p>
<br>
<div class="moz-cite-prefix">On 2017-10-03 11:00 PM, John Salmen
wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black">Depends
on perimeter depth. Are you doing a frost protected
foundation? Or are the footings below freezing and fully
wrapped? consideration on the perimeter and bridging. I’ve
typically gone R20 on slab but R30 on perimeter.<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"
moz-do-not-send="true"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:black"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> 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>Lynelle Hamilton<br>
<b>Sent:</b> Tuesday, October 3, 2017 7:50 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:greenbuilding@lists.bioenergylists.org">greenbuilding@lists.bioenergylists.org</a><br>
<b>Subject:</b> Re: [Greenbuilding] Unifoam vs
Plastispan<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-size:13.5pt;font-family:"Gill Sans
MT","sans-serif"">Norbert, is the 50F true
when the slab is shallow (e.g. essentially on packed earth
that is 16" below grade?</span><o:p></o:p></p>
<p><span style="font-size:13.5pt;font-family:"Gill Sans
MT","sans-serif"">Lynelle</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 2017-10-03 7:19 PM, Norbert Senf
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Way high. If you do a payback analysis
for the last R-10 it is close to infinite. Ground
temperature around here is 50F, so your maximum
differential is maybe 20 degrees ............... N<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Oct 3, 2017 at 7:11 PM,
Gennaro Brooks-Church - Eco Brooklyn <<a
href="mailto:info@ecobrooklyn.com" target="_blank"
moz-do-not-send="true">info@ecobrooklyn.com</a>>
wrote:<o:p></o:p></p>
<div>
<p class="MsoNormal">R-35 under slab is high or low?<o:p></o:p></p>
</div>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal">Thanks!<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="color:#888888">Gennaro<o:p></o:p></span></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Tue, Oct 3, 2017 at 6:59
PM, John Straube <<a
href="mailto:jfstraube@gmail.com"
target="_blank" moz-do-not-send="true">jfstraube@gmail.com</a>>
wrote:<o:p></o:p></p>
<p class="MsoNormal">I am not sure what is special
about your slab, but standard XPS (25 psi max)
has been used for decades. Hence, EPS with more
than 25 psi seems odd anywhere except where a
concentrated load occurs. Remember, 25 psi is
3500 psf, which is more than most soils can
take. But to answer part of the question I have
use PlastiFab EPS of wide range of strengths
successfully for a long time, and have no
experience with Uniform.<br>
Of course insulating with R-35 under slab seems
very odd… the result of bizarre interior
conditions or bizarre calculation methods?<br>
<br>
<span class="m-8133840847980594306im">> On
Oct 3, 2017, at 6:24 PM, Lynelle Hamilton <<a
href="mailto:lynelle@lahamilton.com"
target="_blank" moz-do-not-send="true">lynelle@lahamilton.com</a>>
wrote:</span><br>
<span class="m-8133840847980594306im">></span><br>
<span class="m-8133840847980594306im">> I am
insulating under a floating pad. The engineer
has specified 25psi under the slab and 30 psi
on outer edges. I've been looking at two
products: Unifoam 25/30 and Plastifab 25/30.
Aiming for R35 under the slab. Price
differential is significant (Unifoam is nearly
$3000 more) for the house.</span><br>
<span class="m-8133840847980594306im">></span><br>
<span class="m-8133840847980594306im">> Has
anyone had experience with either product?
From the specs, Unifoam appears to absorb less
water and has less deflection, but both are
within the ASTM spec for the issue.</span><br>
<span class="m-8133840847980594306im">></span><br>
<span class="m-8133840847980594306im">> Many
thanks for any insights!</span><br>
<span class="m-8133840847980594306im">></span><br>
<span class="m-8133840847980594306im">>
Lynelle Hamilton</span><br>
<span class="m-8133840847980594306im">></span><o:p></o:p></p>
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<p class="MsoNormal">Norbert Senf<br>
Masonry Stove Builders<br>
25 Brouse Road, RR 5<br>
Shawville Québec J0X 2Y0<br>
819.647.5092<br>
<a href="http://www.heatkit.com" target="_blank"
moz-do-not-send="true">www.heatkit.com</a><o:p></o:p></p>
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