<html><head><base href="x-msg://379/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">My thoughts are, don't do it: an outdoor slab isolated from the earth will likely keep snow longer. Much truba, little, if any, gain,<div>snow melting notwithstanding. <br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div>Clarke Olsen</div><div><br></div><div><br></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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<br><div><div>On Sep 22, 2011, at 3:27 PM, Michael Zyla wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-US" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Courier New'; color: black; ">Cement sidewalk, 3 feet wide, 18 feet long, probably two cement joints. Can someone recommend the insulation type, brand, etc. to place under the slab? My cars will drive over this sidewalk to gain access to two-car driveway about 25 feet long X 18 feet wide. The driveway will also have snow melt. Concerned insulation will not support slab and crack when loaded by cars.<o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Courier New'; color: black; ">Can buy, at big box store, 2” thick Owens Corning Foamular Extruded Polystyrene (XPS) Foam Insulation F-150 2 in. x 48 in. x 96 thermal performance at r-5 per in. Sold f</span><span style="font-size: 12pt; font-family: 'Courier New'; color: black; ">or exterior wall sheathing, wall furring, perimeter/foundation, cavity wall, crawlspace, pre-cast concrete, UNDER SLAB and other applications. Will use insulation vertically on sides of slabs, but should these be covered with cement, maybe 2” on top of vertical insulation? Any “watch outs” about conditioning bed for slab?<o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Courier New'; color: black; ">Slab thickness? Rebar grid size, style? Other comments? Also, any experience with tubing? Copper, PEX? Any special PEX? I’m aiming for hydronic rather than electric. Tubes crossing joints? Insulate tubes traveling through joints? <o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Courier New'; color: black; ">THANKS VERY MUCH – you’re all great!<o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Courier New'; color: black; ">See<span class="Apple-converted-space"> </span><a href="http://www.concretenetwork.com/concrete/snow_melting_systems/" style="color: blue; text-decoration: underline; "><span style="color: black; ">http://www.concretenetwork.com/concrete/snow_melting_systems/</span></a><span class="Apple-converted-space"> </span>. <o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Courier New'; color: black; ">Nice design manual here<o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Courier New'; color: black; "><a href="http://www.doyouuponor.com/~/media/Extranet/Files/manuals/SIMeltMan2003.aspx?sc_lang=en" style="color: blue; text-decoration: underline; "><span style="color: black; ">http://www.doyouuponor.com/~/media/Extranet/Files/manuals/SIMeltMan2003.aspx?sc_lang=en</span></a><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-family: 'Courier New'; color: black; ">Cheers, Mike</span><span style="font-size: 12pt; font-family: 'Courier New'; color: black; "><o:p></o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); "><o:p> </o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0.25in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0.25in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></span></div><div style="margin-top: 0in; margin-right: 0in; margin-left: 0in; margin-bottom: 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></div></div>_______________________________________________<br>Greenbuilding mailing list<br>to Send a Message to the list, use the email address<br><a href="mailto:Greenbuilding@bioenergylists.org" style="color: blue; text-decoration: underline; ">Greenbuilding@bioenergylists.org</a><br><br>to UNSUBSCRIBE or Change your List Settings use the web page<br><a href="http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org" style="color: blue; text-decoration: underline; ">http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org</a></div></span></blockquote></div><br></div></body></html>