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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><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:12.0pt;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></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;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></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Courier New";color:black'>THANKS VERY MUCH – you’re all great!<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Courier New";color:black'>See <a href="http://www.concretenetwork.com/concrete/snow_melting_systems/"><span style='color:black'>http://www.concretenetwork.com/concrete/snow_melting_systems/</span></a> . <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Courier New";color:black'>Nice design manual here <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Courier New";color:black'><a href="http://www.doyouuponor.com/~/media/Extranet/Files/manuals/SIMeltMan2003.aspx?sc_lang=en"><span style='color:black'>http://www.doyouuponor.com/~/media/Extranet/Files/manuals/SIMeltMan2003.aspx?sc_lang=en</span></a><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-family:"Courier New";color:black'>Cheers, Mike</span><span style='font-size:12.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>