<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Chris:</SPAN></div>
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<div style="BACKGROUND-COLOR: transparent; FONT-STYLE: normal; FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; COLOR: rgb(0,0,0); FONT-SIZE: 16px; RIGHT: auto"><SPAN style="RIGHT: auto">I believe you can always "sandwich" insulation on top of one another. Just be careful to take into account if there is any structural cavity where steel structure peeks through the insulation.</SPAN></div>
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<div style="RIGHT: auto"><SPAN style="RIGHT: auto">John R. Aulbach, PE</SPAN></div>
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<DIV style="BORDER-BOTTOM: #ccc 1px solid; BORDER-LEFT: #ccc 1px solid; PADDING-BOTTOM: 0px; LINE-HEIGHT: 0; MARGIN: 5px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; BORDER-RIGHT: #ccc 1px solid; PADDING-TOP: 0px" class=hr contentEditable=false readonly="true"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Chris Baker <CBaker@cci-alliance.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> "equest-users@lists.onebuilding.org" <equest-users@lists.onebuilding.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> <BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [Equest-users] Question - Exterior roof insulation (DD Wizard sheet 3)<BR></FONT></DIV>
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<div class=yiv8053288582MsoNormal>I have a question regarding “Roof Surfaces” on sheet 3 of the DD Wizard – particularly the fields “Exterior Insulation” and “additional Insulation”.</div>
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<div class=yiv8053288582MsoNormal>Our roof buildup is as follows..</div>
<div class=yiv8053288582MsoNormal> </div>
<div class=yiv8053288582MsoNormal>2” standing seam aluminum panels (blue/medium)</div>
<div class=yiv8053288582MsoNormal>Carlisle WIP 401LT self adhering roof underlayment</div>
<div class=yiv8053288582MsoNormal>¾” CDX Plywood</div>
<div class=yiv8053288582MsoNormal>8.5” EPS Insulation with Z-purlins @ 48” o.c.</div>
<div class=yiv8053288582MsoNormal>Carlisle WIP 401LT self adhering roof underlayment</div>
<div class=yiv8053288582MsoNormal>5/8” densdeck roof board</div>
<div class=yiv8053288582MsoNormal>2x4 sleepers @ 24 o.c. (3.5” EPS insulation in between that)</div>
<div class=yiv8053288582MsoNormal> </div>
<div class=yiv8053288582MsoNormal>Structural steel @ 24 o.c. minimum supporting above</div>
<div class=yiv8053288582MsoNormal> </div>
<div class=yiv8053288582MsoNormal>The max exterior insulation I can select is 6 in. (R-42). Is it acceptable to select that (the max allowed) and then add additional insulation to approximate the system based on the final overall R-value?</div>
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<div class=yiv8053288582MsoNormal>(I would basically do this for each individual shell in the DD wizard, sheet 3).</div>
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<div class=yiv8053288582MsoNormal>Thank you!</div>
<div class=yiv8053288582MsoNormal> </div>
<div class=yiv8053288582MsoNormal>Chris Baker<BR>CCI CAD Drafter</div>
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