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<div class=Section1>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Quick item on Approach #1 bares repeating – Sika is
incompatible with asphalt shingle roofing according to the manufacturer…<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>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Glenn Burt<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Technical Specialist<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Renewable Power Systems, LLC<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>PO Box 967<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Averill Park, NY 12018<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>V: 518-674-5808<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>C: 518-810-3174<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>F: 518-514-1175<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>E: <a href="mailto:gburt@RPSPower.com"><span style='color:blue'>gburt@RPSPower.com</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><a href="http://www.RPSpower.com"><span style='color:blue'>www.RPSpower.com</span></a><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>
<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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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Peter
Parrish<br>
<b>Sent:</b> Monday, September 15, 2008 12:28 PM<br>
<b>To:</b> 'RE-wrenches'<br>
<b>Subject:</b> Re: [RE-wrenches] Stanchions for Comp Shingle Roofs<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='color:black'>I’m not sure if we have
discussed this before, but I would like to get opinions on the relative merits
of the following two approaches to setting stanchions and flashing them in for
a roof mounted PV system:</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>Existing comp shingle roof in good
condition. Professional Solar Fast-Jacks (or similar stanchions that result in
a ¾” to 1” post to which to attach rails). I am not endorsing
ProSolar products, I just wanted a specific example to work with.</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>Approach #1: Lag stanchions
directly onto existing comp shingle roof; cut a inverted “U” into
the top layer of shingle; slip in Oatey-style flashing (9”x12”,
with an elastomeric ring); seal exposed vertical edges of flashing with a bead
of high quality caulk (Sika 1A)</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>Approach #2: Remove shingles down
to the felt; lag stanchion; replace shingles incorporating full-sized
(15”x18”) flashing and seal top of flashing with high-quality
caulk.</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>Obviously, approach #2 takes
longer and costs more, but does it confer commensurate benefit? If the
resulting stanchion/flashing were exposed to the elements, I would tend to
favor the latter approach; and if we were dealing with new construction the
difference in time and money would not be significant. However, if the
stanchion/flashing lies directly underneath a PV module, it will be shaded from
the deleterious effects of UV sunlight and will not receive any direct rain or
snow accumulation. Under these specific circumstances, I would argue that
approach #1 should be more than adequate and last at least as long as an
existing comp shingle roof. </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'>For those of you who haven’t
seen the Fast-Jack/Oatey approach, you might want to look at <a
href="http://www.prosolar.com/Oateys.htm">http://www.prosolar.com/Oateys.htm</a>.
</span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> </span><o:p></o:p></p>
<p class=MsoNormal><span style='color:black'> - Peter</span><o:p></o:p></p>
<div>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:navy'>Peter
T. Parrish, Ph.D., President<br>
California Solar Engineering, Inc.<br>
820 Cynthia Ave., Los Angeles, CA 90065<br>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br>
CA Lic. 854779, NABCEP Cert. 031806-26<br>
peter.parrish@calsolareng.com</span><span style='font-size:10.0pt;font-family:
"Arial","sans-serif";color:blue'> </span><o:p></o:p></p>
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