<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi,<br>
<br>
I talked with the roofer who gave the "Best Roofing Practices for PV"
course at the NW Solar Expo, and at the Oregon Dept of Energy. I then
took his recommendation and ran it by two local roofing professionals,
who similarly approved. They recommended using the EternaBond "Tape"
product. It looks like a 1/4" thick pre-rolled roof caulking. I get
it in 2" wide rolls, or, you may be able to purchase it pre-cut. (It's
not cheap.) You peel off the plastic outer layer and put it on the
back of the L-feet. I put on a double layer. It becomes activated by
pressure, so, when you screw your stainless steel lag bolts (with
washers) into the underlaying rafters, the EternaBond will ooze up in
to fill the cavity between the washer and oval L-foot hole.<br>
<br>
I'd recommend that you allow yourself several hours to cut the
EternaBond and pre-apply it to the L-feet before bringing the hardware
on the roof. That way, only the final layer of plastic needs be
removed before screwing the L-foot onto the roof. But, be warned, even
with a top plastic layer on the "tape", the EternaBond will stick to
everything! There is no doubt that this is a much more solid,
waterproof connection than the dollops on caulking around the six
screws that must hold down every boot.<br>
<br>
Good Luck!<br>
<br>
Laura<br>
<br>
<div class="moz-signature">-- <br>
<meta content="text/html; charset=ISO-8859-1" http-equiv="content-type">
<title>signature</title>
Laura Uhler, Owner<br>
Solar Ki, LLC<br>
(541) 602-6909<br>
<a class="moz-txt-link-abbreviated" href="mailto:laura.uhler@solarki.com">laura.uhler@solarki.com</a><br>
<a class="moz-txt-link-abbreviated" href="http://www.solarki.com">www.solarki.com</a><br>
</div>
<br>
<br>
<br>
<br>
Kelly Keilwitz, Whidbey Sun & Wind wrote:
<blockquote cite="mid:C65C31F1.1C3EB%25kelly@whidbeysunwind.com"
type="cite">
<title>Metal roof support flashing</title>
<font face="Verdana, Helvetica, Arial"><span style="font-size: 12pt;">Wrenches,<br>
<br>
We install PV & SHW on a lot of flat-pan metal roofs here in the
Great Northwest. Most of these roofing seams are not amenable to S-5!
clips – and if they are we can’t trust how the roof is held down.<br>
<br>
We want to install the supports to best roofing practices. The roofers
that we’ve worked with use rubber boots that fit over vents and holes,
which seal to the roof with goop and are attached by screwing through
the ring at the base of the boot, through the roofing, into the roof
sheathing.<br>
<br>
The flashing boot around the post requires 5 to 9 more screw holes,
depending on the diameter and doesn’t conform around the standing seams
very well. Additionally, on roofs with no full sheathing deck – like
with skip sheathing, and horizontal perlins - the boot cannot attach to
the roof very securely. <br>
<br>
Although this seems necessary for situations where there is an actual
object going through the roof (e.g. conduit, pipe, and vents), I don’t
see how flashing this way will be better than simply using posts
without the boot flashing, or even L-feet, direct to the roof, with an
EPDM gasket, with one or two lag bolts predrilled into the roofing
truss or perlin, and filled with goop ‘till it squirts out.<br>
<br>
What do you do on metal roofs in these situations?<br>
<br>
Thanks,<br>
<br>
</span></font><span style="font-size: 12pt;"><font face="Arial">Kelly
Keilwitz, P.E.<br>
Whidbey Sun & Wind, LLC<br>
Renewable Energy Systems<br>
NABCEP Certified PV Installer<br>
</font></span><font face="Arial"><span style="font-size: 10.5pt;">WA
Electrical Administrator #KEILWKM923RB<br>
987 Wanamaker Rd.<br>
Coupeville, WA, 98239<br>
360.678.7131<br>
<a moz-do-not-send="true" href="sunwind@whidbeysunwind.com">sunwind@whidbeysunwind.com</a><br>
WA Electrical Contractor #WHIDBSW920MS<br>
WA General Contractor #WHIDBSW946M1<br>
</span></font><font face="Verdana, Helvetica, Arial"><span
style="font-size: 12pt;"><br>
<br>
</span></font>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Options & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
<br>
<br>
<div class="moz-signature">-- <br>
<meta content="text/html; charset=ISO-8859-1" http-equiv="content-type">
<title>signature</title>
Laura Uhler, Owner<br>
Solar Ki, LLC<br>
(541) 602-6909<br>
<a class="moz-txt-link-abbreviated" href="mailto:laura.uhler@solarki.com">laura.uhler@solarki.com</a><br>
<a class="moz-txt-link-abbreviated" href="http://www.solarki.com">www.solarki.com</a><br>
<br>
<br>
</div>
</body>
</html>