<div dir="ltr">"If you place a flat object on top of roofing without an uphill material lapping over the downhill object, you are not flashing. "<div><br></div><div>By that logic, an Oatey boot is not a flashing for a plumbing vent on a metal roof.</div><div><br></div><div>Just sayin'...</div><div><br><div class="gmail_extra"><br>Jason Szumlanski</div><div class="gmail_extra"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 7, 2015 at 2:19 PM, William Miller <span dir="ltr"><<a href="mailto:william.miller@millersolar.com" target="_blank">william.miller@millersolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="white" lang="EN-US" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Ray:<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">I have to respectfully disagree with your semantics. A flashing is an overlapping of roofing materials such that gravity will direct rain and melt water off of the roof. This is a universally accepted waterproofing method that does not depend on any sealant material. The concept is as ancient as the first, crude, thatched roof.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">If you place a flat object on top of roofing without an uphill material lapping over the downhill object, you are not flashing. <u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">What you have described is sealant-dependent weatherproofing. Regardless of the quality of the sealant, or lack thereof, I don’t think you can call it a flashed attachment.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">(The overarching point is a flashed attachment does not depend on a sealant. Any sealant has a finite lifespan. Removing the sealant variable from the equation results in more lasting installation.)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"> <u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">Sincerely,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d">William Miller<u></u><u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><img width="64" height="28" src="cid:image003.jpg@01D0D101.8C051460" alt="Gradient Cap_mini"><br>Lic 773985<br><a href="http://www.millersolar.com/" target="_blank"><span style="color:blue">millersolar.com</span></a><br><a href="tel:805-438-5600" value="+18054385600" target="_blank">805-438-5600</a><u></u><u></u></span></p></div><p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:#1f497d"><u></u> <u></u></span></p><div><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";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Ray Walters<br><b>Sent:</b> Friday, August 07, 2015 10:34 AM<br><b>To:</b> RE-wrenches<span class=""><br><b>Subject:</b> Re: [RE-wrenches] to flash or not to flash<u></u><u></u></span></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">My opinion is that if the L foot has enough surface area it constitutes a flashing, and that large flashings can actually cause more damage to the roof than they prevent.<span class=""><br>I also agree that an attachement doesn't constitute a penetration. I just finished an install on a metal roof with hundreds of screw holes. We added a few more screw holes, and ours have 20 times the sealant surface area. We did run a 1" conduit through the roof, and since it was an actual penetration, we used a very expensive flexible boot flashing.<br>Personally, I think we need about a 3"x3" or 4" x 4" L foot with a double stick butyl tape on the bottom, and all will be well.<br>I realize that the OP was referring to asphalt, but I will flash other roof types that don't do well with L feet ( like shake).<br><br><u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p></div></div><br>_______________________________________________<br>
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