[RE-wrenches] Flashed Footing Requirements
R Ray Walters
ray at solarray.com
Thu Jun 24 18:35:06 PDT 2010
I agree Peter, the seals are not exposed like a normal flashing, so that will help. But the Oateys will still see some reflected UV radiation. I've seen other parts "protected by the array", totally deteriorate in 5 years (UV resistant tie wraps anyone?). In Hawaii, roofing supply houses only sell replacement Oatey seals, but not the flashings anymore. The deterioration could be due to other factors like humidity, not just UV.
Also consider the aesthetics of installations with Oatey flashings with the panels flying 6" to 8" off the roof.
Sure the cooling is better, but it's not selling many systems down the block. It's a clunky looking install.
The Eco flashing stuff that Dave Palumbo pointed out looks good.
As Nick mentioned, I too found the Quick mount flashing to be weak at the rivet, although as long as the lag is tightened, I don't think it would leak.
R. Walters
ray at solarray.com
Solar Engineer
On Jun 24, 2010, at 6:17 PM, Peter Parrish wrote:
> Let’s see. “25 years out in the sun”. Did the roof last the 25 years? If it didn’t, why weren’t the Oatey flashings replaced as part of the re-roof at $4 a pop?
>
> But I digress. All the flashings on a normal, well-designed are UNDER THE PV ARRAY. No UV, no rain, but some extra heat, no doubt. My wag is that Oatey flashings as part of a PV array will outlast most of the roofs they are designed to protect.
>
>
> Peter T. Parrish, Ph.D., President
> California Solar Engineering, Inc.
> 820 Cynthia Ave., Los Angeles, CA 90065
> CA Lic. 854779, NABCEP Cert. 031806-26
> peter.parrish at calsolareng.com
> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>
>
> From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nick Soleil
> Sent: Thursday, June 24, 2010 3:33 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Flashed Footing Requirements
>
> Aloha Wrenches:
> Do you add a rubber boot to the top of the Oatey Flashings. Do you think the Oatey Solar Flashings, which utilize a rubber boot, will stand up to weathering below an array.
>
> Nick Soleil
> Project Manager
> Advanced Alternative Energy Solutions, LLC
> PO Box 657
> Petaluma, CA 94953
> Cell: 707-321-2937
> Office: 707-789-9537
> Fax: 707-769-9037
>
>
> From: Todd Cory <toddcory at finestplanet.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Sent: Thu, June 24, 2010 2:34:29 PM
> Subject: Re: [RE-wrenches] Flashed Footing Requirements
>
> I have seen 25 year old oaty flashings rot out in the sun too. I think caulked L-feet is a more long lasting solution to roof mounts.
>
> Todd
>
>
> Blair May wrote:
> Whats wrong with doing it right the first time? Flashing is the only way to insure that you don't have to use that liability insurance & that the install is water tight. I would speak to the inspector & try to work out proper flashings installed in the future & see if he will waive the removal & replacment of the exisiting installs.
> Welcome to my world where we loose jobs regularly to other installers that do not use proper flashing methods.
> Yeah it does increase the cost, but the install should have a life cycle of 25 years.
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nick Soleil
> Sent: Wednesday, June 23, 2010 8:10 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] Flashed Footing Requirements
>
> Who can help:
> One of our local jurisdictions, City of Petaluma, is beginning to require flashed footings under all solar arrays. I think that some flashed footings are better than the Unirac L feet or Prosolar's TileTrac foot, but the flashed footings cost a lot more $, and some flashed footing products seem flawed (less watertight) They are asking me to uninstall two commissioned systems from last week, and replace the footings with flashed Fast Jacks, even though the documents detailed the penetration method.
> I am looking for some good info that supports flexible installation methods, including caulked footings. Our industry has come a long way from the early days of racking on slotted angle iron with steel L-brackets for feet, but those experiences tend to give me confidence in continuing to use caulked footings.
> Nick Soleil
> Project Manager
> Advanced Alternative Energy Solutions, LLC
> PO Box 657
> Petaluma, CA 94953
> Cell: 707-321-2937
> Office: 707-789-9537
> Fax: 707-769-9037
>
>
>
> yy
>
>
>
>
>
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> Todd Cory
> KE6SXS
> toddcory at finestplanet.com
> Mt. Shasta Energy Services
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