[RE-wrenches] Metal roof

[Kent Osterberg]

William,

More S5 standing seam attachments spreads the load onto more of the 
metal roof fasteners. In Oregon, the Structural Code, requires a 
standing seam attachment every 24" maximum. Since the common standing 
seam panels are 16" wide that means one attachment per seam -- a lot of 
attachments. Never had one come off even with 32" or 48" spacing, 
previous to current code, but I'm not in area that gets serious winds.

S5 also makes attachments designed for other types of metal roofs, the 
mix of discussion of standing seam clamps and clamps design to attached 
to decking or to purlins has made this topic a bit difficult to follow.

Kent Osterberg
Blue Mountain Solar



On 10/19/2020 7:15 AM, William Miller wrote:
> Friends:
>
> I have figured that the best way to improve a standing seam 
> installation is to add more S5 clips. Each seam has a finite number of 
> fasteners into the sheeting. Therefore if you attach to more seams you 
> attach to more fasteners into the deck.
>
> We double the required number of clips at the perimeters and always 
> stagger our clip pattern to attach to the maximum number of seams.
>
> Does this logic make sense?
>
> William Miller
> www.millersolar.com
>
>> On Oct 19, 2020, at 5:16 AM, Will White <will at solarenergy.org> wrote:
>>
>> 
>> It's interesting that you experienced this as I've always told 
>> customers that the roof will come off the building with the array 
>> attached before the array comes off the metal roof. Sounds like the 
>> issue was with the attachment (or lack of) between the roof and the 
>> building.
>>
>> Thanks,
>> Will
>>
>>   --
>> *Will White*
>> Curriculum Developer
>>
>>
>> e: will at solarenergy.org <mailto:will at solarenergy.org>
>> w: www.solarenergy.org <http://www.solarenergy.org/>
>> p: 802-272-3092
>>
>> NABCEP Certified PV Installation Professional
>> # 093006-34
>> Do you envision a world powered by renewable energy? Be the change 
>> <http://solarenergy.org/donate>.
>>
>>
>>
>> On Sun, Oct 18, 2020 at 5:41 PM Jason Szumlanski 
>> <jason at floridasolardesigngroup.com 
>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>
>>     I would add that S-5s are only as good as the roof. We saw a
>>     large system (not ours) that ripped the metal right off the roof
>>     during Hurricane Irma. It literally tore the meta. The panels,
>>     rails, and S-5s were still connected, sitting on the ground with
>>     chunks of metal roofing still attached to the S-5s. It was quite
>>     the mangled mess. We salvaged quite a bit, but the client built a
>>     ground rack after this.
>>
>>     To be fair, this was a totally exposed beachfront home. I don't
>>     know what the spacing was on the clamps, either.
>>
>>
>>     On Sun, Oct 18, 2020 at 12:00 PM Jerry Shafer
>>     <jerrysgarage01 at gmail.com <mailto:jerrysgarage01 at gmail.com>> wrote:
>>
>>         Wrenches
>>         I think what you said is totally true,"its only as good as
>>         the instalation" but here is where l differ, S-5's if
>>         installed correctly are no different than anything else
>>         installed on the roof.
>>         Jerry
>>
>>         On Sun, Oct 18, 2020, 8:42 AM Dave Angelini Offgrid Solar
>>         <offgridsolar at sti.net <mailto:offgridsolar at sti.net>> wrote:
>>
>>             The S5 is only as good as the installer. I have seen them
>>             come off with a string of panels on an insurance
>>             inspection I did.
>>
>>             I billed them and made another note in my journal of why
>>             the only thing that should go on a metal roof is rainwater.
>>
>>               
>>
>>             *Dave Angelini Offgrid Solar "we go where powerlines
>>             don't" http://members.sti.net/offgridsolar/
>>             <https://mailtrack.io/trace/link/1fbcd342a74271c0b7fc10aded3a5898216b29ff?url=http%3A%2F%2Fmembers.sti.net%2Foffgridsolar%2F&userId=1613865&signature=3165bd540eb26abc>
>>             e-mail offgridsolar at sti.net <mailto:offgridsolar at sti.net>
>>             text 209 813 0060*
>>
>>             On Sat, 17 Oct 2020 21:37:07 -0400, Hilton Dier III
>>             <hiltondier at gmail.com <mailto:hiltondier at gmail.com>> wrote:
>>
>>>             I'm with Jerry Shafer on this one. S-5 clamps with rails
>>>             work well without punching holes in the metal roof. If
>>>             the roof is fastened well to beefy steel C channel it
>>>             should be fine. The S-5 clamps themselves are stronger
>>>             than the roofing.
>>>
>>>             -- 
>>>             Hilton Dier III
>>>             Missisquoi River Hydro
>>>             Renewable Energy Design
>>
>> -- 
>> *Will White*
>> Curriculum Developer
>>
>>
>> e: will at solarenergy.org <mailto:will at solarenergy.org>
>> w: www.solarenergy.org <http://www.solarenergy.org/>
>> p: 802-272-3092
>>
>> NABCEP Certified PV Installation Professional
>> # 093006-34
>> Do you envision a world powered by renewable energy? Be the change 
>> <http://solarenergy.org/donate>.
>> _______________________________________________
>>

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