[RE-wrenches] Attaching Array To or Through Ply

Wed Mar 29 11:46:42 PDT 2023

We've found that in the Bay Area that deck-mount solutions typically pencil
out structurally (via a structural professional engineer) as long as the
deck is 1/2" plywood or thicker, assuming we have all the info on how the
roof is constructed. The big assumption is that we can get all that roof
construction info, which can be difficult for existing structures.

We haven't taken the plunge yet on the flahingless deck mount products like
the Sunmodo Nanomount or Unirac Flashloc Duo. I do think that they offer
several significant advantages including not needing to find rafters, thus
virtually eliminating missed pilot holes, and not disturbing the comp
shingle by eliminating prying up the courses to insert the flashing.

August
Luminalt

On Wed, Mar 29, 2023 at 11:34 AM Solar Energy Solutions via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> We like Spider Rax… with the flashing!
>
> Spider-Rax PV Solar Mounting <https://spiderrax.com/>
> spiderrax.com
> <https://spiderrax.com/> <https://spiderrax.com/>
>
>
> *Andrew Koyaanisqatsi*
> President
>
>
> *Solar Energy Solutions, Inc.The BRIGHT CHOICE*
>
> *Since 1987,** helping you and your *
> *Portland neighbors move** towards an environmentally sustainable future.*
>
>
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> On Mar 29, 2023, at 11:04 AM, Jerry Shafer via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
> Wrenches
> Sounds like a SIP's type product, there are quite a few multi hole
> attachment bases that are designed for SIP's. Most will have a larger base,
> lots of holes for screws to attach that do not require rafters underneath
> to attach.
> Fun times
>
> On Wed, Mar 29, 2023, 8:30 AM frenergy via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Matt,
>>
>>             I guess my questions are 1/2" plywood or 5/8" and how thick
>> is the foam?  Oh and I assume its nominal 2X6 T&G?  Do you know how the
>> plywood is attached?.....through the foam into the T&G?... to stringers,
>> nailers or whatever they're called?
>>
>> Bill
>>
>> Feather River Solar Electric
>> Bill Battagin, Owner
>> 4291 Nelson St.(shipping)
>> 5575 Genesee Rd. (USPS, UPS)
>> Taylorsville, CA 95983
>> 530.284.1925 Office/ 530.258.1641 Cell
>> CA Lic 874049
>> Solar powered since 1982
>>
>> On 3/29/2023 7:53 AM, Dave Tedeyan via RE-wrenches wrote:
>>
>> Hi Matt,
>> I've used these in the past when on a comp roof and there was no good way
>> to get into the rafters (or TJI's in this case)
>> https://sunmodo.com/nanomount/
>>
>> You might want to replace the screws with something shorter and beefier
>> though to get more grip if you are only going into 1/2" plywood.
>>
>> Cheers,
>> Dave
>>
>> On Wed, Mar 29, 2023 at 10:38 AM Matt Sherald via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Hi All,
>>>
>>> I've run into a roof-mounted job where the roof is built-up with the
>>> following:
>>>
>>> Comp shingle
>>> Plywood
>>> Foam board
>>> T&G (roof deck, but also interior ceiling)
>>>
>>> The beams that hold the t&g up are wide-spaced and not convenient for
>>> fastening the full extent of the array.
>>>
>>> This being the case, I was considering other fastening options and am
>>> writing to pick the collective brain of the Wrenches to see how others have
>>> addressed similar situations.
>>>
>>> One thought I had was to use the PLP Easy Mounting Foot and I'd be glad
>>> for any opinions on that or another solution.
>>>
>>> -Matt
>>>
>>> --
>>> Matt Sherald
>>> PIMBY Energy, LLC
>>> 304-704-5943
>>>
>>>
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>>
>> --
>> [image: Logo] <https://www.sungineersolar.com/>
>> Dave Tedeyan, P.E.
>> Owner | Sungineer Solar
>> p: he | him | his
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