[RE-wrenches] to flash or not to flash

[Andrew Truitt]

Flash!  It provides a better, longer-lasting seal, and its a Code
requirement in most jurisdictions.  From the IBC via the Quickmount PV
website:

[image: Inline image 1]

If one chooses to attach a footing directly to the roof without an
integrated flashing then an "insurance option" is to install an 8"
step-flashing under the shingle course above the penetration.  This works
better for railed systems than railless since the whole footing assembly
can be covered by the modules.



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile <https://www.linkedin.com/in/andrewtruitt>

Company Website <http://truittreconsulting.weebly.com/>

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

<%28202%29%20486-7507>

[image: 24 copy.jpg]

"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough











On Thu, Aug 6, 2015 at 10:47 AM, Daniel Young <dyoung at dovetailsolar.com>
wrote:

> Writing the subject above, it seems like I’ve heard this question on the
> wrench list before, but I could not find it in my old email archives. Feel
> free to pint me back to the old discussion if it’s there.
>
>
>
> I’ve been using a flashing based roof attachment for 8+yrs now (quick
> mount or similar). Now we are looking at Rail-less systems  (quick rack is
> a good example). There is also a non-flashed rail-less racking from
> roof-tech http://roof-tech.us/ . I’ve always been of the opinion that
> simply crushing some sealant/gasket onto an asphalt shingle work fine at
> first (the test data from roof-tech is impressive), but would be an issue
> 10+yrs down the road (thermal expansion movement, freeze/thaw, etc). I can
> make a good waterproof seal at first by just slathering some butyl/silicone
> to an L-foot and cranking it down on the shingles, but that practice really
> disappeared 8+yrs ago.
>
>
>
> Maybe consider this a Poll: (to flash, or not to flash)
>
>
>
> With Regards,
>
>
>
> Daniel Young,
>
> NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90
>
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