[RE-wrenches] to flash or not to flash

[Daniel Young]

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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