[RE-wrenches] to flash or not to flash

[Jay]

Hi Ray

Can you elaborate on how a large flashing can cause more damage than it prevents?  

Thanks
Jay 
Peltz power

Sent from my iPhone

> On Aug 7, 2015, at 10:34 AM, Ray Walters <ray at solarray.com> wrote:
> 
> My opinion is that if the L foot has enough surface area it constitutes a flashing, and that large flashings can actually cause more damage to the roof than they prevent.
> I also agree that an attachement doesn't constitute a penetration.  I just finished an install on a metal roof with hundreds of screw holes.  We added a few more screw holes, and ours have 20 times the sealant surface area.  We did run a 1" conduit through the roof, and since it was an actual penetration, we used a very expensive flexible boot flashing.
> Personally, I think we need about a 3"x3" or 4" x 4" L foot with a double stick butyl tape on the bottom, and all will be well.
> I realize that the OP was referring to asphalt, but I will flash other roof types that don't do well with L feet ( like shake).
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer, 
> Licensed Master Electrician
> Solar Design Engineer
> 303 505-876
>