conduit from panels to inverter through attic or on roof?

[damage]

what are the pros & cons of running the conduit through the attic vs on the roof? i have a 2 story house and the panels will be on the back, so the conduit won't be really visible on the roof anyway... thanks

[Mike90250]

I'd run the condouit around the eves, or the side of the roof, and come back UP to a sheltered spot under the eves and then penatrate into the house. I don't like exposed holes. Roof putty only lasts so long before it leaks.

[Naptown]

You can also use what is called a solar deck.

http://www.rstcenterprises.com/soladeck/

can be mounted under a module very clean install

[andrewc]

As an installer, on a typical pitched asphalt shingled roof, I think it is almost always best to go through the attic if possible. The aforementioned Soladeck is a great product for such applications. Running conduit on a roof is ugly, and creates it's own problems of attachment points (more roof penetrations? do you flash? etc), and issues with raceways with direct exposure to sunlight [310.15(B)(3)(c)]. One local company commonly uses carflex to run down a roof, and jump over/bend around the gutters, then down the wall. It's way ugly. That said, my aesthetical preference may not be universal. Both ways can be done legally.