[RE-wrenches] galvanized barn roofing

[penobscotsolar at midmaine.com]

Does anyone have experience mounting arrays on barns with 24" wide
galvanized roofing (not standing seam)? It is flat, not corrugated, but
has an overlapping edge on either side. It's pretty much a standard on
barn roofs around here, but I hesitate to penetrate any metal roof. How
have others dealt with this type of material?

Thanks for any information,
Daryl

Daryl DeJoy
NABCEP Certified PV installer
Penobscot Solar Design