They are all insaneinformed.
Thank you.
Of course, my questions where rhetorical and I still doubt the efficiency of putting systems meant for industrial flat roofs on peaked, shingled roofs in areas which have heavy snows. I couldn’t find specs relative to an older home like mine. I’d like to know the weight and cost of these systems. Perhaps when I have the time, I can research further.
Since you live in Pennsylvania, tell us how you have applied this information.