First we need to know what type of roofing material is on your roof and where on the roof this spot is located. This will help me, help you?
A 2"x10" - 16 inches on center is sufficient. I'm more interested on how you are going to place this deck above this roof.
thanks big time! I was concerned that I may have to pull that 12/2 line out and replace it with the 14/2.
I am in the process of wiring my new addition. Is it o.k to run 12/2 wire from my electical panel to the addition (the distance is approx. 75 feet...