I've offered to construct a small potting shed for a family friend and am wondering what type of footing I will need. The shed itself is only 10'x8' and will have small prefabbed roof trusses. How far down should I set the posts and does it really need a concrete footing for something this...

I'm building a pole barn home (2 story). Is a 7'"6" ceiling height ok for the first floor? I live in a very rural area so codes are not an issue here however I am worried about wether or not it will be functional.

I am at odds with the way I should add insulation to the roof of my metal pole building. The roof already has the very thin backed insulation that you see in metal buildings. I use my attic and I want to insulate between the joist bays but have heard of moisture problems when adding backed...