Hubby has graciously allowed me to turn his old metal shed into the new chicken palace. Friends are helping with the construction/remodeling of said shed. I have some questions though regarding insulating and heat lamps. The walls and ceiling are metal, floor is wood. They will be installing 2 vents in the top of the walls (1 in front, 1 in back) for ventilation. I plan to use that expanding foam where the floor meets the wall for drafts. Should I insulate the walls? If so, how could I attach insulation to the metal walls and then cover it? Also, should I have hubby put in electricity for heat lamps? I do have the electric heaters for the waterers that I connect to an extension cord. We currently have 3 hens (1 is 1 1/2 yr old RIR, 2 10 mo old sex link hens). I am supposed to be getting 2 bantams and 6 sex link hens when the palace is done. Will that be enough chickens that I won't need to worry about heat lamps? Will they provide enough body heat?