We are in the planning stages of building our coop and we are curious about how everyone feels about the amount of ventilation required?
For what it is worth, we are located in the SE corner of SC. Hot summers and chilly (no snow) winters.
Here in SC, you really only need to offer protection from the rain, hot sun and occasional cold weather. I know lots of people here around Aiken that dont house their chickens at all.
Do yourself a favor and look to a strong hoop house sort of design.
THE EASY WAY: design in "way plenty" ventilation -- more than enough -- and shut some flaps (or whatever) in cool or rainy weather.
THE HARD AND AGGRAVATING WAY: build limited ventilation, then decide in January that you have insufficient ventilation, and either deal with chickens with respiratory illnesses or (if you catch it in time) drag the ol' Sawzall out to the coop to chop big raggedy holes in it.
Personally, I would recommend the easy way
In a southern climate, it's probably best if much or most of 3 or 4 walls can open up. Flaps/doors can cover 'em when the weather warrants. Make separate long narrow vents up under the eaves that can be left open in most any weather.