You would certainly have less of a mite problem, but it would get hot enough to cook them in the summer
and cold enough to freeze them in the winter I think
Wood has better insulation factors.
You can buy poultry sheild spray to deter them which you coat the inside of the shed with and it's probably worth giving the chickens a bit of a treatment with Diatom Powder (Diatomaceous Earth) which you can also use in the house, sprinkle it EVERYWHERE !
HTH
Karen
I'm in the middle of building a new chicken coop using off-cuts of beech flooring - every groove on the inside will be getting filled with filler and a very think coat of white gloss paint to make it impenetrable for the little bu**ers or at least easier to see them if they do get in (and it should make it a bit more waterproof for pressure washing)
This is the finished effect I'm going for
http://www.flytesofancy.co.uk/chickenhouses/The_Gypsy_Daydream.html minus the fancy steps and door set up on the front and probably only with 2 rear wheels (unless I find any more in the shed
) will post photo's when it's done. I'm WAY too tight to splash out nearly four grand to buy it