Nice group of birds!
Cold enough to need to heat the waterer?
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and then it's always there!
That maybe they will have a hard time getting up and down due to space restrictions.
Guessing that roosts are about 24" high, they'll probably need wing spread to navigate.
Might be fine, might not.
Butbutbut.... you need light and especially ventilation.
Oh maybe your soffits are open, high and low?
It sure is pretty!
Chick or chickens coming on xmas?