Have just ordered a proprietary brand aviary, 2.45 long x 1.23 wide by 1.800 high & embarking on the adventure of having a good number of budgerigars, having previously only had one or two in a cage previously.
The aviary is to be sited on our outside, raised, covered deck, this is an area I can see from the kitchen, is next to our pool & where we frequently relax. So it is the best possible position for us to see & enjoy the birds. This is both protected but open to lots of fresh air.
Alternative locations aren't in the equation.
Because the deck is timber boards, 90m.m. wide with 10m.m. gap between them it would seem that the choice of floor within the aviary is limited. Steve (hubby) is thinking rubber mat as this will be reasonably easy to keep clean, is non slip, meets the need to stop seed falling through the deck & hence attracting vermin & (seems to us beginners) practical.
However we are really interested to read what others use in similar circumstances & what you think of the proposed rubber matting.