Yes good advice, have experience in building/engineerining the front of the loft will face east so high adjustable vents, low vents to the west as most rain comes from south easterly winds, one side will face south to cut down on heat from sunny days, other side will get less chill area from the north winds
The roof will be sterling board sheeted and vented with formed steel sheets on top, this allows heat to be kept in loft and air to pass through forms and convect air
The front of the loft will overlap the aviary which will be sheeted with formed plastic, the birds will be allowed constant access to aviary so cutting down on mess in loft. The aviary will have a drained gravel base, would like feedback on top covering suggestions please