I have a 1 foot square hole in the floor in corner of loft I place drinker on a grill over it as the breeze blows through it keeps all the feathers out of the drinker. with a solid floor you could use plastic drainpipes on the sides or back of loft.
I have paired my hen up in may 1 year when i move house and she still only laid 1 egg in first nest, i put it down to that she lays 2 quick after 6or 7 days.