Fixing up an old coop
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I think you would be better served to tear that down, and recycle as much of the lumber and siding as you can.
I see lots of structural issues with that thing.
eta: lots of floor framing rot too. start from scratch, and be worry free.
Edited by Tumbling K - 5/27/16 at 10:25am
where about are you located?
the structure is in the process of falling down right now. just because it hasn't failed in an epic fashion.
note the roof line. note the beams in the floor framing that are broken. note the one pic you show, of the rotten floor, see the dirt? I think the frame of the floor has fallen and is sitting on the ground.
if you have chicks now and are getting some pullets soon, you could take a few weekends, to pull off a few good boards to use and get you a functioning coop. if you have bad predators, or large ones, you are gonna be in a pickle. I'm not sure you could plug every hole in that structure to keep out weasels.
heck, maybe not even raccoons.