Don't use chicken wire.
DON'T USE CHICKEN WIRE
That's how my very first chicken went out. Raccoon stuck his hand through the chicken wire and ripped her head off. :'(
I put two layers of netting mesh over the original chicken wire and haven't had an issue so far.
Since you said you have a lot of raccoons, I recommend having a padlock to lock your chicken coop up. Little buggers won't be able to get through that. And if they do, you have some pretty big issues.
I don't know what they're called or where to get them, but some people have this motion sensor thing and every time it picks up motion, it lets out a loud noise and/or sprays water.
Windows on a chicken coop can make a coop look cute and fancy, but I wouldn't use them. Little buggers will find a way to open them. Sometimes by smashing the window.
If the coop touches the ground, put stones down around it or better, put in a concrete floor. Something where they won't be able to dig into.
Edited by Scarlit - 12/12/15 at 10:28pm