They should be okay. One thing...if the hardware cloth is on the inside of the window, it would be very easy for a predator to push it in and gain entrance. Much better to mount it on the outside of the window and put boards over the edges of it so it isn't easily pulled off. For the rest, there isn't much you can do. Do you and your birds a favor though, get them used to noise. My birds are around compressors, nail guns, saws etc., a lot and they never bat an eye. This is a good thing. I understand that this was a freak thing and shouldn't have happened, but this should show you that it could happen again and you may not be there then either, for damage control. Just a thought.
I missed this one last night Haunted55, WE have been building there, just not banging on their coop, with them in it...they are a hatcher lot and seem more "flighty" than the heritage birds. PLUS the only safe place they have right now it their coop. The roof was screwed on with them in it, they have heard the skill saw right outside, but pounding on their coop, for now, is a NO GO....I talk to them as I walk towards their coop, so they know it's me, but whatever happened, and I suspect they got out and got chased around trying to catch them...but have no proof, but with the lock off the door, and he had walked off to another project, his truck, by the time I got back, I highly suspect it was more than just pounding on their coop. That brick would not hold the door well, did not hold the door well, and when the lock is off, which apparently he took off to attach the tar paper to that side of the wall, the door swings open freely. Anyways, I have attempted to talk with him this morning, not sure he listened, but he was told to NOT GO NEAR the coop, the chicks, or whatever,unless I am here. OH and the lawn is mowed right by the coop, so they are used to some noise but not directly on their one safe place.
I have the hardware cloth not just attached with fence staples but have wood screwed over the ends. I had planned on the way you said, but the stupid manager put the window on the outside of the trim even????? Not what I had told him I wanted to begin with at all....like I said, he does not listen well, especially to a female, and thinks he knows better...when he has never raised chickens, I have, built a coop, I have, many...so I intend to talk with him further, because he walked off on me just now...sigh....I am also going to talk with the landlord, when ever he gets up??? and see what HE can do to help with this also, since this is a lot of his money going into this project and we have atleast two more buildings and more runs to put up for the heritage birds next spring. I'm going back to the heritage birds....
Oh another thing, there IS lots of noise here, there is an INN that is rented here with kids hollering, a shooting range not far from us, as the crow flies, and a cop right down the road that shoots on his property for practice, and there were tons of fireworks this year too. Lots of building projects, and fixes for the four rental cabins, one of which I rent also. As I don't know what went on, though highly suspect they got out somehow, as well as their coop being directly pounded on...that I DO know, as there is tar paper all over most of it...it is not always totally quiet, so they have been exposed to different loud noises. I still wouldn't want him pounding on their coop with them in it....in the run, that's ok...they can see what is going on...and I will be there too...as long as they see me, hear me, as I am Momma, apparently, they are fine with most noises also...I honestly think something more went on but again, I don't know....also, my cabin is not but 25 or so feet from their coop, so as little chicks, they did hear all that building noise also as it was hot and I keep my windows open in the summer even at night. I just don't know what happened that stressed them out so bad??????
Anyways...thanks for all the suggestions, some of the things are already done and can't be fixed unfortunately or I would definitely take your suggestions and if I could redo the windows, but that is not possible now, or have him that is...I am not allowed to use the power tools because I am a girl and might hurt myself...????? Have used power tools most of my life, this guy is just a jerk...the landlord is a really nice guy though and we get along fine...it's just the mananger I have issues with....thanks sooo much for ALL your help.