@eldokid- I have been to this place and I have seen first hand the damages done here. I went in the summer of 2011. The reason hwy the paint is peeling in only some place is because of the window damages in each room. Not all the glass from each window is broken out. Also, where the sunlight hits and the roofing damage is a big part of where the paint peels. The whole hospital is completely run down and beware if you decide to go. I went with a group of friends really late at night. There IS security and if caught can get fined and/or jail time. It has many bats and water damage from the roofs being negleted for such a long time. It's sad to see such a beautiful piece of archetecture go to waste and be forgotten except for rumors of being haunted. Btw- when I did visit there I went with the intention of being opened minded and maybe hearing something all I did hear was the wind through the broken down rooms. Creepy not haunted. Though I have seen pictures of times I was unable to accompany my friends that say otherwise. I'll leave that one up to you should you decide to visit Henryton for yourself. It's worth the trip that's for sure.
The slates on the roof are a local material quarried from Pennsylvania known as Pennsylvania ribbon slate. Notice the stripes diagonal pattern, most regions slates will have a nuance like that to identify the region it originated from. Its not often you even find an individual that truly knows how to naturally slate a roof any longer.
I just went this past Saturday (the 15th). The place is awful shape, worse than ever. There are still a few decent shots to be had but almost nothing is left from even when Motts took these shots. It's a shame, really.