Sabrina, he was a sweet old man who built it first as a camp and eventually finished it. He did some really odd things like my basement has junction boxes every few feet. The partical board thing is way weird because when we moved here 20 years ago there was one finished room upstairs, the rest was attic. The attic was all plywood but he had put partical board over it in the finished room. It had carpet at the time. Anyways, now that all of the rooms are done, that one is 1/2 in higher. I hope I am not boring anyone.