I'm planning on adding a plywood floor to part of my attic. I have some old carpet that I'm thinking about laying on top of the plywood. Is this a bad idea?
It's not too unusual. The carpet will collect some dust and possibly insulation, and might have problems if it ever gets wet from a roof leak. On the plus side, the carpet will act as a little insulation and is quieter and cooler in the summer to walk on.