Secret bookshelf door's roller will ruin floor-help with support
the cabinet maker who is making the secret bookshelf door in our library said that he needs to put the bookshelf door on a roller to help support its weight. He suggests this roller will mar the wood floor with continued use. Since this door will lead into our computer room it needs to be opened often and we are not sure how to properly support this door's weight without ruining the wood floor its roller goes over. Any ideas? thanks so much!