If you are getting a roof replacement through an insurance claim, you're going to be receiving an estimate from the insurance company. Now, a term that is typically used during a roof replacement is R&R and DNR. DNR means detach and reset. That means that you'll be receiving the same, material that was previously on there. Typically, this applies to vents on a roof because there isn't enough significant damage to warrant a replacement. If there is a replacement, you're going to see something called R&R. That means remove and replace. Therefore, the contractor is going to take that off and replace it with a brand new, item.