You can probably convince the contractor to let you make a change. But what ever you do make sure you get a change order in writing exactly as your contract requires, otherwise they will use it against you at a later date when a problem arrises. I once worked on a project where the super would take photos of things like a pile of debris and then later try to say you just left it and try to back charge for clean up. We started taking our own photos with a date stamp after we finished in any area.
