We just converted our fireplace back into a wood-burning one. When we discovered there was a matching hearth already under the carpet, it was suggested to us to cut it out and use it. Unfortunately, when the person doing the cutting started, he thought he was cutting around a border. He was actually cutting on the outside of carpet bar. Now we have this large gap around the hearth, and we aren't sure how to fix it. What can be put over the gap?