We recently moved into a new (to us) home and my wife has a list of projects she would like me to do to make the home "ours". One of them being to extend the corner gas fireplace up to the ceiling. As I was taking measurements I noticed there is a large 1/2 inch gap where the fireplace has pulled off of the wall. We had repainted the walls in late fall and the gap was maybe 1/16 inch or so. Both wall are exterior walls so I was wondering if this is likely due to the cold winter and if it will shrink back as it warms up? I am hesitant to add the extension in case there is another issue causing the fireplace to pull off the wall.