You can't put your hand in it, it's not a significant problem. If you replaced the steel below and the wall below has dropped a little onto the steel then this is pretty normal. Is it following the roof line outside or does the crack go through the bricks?
You can't put your hand in it, it's not a significant problem. If you replaced the steel below and the wall below has dropped a little onto the steel then this is pretty normal. Is it following the roof line outside or does the crack go through the bricks?