Hi Everyone - we are experiencing heavy rain this morning and when I woke up this morning, I noticed a slow drip coming from my Excel Flue extension along the seam, (connector from the inside ceiling to stove pipe) causing the drip to land on top of my stove. Is this water coming in from around the roof flashing? Also - will the flue extension need to be replaced as I thought there was insulation inside these. Thanks in advance.