I have a log home, 7 years old, that literally gushes air about mantel height inside. It is a rock propane fireplace. Do I need to seal around the outside of the fireplace. It is also rock outside the house. I’d hate for water to also seep in. What would I use, caulk or chinking? Also the home has all double paned vinyl windows. Some leak water and it pools on the inside window seal. All of them are really hard to open and close. I don’t think they were put in perfectly level. It is such a mes