Pry, chisel and scrape off old metal flashings and roofing cement. Before you do anything, get your ladder, roof brackets and safety harness set up so you can work safely and efficiently on the roof.

Q. I read you column every week, but have not come across this problem. We live in a condo that is about 22 years old. We have a lot of cold air coming into our living room through our fireplace even ...