Hello.
Getting a fireplace insert installed and wondering about the curing time for the casting around the flue between the insert and the chimney.
I read in the Sverigekassett's installation manual that you can start a fire the next day, but my installer says 2 weeks.
1 day sounds very short, but 2 weeks sounds very long...
Which one is correct? I'd love to start a fire as soon as possible, it's a bit chilly outside now
Thankful for an answer.