


Replacing rotten board behind chimney
In process of replacing chimney, discovered piece of wet wood due to inadequate flashing around old chimney.
How to go about replacing this wood before continuing chimney project? Unsure if it is a rafter or just a piece put on top of that to affix the flashing to. Unsure if can cut out just that section to replace or if need to maybe sister another piece as a repair?
No attic (vaulted ceiling) so any repairs if made from inside would be in approximate area shown. Unless can fix from the outside.
This is not a DIY post. I’m just trying to get info that I can forward to possible contractors to fix.