hello all,
in the 1st floor we have a very drafty fireplace. The room that
contains this fireplace always remains colder than other rooms.
We don't ever use the fireplace.

We've tried to seal the face off with a board and duct tape, but
the cardboard came off.

Will it help to have a glass door installed? Or should we have the
flue replaced? The flue appears closed, but still leaks air.

there is draft all around it including where the fireplaces attaches
to the walls/flooring.

Any suggestions on who to hire and what to do to here?

I've been calling cos that install doors. it appears expensive.

There appear to be no cos that will insulate a fireplace due to
liability.

THANKS