Closing up chimney

mccleanp

The house I am building has two chimneys. I am intending to install wood burning stoves in each, with a separate air supply from outside.

However one of the rooms (living room) will not be finished for quite some time, and will be used as a playroom for the next couple of years, since I have young children. Hence one of the stoves will not be installed, and the chimney will be unused. I am thinking of making a bookcase to fit into the opening.

What is the best method to 'close up' the unused chimney? Can I simply use expanding foam, which could be cut-out at a later date? Are there any condensation risks associated with closing up the chimney? Or any damp risks?

Carlow52

Not good to seal it up unless u seal it on top.

Given that you have the external air supply why not let a small trickle of air from it pass up the chimney to keep it aired and have ur bookcase outside this: could line with plaster board

Joey the lips

You can use a baloon it one to protect from draughts. Just let it down for a day or 2 every couple of weeks to stop the air going stale