Chimney Insulation?

[MrD]

Sorry if this is a dumbass question, I've had a good search of the existing posts and not found the answer.

I'm in the process of having a gas stove installed into the fireplace, directly underneath the flue.

A flue liner will be fitted and a closure plate to prevent, as I had it explained to me, debris from falling into the room. Also a measure of insulation I guess.

My question is - would it be possible or advisable to insulate the free space surrounding the flue liner, above the closure plate?

I would like to do this to improve sound insulation between myself and the neighbours. I'd like to have the new AV system at full cinema levels without offending the old boy next door. I'm addressing this issue in other ways, I just don't want to have my other efforts cancelled out by the newly exposed fireplace cavity.

Thanks,
Mark.

 

[JohnD]

I think it might be the fireplace that would benefit from insulation more than the chimney. Often in semi-detached or terraced houses, the fireplace in one house is back-to-back with the fireplace in the next, and the wall is sometimes only half-a-brick thick (four and a half inches) and often the mortar is cracked from heat. not so much of a problem when the fireback is in, but if you open up or remove the chimeybreast sound can travel very well (in my first terraced house, the neighbour asked how my cough was as he could hear me in the adjacent bedroom )

 

[Nige F]

Good reason not to "ahem" be too vocal in bed