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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Housing - Renovation: Insulating around a chimney

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  1.  
    • CommentAuthorviki83viki
    • CommentTimeJan 20th 2019
     
    Hi all. First post alert.

    We're renovating a 1930s semi, and have totally gutted the loft room in an attempt to upgrade the insulation. (Turned out the dormers were rotten too, but that's a other story.)
    Our plan is to use Actor Hybris between the timbers and Hcontrol over the timbers before counter battening and then boarding.
    However, I've read that actis shouldn't be used to insulate a chimney, and we have a party wall with a stud that sits about a foot out. In the void between the party block wall and this stud is where the chimney stacks run. I hope I'm explaining that ok.

    What insulation is best to fill this void with please? We plan on boarding with sound board to minimise sound transfer also.

    Thank you.
    • CommentAuthortony
    • CommentTimeJan 21st 2019
     
    Vermiculite or rockwool batts
  3.  
    Posted By: tonyVermiculite or rockwool batts

    +1
    Except that vermiculite usually comes in granules so can be poured in but needs containing whereas rockwool bats are self supporting - so use what ever is easiest in your situation.
    • CommentAuthorviki83viki
    • CommentTimeJan 21st 2019
     
    Ok, thank you! Much appreciated. Does Rockwool provide acoustic insulation of much worth do you happen to know? We don't hear much noise really, but since the room is gutted we may as well future proof it in case end up having noisy neighbours down the line.
    • CommentAuthorowlman
    • CommentTimeJan 21st 2019
     
    • CommentAuthorCWatters
    • CommentTimeJan 24th 2019
     
    +1 Rockwool batts. Will help with sound insulation. Might consider two layers of plasterboard for increased sound reduction.

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