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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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Products: sheeps wool

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  1.  
    • CommentAuthormook
    • CommentTimeMar 26th 2007
     
    my apologies if this has been done already... perhaps i can be pointed in the right direction (confusion between forums)

    i am *considering* sheeps wool insulation for a coffee shop refurb. i'm less interested in its thermal properties but more interested in acoustic performance. i need 100mm batts for a false ceiling between floors (35 sqm) and partition walls (10sq m).
    has anyone got any experience of its effectiveness in this kind of application?
    ... also would its moisture retention properties help improve the climate in the building?

    at a good deal more than twice the price of say acoustic rockwool i'm struggling to justify the expense.

    are there any other environmentally friendly alternatives i may not have considered?
  2.  
    Hi mook,

    Density is closely linked to accoustic performance [for airbourne sound] that is why mineral wool, particularly the 'high' density accoustic slab is better than less dense insulations. High density accoustic plasterboards are an alternative as the best way to insulate against airbourne sound is by using mass, not insulation. Are you considering fire resistance as well?

    I see no advantage in retaining moisture in insulation of any kind, in fact you should have a vapour barrier stopping moisture from getting in to the insulation from your coffee shop.
    • CommentAuthorbiffvernon
    • CommentTimeMar 26th 2007
     
    One of the claimed advantages of Thermafleece is how it handles moisture.
    •  
      CommentAuthornigel
    • CommentTimeMar 26th 2007
     
    Thermafleece has a density of 25kg/m3 whereas something like Rockwool RW45 has a density of you guessed 45Kg/m3.

    The latter is far more suitable as an acoustic barrier. You don't say if you are concerned about airborne sound or impact sound as the solutions are very different.

    My guess is its airborne in which case 100mm will be fine make sure there is an air gap as well.
    Also make sure that its fitted tightly and there are absolutely no air gaps for sound to travel around as this will undermine any benefit of the insulation.

    As an alternative warmcell can be used an acoustic insulant and there are other cellulose based products such as homotherm which have a high density.
  5.  
    Hi Biff, are you suggesting that thermafleece performs better when moist?
    • CommentAuthorbiffvernon
    • CommentTimeMar 26th 2007 edited
     
    Mike, I'm just suggesting you read the Moisture Control leaflet, available from http://www.secondnatureuk.com/info.htm
    • CommentAuthorMike George
    • CommentTimeMar 26th 2007 edited
     
    Sorry Biff, that was a hasty remark [now removed] I have now read the leaflet - heat of sorption eh, very interesting.
    I also came across this, but have not read it yet , I can get it free in work!
    http://trj.sagepub.com/cgi/content/abstract/59/6/324
  8.  
    What goes on with the links? They have all stopped working
    •  
      CommentAuthornigel
    • CommentTimeMar 27th 2007
     
    Mike

    You seem to have an extra href in your link.
    • CommentAuthorGuest
    • CommentTimeMar 28th 2007
     
    Thanks Nigel, It is sorted it now.
  11.  
    Would help if I signed in

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