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Sealing a draught

  • 13-12-2011 10:02pm
    #1
    bbam
    Closed Accounts Posts: 7,410 ✭✭✭


    Was asked to look at a problem in a relatively new house..
    In the upstairs rooms the outer walls are slabbed with insulated boards, there is a draught coming down the back of the boards and out under the skirting board.. Particularly on windy days like today.. It can easily be felt on your hand down at floor level and it definitely cools the rooms..

    Would it be effective to seal along the bottom with a silicone type sealant, maybe something odourless.


Comments

  • #2
    whizbang
    Registered Users, Registered Users 2 Posts: 1,974 ✭✭✭whizbang


    have a look here:

    [HTML]http://www.kingspaninsulation.co.uk/getattachment/633e1bad-b13e-43ef-a4a4-4b1789667cd6/Kooltherm-K17-Insulated-Plasterboard.aspx?disposition=attachment[/HTML]

    you cant use silicone. There are specialised adhesives/fillers available exactly for this stuff, but i dont know any names. just try to keep it off the floor because movement in the floor may loosen it.


  • #3
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    bbam wrote: »
    Was asked to look at a problem in a relatively new house..
    In the upstairs rooms the outer walls are slabbed with insulated boards, there is a draught coming down the back of the boards and out under the skirting board.. Particularly on windy days like today.. It can easily be felt on your hand down at floor level and it definitely cools the rooms..

    Would it be effective to seal along the bottom with a silicone type sealant, maybe something odourless.

    its only a remedial solution, if its a newish house it may fall under this and the builder may be persuaded to rectify the lack of air-tightness...


  • #4
    red sean
    Registered Users, Registered Users 2 Posts: 2,917 ✭✭✭red sean


    its only a remedial solution, if its a newish house it may fall under this and the builder may be persuaded to rectify the lack of air-tightness...

    Very reassuring BryanF !!:D:D


  • #5
    Carlow52
    Closed Accounts Posts: 2,389 ✭✭✭Carlow52


    looks to me like the old wall vent not ducted problem so the source of the wind needs to addressed: plenty on this forum about this problem

    eg http://www.boards.ie/vbulletin/showthread.php?p=75740054


  • #6
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    red sean wrote: »
    Very reassuring BryanF !!:D:D
    i'm not really sure what your getting at here? I was trying to be diplomatic in my response. if it had of been done correctly in the first place, there would be no mention of silicone sealant, trying to stick to plasterboard, skirting and flooring. Depending on the construction build-up, the suggested 'remedial solution' is imo half-assed! is that more reassuring for you?


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  • #7
    red sean
    Registered Users, Registered Users 2 Posts: 2,917 ✭✭✭red sean


    Apologies. Just a joke on the choice of words as highlighted.


  • #8
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    red sean wrote: »
    Apologies. Just a joke on the choice of words as highlighted.
    no worries:) too much caffeine:(


  • #9
    bbam
    Closed Accounts Posts: 7,410 ✭✭✭bbam


    OK..
    There are no wall vents, ventilation is through trickle vents in the windows..
    I was planning on sealing between the bottom of the skirting and the floor boards..
    Taking off the skirting isn't an option..
    I can't get to the top of the boards as it's a story and half...
    Builder isn't round any more either so there's no one to follow..

    I suppose my question is will there be any problem with sealing this with silicone?? I can't think of any potential problems myself and am planning to do it at the weekend...


  • #10
    bbam
    Closed Accounts Posts: 7,410 ✭✭✭bbam


    I had a better look and it seems to be concentrated under two windows. Would poor detailing be letting in a draught but not moisture? No signs of damp at all.


  • #11
    paddy147
    Banned (with Prison Access) Posts: 15,858 ✭✭✭✭paddy147


    Ah the joys of Bio-Foam Open Cell 800.:)


    Snug as a bug in a rug.:D


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  • #12
    bbam
    Closed Accounts Posts: 7,410 ✭✭✭bbam


    paddy147 wrote: »
    Ah the joys of Bio-Foam Open Cell 800.:)
    Snug as a bug in a rug.:D

    Is that the tin of sealant foam applied to the bottom of the insulated plasterboard or a foam fill behind them..?

    I sealed under the skirting this morning and it was a good job.. draught stopped instantly :)


  • #13
    paddy147
    Banned (with Prison Access) Posts: 15,858 ✭✭✭✭paddy147


    bbam wrote: »
    Is that the tin of sealant foam applied to the bottom of the insulated plasterboard or a foam fill behind them..?

    I sealed under the skirting this morning and it was a good job.. draught stopped instantly :)

    Yes,Its spray foam.:)

    It expands to over 100 times its spray on volume in 5 seconds and is completely cured in about 30 seconds.

    DSCF8151.jpg
    DSCF8173.jpg


  • #14
    moy83
    Closed Accounts Posts: 4,701 ✭✭✭moy83


    Paddy147 can you buy that open cell stuff in diy packs ? Are the cans in hardware open cell ?


  • #15
    paddy147
    Banned (with Prison Access) Posts: 15,858 ✭✭✭✭paddy147


    moy83 wrote: »
    Paddy147 can you buy that open cell stuff in diy packs ? Are the cans in hardware open cell ?

    No,not that Im aware of.

    I had 2 large attic spaces to get spray foamed,aswell as a large 1st floor area,so I needed a professional company to come in and spray foam the house for me.

    Well worth the money,masive reduction in noise and also superb heat retention.:)


  • #16
    moy83
    Closed Accounts Posts: 4,701 ✭✭✭moy83


    paddy147 wrote: »
    No,not that Im aware of.

    I had 2 large attic spaces to get spray foamed,aswell as a large 1st floor area,so I needed a professional company to come in and spray foam the house for me.

    Well worth the money,masive reduction in noise and also superb heat retention.:)
    Its great tac alright i got the fathers house done two years ago from the ground right up to the ridge , its the best insulation i've ever seen . It would be handy if you could buy five gallons or so for smaller places where it wouldnt be worth bringing in someone specially .


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