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Anyone living in a house with Ewi? Opinions please...

  • 20-11-2016 2:46pm
    #1
    agrostar
    Registered Users, Registered Users 2 Posts: 162 ✭✭


    Hello there, we are currently at planning permission stage with our new build so hope to be starting in the first quarter of the new year weather permitting. I am very much drawn to the idea of external insulation as the build method. It's seems like a very good design for eliminating cold bridge issues and having good thermal mass and high levels of insulation etc.
    I'm just wondering what people's experience of living in a house with Ewi, heating comfort etc. We would most likely be using 200mm rc concrete walls with 200mm of eps on exterior.
    Any opinions greatly appreciated.


Comments

  • #2
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,880 ✭✭✭MicktheMan


    We retrofitted 200mm rockwoll to our 1970's house and the difference in comfort is immense. Our house more or less sits at 20 degC with very little heat input (we lost power in a storm last december one evening and the house overheated using candles for lighting!). The windows were upgraded to tg at the same time and moved out flush with the outer leaf such that the ewi could overlap the frames.

    Imo, the benefits that high thermal mass in conjunction with a good thermal envelope has in regulating a comfortable indoor temperature are significant but are not appreciated by many.

    Don't forget air tightness and ventilation (just as, if not more, important as insulation).


  • #3
    agrostar
    Registered Users, Registered Users 2 Posts: 162 ✭✭agrostar


    MicktheMan wrote: »
    We retrofitted 200mm rockwoll to our 1970's house and the difference in comfort is immense. Our house more or less sits at 20 degC with very little heat input (we lost power in a storm last december one evening and the house overheated using candles for lighting!). The windows were upgraded to tg at the same time and moved out flush with the outer leaf such that the ewi could overlap the frames.

    Imo, the benefits that high thermal mass in conjunction with a good thermal envelope has in regulating a comfortable indoor temperature are significant but are not appreciated by many.

    Don't forget air tightness and ventilation (just as, if not more, important as insulation).
    Thanks mick to me Ewi seems like a no brainer maybe that's why I'm afraid:D it's a method that has been around for years yet very little seems to be known about it if you know what I mean. I'm not gone on using cavity wall and insulated plaster slab I reckon in time there will be serious mould issues. I really like the idea of Ewi but am just concerned about how it's suited to use in Ireland


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