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External Wall Insulation - anyone have it done?

  • 05-03-2025 08:01PM
    #1
    godzillaess
    Registered Users, Registered Users 2 Posts: 93 ✭✭


    The cost is big.. So trying to research as much as I can before commiting.

    Has anyone here had it done and how effective has it been? Did you go up past soffit or just as far as soffit.. If so any issues?

    Finally, any recommendations for Dublin? PMs welcome. Thanks all!



Comments

  • #2
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,953 ✭✭✭MicktheMan


    Yes, done now over 11 years.

    Cavity fully filled (original was cavity wall), new windows moved out flush with outer wall surface, ewi up past soffit and down past ground level (900mm) to footings. 200mm rockwool batts. Superb job

    HOWEVER

    It would have been as effective as an astray on a motorbike if we hadn't first dealt with the biggest heat loss problem in the house …. the lack of air tightness!



  • #3
    misc2013
    Registered Users, Registered Users 2 Posts: 292 ✭✭misc2013


    Also interested.

    Curious to know how you tackled the lack of air tightness? We have a very draughty house.



  • #4
    Toby22
    Registered Users, Registered Users 2 Posts: 130 ✭✭Toby22


    Hi, I had external wrap done on an 1970 extremely cold house 12 years ago. I didn’t replace the windows, they were only ten years old. The soffits weren’t replaced as builder said they were fine. The difference is remarkable, the house retains the heat.



  • #5
    godzillaess
    Registered Users, Registered Users 2 Posts: 93 ✭✭godzillaess


    https://www.boards.ie/discussion/comment/123236186#Comment_123236186

    So you didn't do any air tightness work? Good to know. My house is about half 1940s and half 2000s (small house with big extension about 25 yrs ago). Old part of the house hard to heat, new part somewhat OK.. Gas bill of 600 just to keep the kitchen/dining area warm (boiler on about 3.5hrs a day).

    Is it realistic to think getting EWI and topping up attic insulation will make a very noticeable difference? When your radiators turn off, does the room retain the heat for a few hours after?

    Any issues with cold bridges/damp patches on the inside walls? So your insulation stops where it meets the soffit (I. E. It doesn't go up beyond it into the attic area?).

    Thanks



  • #6
    TimHorton
    Registered Users, Registered Users 2 Posts: 1,104 ✭✭✭TimHorton


    https://www.boards.ie/discussion/comment/123235277#Comment_123235277

    What did you use below ground level ?



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  • #7
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,953 ✭✭✭MicktheMan


    https://www.boards.ie/discussion/comment/123237211#Comment_123237211

    XPS up to dpc level



  • #8
    MicktheMan
    Registered Users, Registered Users 2 Posts: 2,953 ✭✭✭MicktheMan


    https://www.boards.ie/discussion/comment/123236148#Comment_123236148

    Tested the house first to find / confirm the main issues and then remedied each one depending and what / where the issue was. (it helps though that I am trained and very familiar with air tightness testing, thermal imaging etc).



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