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Deep Retrofit

  • 10-06-2023 10:17am
    #1
    jiminho
    Registered Users, Registered Users 2 Posts: 414 ✭✭


    Hi folks

    Looking for some advice. Proceeding with a deep reno in a house which requires a lot of work and trying to keep to a budget. We're needing to make compromises as expected due to the price of some quotes we are getting back. Originally thought the way to go was external insulation, heat pump and DCV but the prices for external insulation in particular were extremely high. We're now set on cavity fill (with the intent to do EWI later down the road), attic insulation, triple glaze glass/doors, block up open fireplace with log burning inset fireplace, new condensing gas boiler w/rads and as much air infiltration mitigation measures as possible.

    The last two things we're looking at is the existing suspended timber floor and ventilation. Haven't got quotes in yet but we're already looking tight. Ideally would want to remove the floor joist and install a concrete floor w/ UFH and assuming then the house is relatively air tight (as I assume the existing floor is a huge contributor to external air infiltration), go with a DCV system. Alternatively though, we could install insulation between the joists and use an air tight membrane overtop or just install an air tight membrane on top of the subfloor w/ no insulation. We could also move from DCV to passive ventilation.

    Don't have an architect involved so just looking for online advice but where do you think I'll get the best bang for the buck etc.?



Comments

  • #2
    padjocollins
    Registered Users, Registered Users 2 Posts: 463 ✭✭padjocollins


    am not in the trade but am interested in retrofits and peoples experiences. For newbies DCV = direct control ventilation , basically a ventilation system but takes in fresh air but exples statle air but keeps the heat in the house ( i suppose a bit like a reverse heat pump) . EWI , external wall insulation . UFH, underfloor heating . good luck and hope u get a lot of helpful answers.



  • #3
    Biker1
    Registered Users, Registered Users 2 Posts: 400 ✭✭Biker1


    https://www.boards.ie/discussion/comment/120698175#Comment_120698175

    DCV is Demand Controlled Ventilation and does not contain any heat recovery capabilities. It's purely fresh air in and stale air out when required.



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