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Old Bungalow Floor Insulation

  • 17-04-2018 8:42am
    #1
    keano25
    Registered Users, Registered Users 2 Posts: 1,844 ✭✭✭


    What would you recommend to put in the floor at present there is none?

    I will not be fitting underfloor heating just rads.

    Currently trying to decide on between 50mm and 100mm foil back.

    Thanks


Comments

  • #2
    Dudda
    Registered Users, Registered Users 2 Posts: 1,541 ✭✭✭Dudda


    100mm and even 150mm if it will fit. Put in as much as you can as you won't be able easily to add more later.


  • #3
    AstraMonti
    Registered Users, Registered Users 2 Posts: 5,718 ✭✭✭AstraMonti


    Wouldn't the 150mm raise the floor too much?


  • #4
    sydthebeat
    Subscribers Posts: 42,172 ✭✭✭✭sydthebeat


    AstraMonti wrote: »
    Wouldn't the 150mm raise the floor too much?

    impossible to know with the information supplied... hence the
    Put in as much as you can


  • #5
    Calahonda52
    Registered Users, Registered Users 2 Posts: 12,889 ✭✭✭✭Calahonda52


    keano25 wrote: »
    What would you recommend to put in the floor at present there is none?

    I will not be fitting underfloor heating just rads.

    Currently trying to decide on between 50mm and 100mm foil back.

    Thanks
    https://www.nsai.ie/S-R-54-2014-Code-of-Practice.aspx

    standard of workmanship is key as if the airtightness issue is not addressed properly then it really does not matter what thickness you use, it will not do what you expect.
    Retro insulating suspended timber floors is not an easy job to get right

    “I can’t pay my staff or mortgage with instagram likes”.



  • #6
    keano25
    Registered Users, Registered Users 2 Posts: 1,844 ✭✭✭keano25


    Floors have been taken out and gravel underneath.


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  • #7
    Calahonda52
    Registered Users, Registered Users 2 Posts: 12,889 ✭✭✭✭Calahonda52


    keano25 wrote: »
    Floors have been taken out and gravel underneath.
    Compliant of course with
    CoP - Unbound Granular Fill - IS888:2016

    “I can’t pay my staff or mortgage with instagram likes”.



  • #8
    keano25
    Registered Users, Registered Users 2 Posts: 1,844 ✭✭✭keano25


    Calahonda52 wrote: »
    Compliant of course with
    CoP - Unbound Granular Fill - IS888:2016

    Of course.


  • #9
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    I’d argue you need to comply with current regs - around 150mm PIR


  • #10
    keano25
    Registered Users, Registered Users 2 Posts: 1,844 ✭✭✭keano25


    Really, for a self renovation?


  • #11
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    IMO the spirit of the guidance document calls for the limiting of heat loss and, where appropriate, maximising heat gain through the fabric of the building. This should include providing reasonable levels* of fabric insulation in all new construction, including the limitation of thermal bridging.

    *reaaonable levels (when the OP is digging up the floor anyway) should be current new construction insulation levels.


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