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Best way to insulate existing concrete floor

  • 18-05-2011 2:25pm
    #1
    Wavey
    Registered Users Posts: 861 ✭✭✭


    Afternoon all,

    The car port at the side of my house was blocked up and converted into a hallway / utility room.
    It was done using only 9" cavity blockes and no insulation.
    I plan to use 80mm warmboard to insulate the walls and ceiling.

    What is the best way to insulate the concrete floor?

    I have to assume there was no DPM used here.

    Any advice appreaciated,

    Wavey.


Comments

  • #2
    heinbloed
    Registered Users, Registered Users 2 Posts: 1,632 ✭✭✭heinbloed


    Get a civil engineer to check the situation. There is more than the thermal cunductivity of the shell to be looked after.


  • #3
    Valdes
    Registered Users Posts: 16 ✭Valdes


    If you think there is no dpm then you could do the following but it would raise the floor level by c. 100mm

    Lay a sheet of thick guage builders plastic over all the floor and run it up the walls 250mm behind the warmboard. Then lay a 4x2@ framework over the floor (on edge) - similar to a stud wall type 14" centres and noggins to be extra safe. Then fill the gaps with insulation (use rigid insulation)

    Finally you will then need to place a floor over this. Either use standard floorboard or else plywood if you intend to use a laminate floor in there.


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