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Floor Construction

  • 20-06-2013 11:31pm
    #1
    Blue bull
    Registered Users, Registered Users 2 Posts: 41 ✭


    Hi all. New user. I'm converting an old stable that adjoins my house. I have taken up the old floor (cobblestones and rubble). I want to pour a new floor but am not sure of the lay out of the the different layers of hardcore before I pour the concrete. Is it 804, dpc, insulation board or a different lay out. Any advice is greatly appreciated.


Comments

  • #2
    Poor Uncle Tom
    Registered Users, Registered Users 2 Posts: 14,547 ✭✭✭✭Poor Uncle Tom


    Generally the make up is hardcore, blinding, radon barrier/DPM, insulation, (insulation protection layer if necessary), concrete with reinforcement if necessary.

    The thickness of each of those layers is going to be dependent on the uses and should be decided by Arch/Arch Tech/Engineer/Etc in conjunction with BER Assessor.

    Perimeter insulation, thermal bridging, rising damp, DPC's, heating, all need to be taken account of as well.


  • #3
    Blue bull
    Registered Users, Registered Users 2 Posts: 41 ✭Blue bull


    Hi "poor uncle Tom"
    Thanks for your reply today. The floor is only about 18ft x 12ft. I'm not getting a engineer or anything like that to oversee things. I will do the floor/foundations myself and then get the necessary trades after that. The will be a timber frame on top of the floor and that about it, no heavy weights on it. I just needed to know the different layers to do the foundations with. Many thanks for your reply today.


  • #4
    muffler
    Registered Users, Registered Users 2 Posts: 46,545 ✭✭✭✭muffler


    Blue bull wrote: »
    Hi "poor uncle Tom"
    Thanks for your reply today. The floor is only about 18ft x 12ft. I'm not getting a engineer or anything like that to oversee things. I will do the floor/foundations myself and then get the necessary trades after that. The will be a timber frame on top of the floor and that about it, no heavy weights on it. I just needed to know the different layers to do the foundations with. Many thanks for your reply today.
    We dont allow discussion on structural issue as per section 1.5 of the forum charter

    You need to engage an appropriate professional.


  • #5
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Blue bull wrote: »
    Hi all. New user. I'm converting an old stable that adjoins my house. I have taken up the old floor (cobblestones and rubble). I want to pour a new floor but am not sure of the lay out of the the different layers of hardcore before I pour the concrete. Is it 804, dpc, insulation board or a different lay out. Any advice is greatly appreciated.
    what are you converting this for - ie what is its use?

    if it is as part of your habitable dwelling then do as advised above by PUT & Muffler


  • #6
    Blue bull
    Registered Users, Registered Users 2 Posts: 41 ✭Blue bull


    Hi Bryan f

    Thanks for your reply today. A friend who is a Qs is helping with the build. The Walls are sound in the shed. There was a new roof and slates put on about 6 years ago. So it's only the foundations that I need a hand with. It will be an everyday use room.


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  • #7
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Blue bull wrote: »
    Hi Bryan f

    Thanks for your reply today. A friend who is a Qs is helping with the build. The Walls are sound in the shed. There was a new roof and slates put on about 6 years ago. So it's only the foundations that I need a hand with. It will be an everyday use room.

    great stuff, you have a friend who is a QS, so you have someone to PRICE the job for you;)

    the rubble stone Floor: engineer to spec concrete floor and consider the 'sound' walls, prior to the floor getting dug out ;), radon sump/ vent & radon barrier, 100mm PIR kingspan minimum + 50mm perimeter insulation, (you'll be wanting more insulation with UFH), any rad pipes should be very well insulated.

    presuming rubble stone walls: your looking at a breathable wall system with suitable external render & internal liner (think gore-tex system) with careful consideration of due point (ie make sure the insulation in correct location relative to the existing cold surfaces) you may wish to consider an external French drain in lieu of an electro dpc system or similar depending on conditions

    you'll want to carefully consider your ventilation strategy especially with this type of existing construction

    and the roof.. how do you propose to vent it? I presume the felt is not breathable? you may wish change a reasonable % of the slates to vent-slates before installing a breathable insulation & Vapour barrier on the warm side.

    best of luck with your conversion:)


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