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First Floor Finish

  • 17-02-2011 6:53pm
    #1
    soloeffort79
    Registered Users, Registered Users 2 Posts: 46 ✭


    Hi, currently blocked up to first floor with hollowcore on. Looking for some advise/opinions on what is next best thing to do:

    1. Pour finish floor on hollowcore and then build blocks on top of this, or

    2: Build blocks on top of hollowcore and add finished floor screed later?


Comments

  • #2
    muffler
    Registered Users, Registered Users 2 Posts: 46,550 ✭✭✭✭muffler


    Moved to C & P forum.


  • #3
    Gulliver
    Registered Users, Registered Users 2 Posts: 1,026 ✭✭✭Gulliver


    You'd have to shutter around the edges of your hollowcore if you poured the floor first. I think build straight on the hollowcore is the best option, BUT I'm not an engineer.


  • #4
    mickdw
    Registered Users, Registered Users 2 Posts: 23,688 ✭✭✭✭mickdw


    You/your Engineer need to confirm via the hollowcore designers whether there is actually a structural screed required in your particular case.
    If a structural screed is a requirement, then you would need that screed to run continuously under the walls (at least under walls build across the span of any given slab.
    If your spans are such that a structural screed is not a requirement, then you can do what you wish and in this case, the best option would be to screed after walls built.
    Many domestic slabs are specified so as not to require a structural screed. This frees up many more options as you can then lay insulation (for underfloor leating etc) between slab and screed. - If the screed was to be structural, it would need to be attached to the precast slab to do its job.


  • #5
    FesterBeatty
    Banned (with Prison Access) Posts: 406 ✭✭FesterBeatty


    Given the nature of your query I assume you commenced works without a structural engineer...?


  • #6
    Gulliver
    Registered Users, Registered Users 2 Posts: 1,026 ✭✭✭Gulliver


    mickdw wrote: »
    You/your Engineer need to confirm via the hollowcore designers whether there is actually a structural screed required in your particular case.
    If a structural screed is a requirement, then you would need that screed to run continuously under the walls (at least under walls build across the span of any given slab.
    If your spans are such that a structural screed is not a requirement, then you can do what you wish and in this case, the best option would be to screed after walls built.
    Many domestic slabs are specified so as not to require a structural screed. This frees up many more options as you can then lay insulation (for underfloor leating etc) between slab and screed. - If the screed was to be structural, it would need to be attached to the precast slab to do its job.

    OP, this is why I said it was my opinion. I didn't know this and am glad someone pointed it out (thanks mickdw).

    As the mantra of the Construction and Planning forum goes "If in doubt, consult an engineer"


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  • #7
    bruschi
    Moderators, Sports Moderators Posts: 4,145 Mod ✭✭✭✭bruschi


    personally, I'd go screed first and then blocks. much easier to pour a screed if there is no walls in the way. just means shuttering the edge, but that isnt a big problem anyway. it also means you have a good level surface to build off. as good an all as hollowcore slabs are, they are subject to bending in the centre etc, and wouldnt be as level as a finished screed.


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