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Overlaying concrete

  • 31-12-2009 4:31pm
    #1
    echidna
    Closed Accounts Posts: 19 ✭


    Hi all,
    Perhaps you can help me. Several years ago, I had a shed built for a purpose that it never fulfilled. (dog kennels) The concrete in the shed was laid such a way to promote drainage to 2 central channels for easy cleaning. I have since filled in the channels but now have an oddly sloping floor. The shed is now being used for hay/feed storage, two horses and various other purposes. (quite large) I wanted to re-lay the floor without ripping up the old floor and am wondering how to go about it.
    1. Should I bond the new floor to the old ? If so, how?
    2. Does it require reinforcing for those purposes? What height should I make it?

    Cheers


Comments

  • #2
    mossfort
    Registered Users, Registered Users 2 Posts: 609 ✭✭✭mossfort


    you can just pour a layer of concrete over it and screed it out .


  • #3
    zamur
    Closed Accounts Posts: 17 ✭zamur


    If you want to ensure a good bond, you could scabble the existing floor http://en.wikipedia.org/wiki/Scabbling you can hire a machine to do this. Or if your not too particular and if it is not going to have much traffic, just clean off the existing floor and coat it in a bonding agent - you can use ordinary polybond, mixed as per the instructions on the container, or you could spend more and buy a specific concrete bonding agent made by the likes of sika.

    You should also try and use a 10mm aggregate mix to ensure that sufficient bonding and compaction is achieved.


  • #4
    Poor Uncle Tom
    Registered Users, Registered Users 2 Posts: 14,546 ✭✭✭✭Poor Uncle Tom


    If the shed is being used for general agricultural purposes, then it will need a reinforced concrete slab 125mm - 150mm thick.


  • #5
    echidna
    Closed Accounts Posts: 19 ✭echidna


    Thanks to all who replied - I think that normal bonding will probably suffice - from what you have said and what else I have read. The surface is not paricularly smooth so should provide a reasonable surface for contact of a new layer of concrete. I think I will probably make it about 2" thick. It really won't be used for any agricultural purposes - just storage of horse feed and hay as well as housing the horse in a stable within the shed. I am hardly likely to ever really drive on it - other than perhaps load and unload stuff a couple of times a year from the trailer. Thanks for all your suggestions.


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