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Help with quantities

  • 10-02-2010 6:11pm
    #1
    Bitten & Hisses
    Registered Users, Registered Users 2 Posts: 1,202 ✭✭✭


    Hi folks, just wondering if you could help me on a query I have. For standard block on edge construction, is there a standard quantity of sand and cement used per thousand blocks? I'm referring only to blocklaying here, not plastering or anything else. Thanks in advance for any help.


Comments

  • #2
    aujopimur
    Registered Users, Registered Users 2 Posts: 3,953 ✭✭✭aujopimur


    Average house will require 1 load of sand (20 tn.) &2 pallets of cement for blockwork.


  • #3
    Poor Uncle Tom
    Registered Users, Registered Users 2 Posts: 14,547 ✭✭✭✭Poor Uncle Tom


    aujopimur wrote: »
    Average house will require 1 load of sand (20 tn.) &2 pallets of cement for blockwork.
    What are you considering an average house?


  • #4
    soldsold
    Registered Users, Registered Users 2 Posts: 555 ✭✭✭soldsold


    That sounds about right, my extension is 2500 sq ft and used a bit over 20t of sand and 2 pallets of cement. Cement by the pallet (80 bags) was 330 euro inc vat.


  • #5
    Bitten & Hisses
    Registered Users, Registered Users 2 Posts: 1,202 ✭✭✭Bitten & Hisses


    soldsold wrote: »
    That sounds about right, my extension is 2500 sq ft and used a bit over 20t of sand and 2 pallets of cement. Cement by the pallet (80 bags) was 330 euro inc vat.

    Ok, this is going in the right direction. How many blocks did you lay for this amound of sand and cement?


  • #6
    soldsold
    Registered Users, Registered Users 2 Posts: 555 ✭✭✭soldsold


    At a guess about 9000 to 10000 4 inch blocks I think, not sure of the exact amount


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  • #7
    soldsold
    Registered Users, Registered Users 2 Posts: 555 ✭✭✭soldsold


    Total cavity wall cost in my case was:

    Inner leaf block on flat 20 blocks per m2:
    5 euro per m2 to buy the blocks (20blocks x50 cent per block)
    1 euro per m2 for cement/ sand/ dpc/ plasticiser (approx)
    14 euro per m2 to lay the blocks = 20 blocks x70cent per block
    Inner wall total = 20 euro per m2

    Pumping the cavity = 15.62 per m2

    Outer leaf block on flat per m2:

    2.50 euro per m2 to buy the blocks (20blocks per m2 x 50 cent per block)
    50 cent per m2 for cement/ sand/ dpc/ plasticiser (approx based on 2 pallets of cement at 330 euro each for my job)
    7 euro per m2 to lay the blocks = 20 blocks x70cent per block
    Outer block wall total = 10 per m2

    Cavity wall total = 20+15.62+10 = 45.62 euro per m2

    Add plastering cost of around 18 euro per m2 (guess)
    Add painting cost of around 8 euro per m2 (wild guess)
    Add extra lintels over window and door openings in outer block wall - 2 euro per m2 (based on my job)
    Add wall ties - 60 cent each + vat x 4.9 per m2 = 3.55 per m2

    Total 225mm Cavity wall cost is around 77 euro per m2

    This assumes worst case scenario where every inner leaf is on the flat, but 150mm blocks on the edge are often specified or a mix of 100mm blocks on the flat and 100mm blocks on the edge.

    Steve


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