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External walls spec

  • 02-01-2013 1:07pm
    #1
    Carraig77
    Registered Users, Registered Users 2 Posts: 37 ✭


    Hi
    I'm new. We are planning to build 2 storey 2500 sq ft house in 2013. We got architect to draw up plans. The wall spec is '100mm concrete block outer leaf with 3 coat sand and cement Knap finished render painted with raised plaster band reveal to all windows and doors.
    110mm xtratherm rigid insulation board, fixed with stainless steel wall ties. 40mm residual cavity/ airspace.
    215mm inner leaf with sand and cement plaster & gyroco skim coat finish. '

    what do ye think?
    Is this sufficient insulation.
    The quantity surveyor came back with a BOE of €290,000 for house and garage 350 sq ft, builders finish, not including esb fees etc.
    We re thinking maybe we need to downsize the size of the house as our budget is 250,000.

    Also reading the posts the most important things seem to be insulation, air tightness so we are hoping to focus on getting them very right and maybe building a smaller house.
    Any advice much appreciated.
    We're building on farm so own the site.
    Than
    Nks
    Kate


Comments

  • #2
    AnarchistKen
    Registered Users, Registered Users 2 Posts: 129 ✭✭AnarchistKen


    From reading your post it sounds like very typical construction methods being proposed.

    My advice is consult with a BER assessor and get some calculations and if possible a model done up to assess what method is best suited. Your architect should have already recommended you do this also.

    From a cost point of view the words "value engineering" are your new best friend in order to pear that 40k off the original estimate. In my opinion the 290k seems very high, I would expect to pay €1,100/m2 including M&E.


  • #3
    Carraig77
    Registered Users, Registered Users 2 Posts: 37 ✭Carraig77


    Thanks very much.
    I think some of the high cost is high spec eg aluclad windows.
    Any recommendations for a BER assessor. Based in Kerry.
    also excuse my ignorance but what does M&E mean?
    Thanks
    Kate


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


    Carraig77 wrote: »
    Thanks very much.
    I think some of the high cost is high spec eg aluclad windows.
    Any recommendations for a BER assessor. Based in Kerry.
    also excuse my ignorance but what does M&E mean?
    Thanks
    Kate
    For recommendations for a BER assessor you could post in this thread in the usual format :)


  • #5
    AnarchistKen
    Registered Users, Registered Users 2 Posts: 129 ✭✭AnarchistKen


    M&E is Mechanical (Plumbing etc) & Electrical fit out.

    For your information I have recently carried out cost exercises on alu-clad versus aluminium and have found that aluminium is more cost effective. Systems such as Raynaers Eco might yield you some savings versus alu-clad.

    Best of luck anyway with the build


  • #6
    Carraig77
    Registered Users, Registered Users 2 Posts: 37 ✭Carraig77


    Thanks for the info anarchistken.
    I'll check it out.

    Sorry about that muffler. I did as you suggested.

    Kate


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