1. Visiting from the US? Why not try DIYnot.US instead? Click here to continue to DIYnot.US.
    Dismiss Notice

Piling costs check

Discussion in 'Building' started by phills1, 9 Sep 2016.

Tags:
  1. phills1

    phills1

    Joined:
    9 Sep 2016
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Can someone please help, we are building a single level extention. 4m out from the house and garage by 12.55m long. The house footings go down past 7ft so strip foundations are out, due to 50+ft trees near. How much should a piled soltiuon be with a floating raft. I think 16K + vat is a rip off....
     
  2. Sponsored Links
  3. dom_k

    dom_k

    Joined:
    7 Aug 2016
    Messages:
    35
    Thanks Received:
    10
    Country:
    United Kingdom
    If the 16k includes the reinforced ground beams and pile caps it isn't too bad. Have you consider a pad and beam solution?
     
  4. phills1

    phills1

    Joined:
    9 Sep 2016
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Building inspector said footings would need to be at least as deep as house, so waste removal and concerate in becomes sky high. The 16K + vat is the piles and a floating concerate raft. The foundation change has added almost 20K for the build. Think it's about 11 or 12 piles if memory serves.
     
  5. KenGMac

    KenGMac

    Joined:
    24 Aug 2010
    Messages:
    3,175
    Thanks Received:
    572
    Location:
    Ayrshire
    Country:
    United Kingdom
    phills1, good evening.

    You do not say what type of piling you are considering?

    Are they bored, or driven? and do you have a Soils investigation?

    Have you and the designer looked at Shire piling? the reason I ask is that Shire are the second [behind Uretec] as the preferred repair method by ALL Insurers when undertaking Subsidence repairs of property, as an aside Shire can be considered on a new build, indeed they produce a system for use in conservatories, notorious for subsiding, poor build and a bunch of cowboys doing the work on the cheap?

    Ken.
     
  6. phills1

    phills1

    Joined:
    9 Sep 2016
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    They are bored, no soils invesitagtion, we have a 7ft deep hole to detect the existing house footings which go down past 7ft. Plus on land just outside out boundary we have 40/50ft+ trees. Building inspector said strip would need to be at least as deep as house. Hence piling to stop costs going up and up on foundations. This is not for a conservatories but a proper brick build. I'm just trying to check I'm not been done on piling costs
     
  7. dom_k

    dom_k

    Joined:
    7 Aug 2016
    Messages:
    35
    Thanks Received:
    10
    Country:
    United Kingdom
    Where are you based in the uk?
     
  8. phills1

    phills1

    Joined:
    9 Sep 2016
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Essex
     
  9. KenGMac

    KenGMac

    Joined:
    24 Aug 2010
    Messages:
    3,175
    Thanks Received:
    572
    Location:
    Ayrshire
    Country:
    United Kingdom
    phills1, Hi again.

    The piling system I have mentioned is capable of halting completely Subsidence in a two story brick built property?

    I used the example of a Conservatory as a guide into what can be achieved by this type of system, that is a bored auger with a steel rod, the rod can then be attached to a Reinforced ground beam at a "Sensible" depth so as to mitigate earth removal and large costs of Concrete.

    I would suggest that you at least have a look at the Web sites for this product? they can also provide the requite Calculations as required by Building Control Etc.

    My thrust is that if the insurers have successfully used this system to shall I call it "Economically" stop Subsidence permanently in a two story property with trees a lot closer than your problem and in London Clay, notorious for clay shrinkage Subsidence is at least to me, worth a look? might save you a couple of Quid???

    What have you got to loose? as for the Structural Engineer, remember he will be reimbursed on the total final cost of your project? and how switched on is he?

    Where am I coming from? I work as a Subsidence Claims Specialist for Insurance Companies. As previously stated, if the insurers, all of them use Shire rather than conventional bored piling methods what does that tell you in pounds and pence???

    Ken
     
  10. Sponsored Links
  11. phills1

    phills1

    Joined:
    9 Sep 2016
    Messages:
    15
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks Ken, I do have to be careful due to medium pressure gas pipes x2 and a gas main just over the boundary will take a look. How does one check they are not been ripped off...
     
  12. chappers

    chappers

    Joined:
    27 Aug 2004
    Messages:
    3,254
    Thanks Received:
    357
    Country:
    United Kingdom
    You get several quotes and compare them, does your engineer not have any recommendations.
     
  13. tomfe

    tomfe

    Joined:
    27 Aug 2014
    Messages:
    1,262
    Thanks Received:
    160
    Country:
    United Kingdom
    I may sound stupid but have you costed standard strip foundations to 2m depth? Can't you loose some/ most of the soil in landscaping?
    I did a rough calc, (4+13+4)x2x.5 is about 20m3 so 1800k for concrete, x 2 for bulking soil 40m3 a grab can take 8m3 so that's 5 loads at £150 so 750. Labour plant about 3k, so totals about 6k x 1.5 for south prices you've about 9k then lay a bnb floor.
     
  14. noseall

    noseall

    Joined:
    2 Feb 2006
    Messages:
    39,478
    Thanks Received:
    2,501
    Location:
    Staffordshire
    Country:
    United Kingdom
    We've excavated 2.4m deep foundations. Tricky but just about doable with a three tonne digger.
     
  15. cjard

    cjard

    Joined:
    6 Sep 2008
    Messages:
    2,335
    Thanks Received:
    251
    Country:
    United Kingdom
    at that depth, do the sides need shuttering? Was it full fill wih concrete?
     
  16. noseall

    noseall

    Joined:
    2 Feb 2006
    Messages:
    39,478
    Thanks Received:
    2,501
    Location:
    Staffordshire
    Country:
    United Kingdom
    Probably would have been useful. We took down a subsiding connie and replaced it with an extension. The connie had actually been underpinned but it was still not excavated to virgin earth, so the thing just kept on rotating/sinking. We had to fight through big lumps of concrete in order to excavate. Absolute nightmare of a dig.
    The whole footprint was on made-up ground.
    Yes, mass filled.
     
    • Like Like x 1
  17. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page