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

Building near retaining wall

Discussion in 'Building' started by qwertybob, 28 Dec 2014.

  1. qwertybob

    qwertybob

    Joined:
    27 Dec 2014
    Messages:
    1
    Thanks Received:
    0
    Location:
    Gwent
    Country:
    United Kingdom
    Hi all,

    I'm looking at the feasibility of building a single-storey side extension (marked in red on the sketch) on a property I don't yet own. It would be built well within 3m from neighbours garage and a retaining wall.

    I believe the depth of foundations is likely to be an issue, and the presence of the retaining wall is leaving me a little confused.

    Which of the following approaches would be correct?

    Consider base of retaining wall foundations as foundation depth as side foundation of garage on upper side of wall would be supported by the wall and in turn its foundations.

    Consider base of garage foundations as foundations depth.

    thanks for reading.

     
  2. Alastairreid

    Alastairreid

    Joined:
    21 Nov 2008
    Messages:
    6,651
    Thanks Received:
    1,081
    Location:
    uk
    Country:
    United Kingdom
    What does the engineers drawings say ?
     
  3. Sponsored Links
  4. noseall

    noseall

    Joined:
    2 Feb 2006
    Messages:
    42,610
    Thanks Received:
    2,638
    Location:
    Staffordshire
    Country:
    United Kingdom
    You may have to dig the adjacent wall foundation in stages rather in one hit.

    Engineers, building control, architects etc, love to put the onus onto the builder regards these little gems. I like to respond with the 'duty of care' statement. :p
     
  5. theprinceofdarkness

    theprinceofdarkness

    Joined:
    25 Feb 2005
    Messages:
    1,416
    Thanks Received:
    202
    Country:
    United Kingdom
    I once built a garage in the situation of your neighbours garage. Using a 9" fence borer, I dug holes at 4' centres down to a stable level of soil, about 5' on the step side and 2' on the side adjacent to the house. each hole then had 4 vertical rebars in which were bent over to join the rebars that sat in the ring beam (about 18" wide and 6" thick) and innto the over site 4" concrete which also had mesh laid in it. It seemed OK after 25 years.
    So in your case I would put in the hole every 3' and 3' deep with a beam across the top of them with the rebars in, on the retaining wall side. Leaving the soil in between the holes should keep everything in place during the construction time.
    Frank
     
  6. 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

     
  7. Sponsored Links
Loading...

Share This Page