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Screw piles for extension

  • 03-09-2025 12:24PM
    #1
    jiminho
    Registered Users, Registered Users 2 Posts: 433 ✭✭


    Just finishing off a self build garden room and went with screw piles for the foundation. Very impressed with the end product which got me thinking, is it possible to use screw piles as a foundation for a timber frame extension?



Comments

  • #2
    Merrion
    Registered Users, Registered Users 2 Posts: 1,430 ✭✭✭Merrion


    We did precisely that 2 years ago. Timber beams on the top of the screw piles and extension built up on top of that.
    Cross laminated timber rather than traditional timber frame, attached with L brackets and bolts - but no reason why you wouldn't do the same for a traditional timer build.

    back_wall.jpg big_screw.jpg

    foundations.jpg


  • #3
    jiminho
    Registered Users, Registered Users 2 Posts: 433 ✭✭jiminho


    https://www.boards.ie/discussion/comment/123788474#Comment_123788474

    Thank you very much. Very helpful. And no issues with compliance letter on the back end? That looks like a two storey extension as well



  • #4
    Merrion
    Registered Users, Registered Users 2 Posts: 1,430 ✭✭✭Merrion


    It's a single storey extesnion with a monopitch roof so the roof is nearly 2 stories high at the top end.

    No issues with compliance - the engineer did all the calculations (he had never used these before) and it is probably quite over-engineered. You have to get the company out to do a "pull test" to check you ground is suitable.



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