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

New concrete garage floor - depth at entrance

Discussion in 'Building' started by kingandy2nd, 27 Apr 2020.

  1. kingandy2nd

    kingandy2nd

    Joined:
    29 Jan 2008
    Messages:
    1,468
    Thanks Received:
    174
    Location:
    Liverpool
    Country:
    United Kingdom
    Hi all,

    Hope everyone is well in these strange times. I'm continuing with my slow extension build, and I've finally started laying the foundation blocks. I've now come up with a question which I'd like some advice on regarding the garage door opening, and how to design the floor.

    My plans just say: "150mm concrete slab, 1200 gauge DPM, sand layer, 150mm well compacted hardcore". Although not spec'd, I have ordered 7mm A193 mesh for this too.

    Around the rest of the walls I have a single layer of 140mm high 7nm foundation blocks, but I am unsure what to do at the entrance to the double garage. I could:

    1. Continue the run of foundation blocks, which will effectively hold the hardcore in place, and then concrete on top of the blocks. Meaning a continuous 150mm concrete floor, on top of the foundation blocks at the entrance.

    2. Stop the blocks at the opening, slope the hardcore down to the foundation, add additional mesh, and shutter the opening and effectively have a 300mm think edge to the concrete floor which is all the way down to the foundation.

    I have seen a diagram somewhere showing option 2, but I can't for the life of me find it now! So apologies for the crudely drawn pictures, but I hope it helps explain!

    Any views on which is better option? I think 2 will give better strength but don't know if it's over-kill for a domestic garage. Garage door will be 4.8m wide if that makes a difference.

    Thanks
    Andy

    IMG_4302.JPG
     
  2. Sponsored Links
  3. 23vc

    23vc

    Joined:
    17 Apr 2015
    Messages:
    2,506
    Thanks Received:
    398
    Location:
    Warwickshire
    Country:
    United Kingdom
    Think you’d normally just shutter it, that’s how I did mine. Why have you got a foundation across under the door though?
     
    • Thanks Thanks x 1
  4. kingandy2nd

    kingandy2nd

    Joined:
    29 Jan 2008
    Messages:
    1,468
    Thanks Received:
    174
    Location:
    Liverpool
    Country:
    United Kingdom
    Thanks for your feedback.

    The foundation was designed by the engineer at the piling company. It's basically an E shape with the 3 tips of the E against the existing house/foundation...I guess this bit under the garage door provides some support to the outer parts.
     
  5. 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