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Advice on my plan to build a fence on top a wall

Discussion in 'Building' started by champy, 16 Jul 2021.

  1. champy

    champy

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    Hey guys, I'm planning to attach a living wall structure to an existing brick wall and would like to check that I'm not overlooking anything. I've attached a rough diagram of what I'm thinking.

    the wall is structurally sound, double skin, 1.4m high, 10m long.

    The living wall will be made of 2x3 at 2m heights on 0.8m centres. (red posts) The planter boxes for the living wall will be attached between the 2x3 all the way up their height.

    This will leave 0.6m of the living wall exposed above the existing brick wall which will look unsightly from street view.

    I was planning to clad the back side of this with slatted fence battens to screen the structure but am worried about wind and leverage on the 2x3 blowing the entire wall over. So I thought about building an independent 2x3 frame (blue posts) on top of the brick wall, in front of the living wall, and cladding that.

    All framing will be fixed with threaded rod and resin.

    Am I missing anything?

    Am I ok just attaching the battens to the living wall structure?

    Thanks in advance!

    image.png
     

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  3. Scarlet Pimpernel

    Scarlet Pimpernel

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    The greater part of the wind loading will be on the highest parts of the structure, due to leverage, so I can't see your boarding lower down adding any greater wind loading.
    Your living wall will generate some wind loading, which will increase as the plants grow.
    Are you using tanalised timber?
     
  4. champy

    champy

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    yeh tanalised and spaced of the wall with a washer.

    I’m only worried about the 0.6m above the wall for wind load that’s why I thought the separate structure would act as a wind break for the living wall. But do you think I even need it for 60cm if height. Could I get away with just battening the living wall timbers?
     
  5. Tigercubrider

    Tigercubrider

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    street view?
    have you checked with planning that this is allowed? (front garden?)

    "Unsightly from street view" is easily fixed by training climbing foliage on the street side.
     
  6. champy

    champy

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    Back garden, ginnel view I should say and yeah planning is fine. The wall is rendered on the exterior, connected to the house so a fence will be more visually pleasing than a climber.
     
  7. noseall

    noseall

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  9. stuart45

    stuart45

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    Handy to have a photo to answer 2 different threads.
     
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  10. champy

    champy

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    No not really. Like I said the wall is 1.4m high and the frame is attached to the wall, not concreted in the ground, hence my starting this thread about wind load on a frame protruding 0.6m above the wall its attached too.
     
  11. noseall

    noseall

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    So is the one in the image...?o_O
     
  12. champy

    champy

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    Oh really? sorry I couldn't tell from the pictures. Can you tell me more about it?

    So the black uprights at the back, they're attached to the back of the wall, not concreted in to the ground? Are they wood are steel? And I'm guessing you've had no issues with wind load?
     
  13. noseall

    noseall

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    I had them fabricated from 50mm x 50mm SHS.

    I asked for them to be painted black with plastic black stoppers in the top.

    They have a 75mm crank so that they sit on top of the wall.

    They have a drilled footer plate so that they are fixed to the foundation toe as well as the wall face (pre drilled hole) with concrete screws, and fixed again into the headers via an angle bracket fixed to the bottom of the timber upright.

    The upright posts are fixed via x3 Spax large headed screws and a through bolt at the top.

    The upright featheredge are fixed to 3 arris rails in total.

    I made *two prototypes out of 45mm timber and took them to the steel manu.
    (*concrete foundation steps up)
     
  14. champy

    champy

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    Thanks so much man, that's really helped a lot!
     
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