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

Attaching fence post to house wall - DPC required?

Discussion in 'In the Garden' started by ray.birch, 25 Nov 2019.

  1. ray.birch

    ray.birch

    Joined:
    11 May 2016
    Messages:
    70
    Thanks Received:
    4
    Country:
    United Kingdom
    Good evening all! I'm shortly looking to put up a new fence *above an existing wall* in our front garden.

    -BACKGROUND INFO-
    The (single brick) wall is not in a great state and the intermediary pillars are on the neighbour's side, but she has asked us to put a fence up in order to hide our bins, which in the interests of keeping things civil we are looking to go ahead with.

    Where we have soil, I've dug holes to put concrete-in post supports in. The ground nearest the house however is block paved, and so I'm looking to mount a half height fence post to the wall of our house.

    -EXAM QUESTIONS-
    1. Because I'm not sure about the quality of the brick (it's render over the top of a 1920s house, and previous DIY work has shown some of the bricks to be quite crumbly), I'm thinking about using c.10mm threaded rod epoxied into the wall to hang the post. If there are any better methods that anyone would suggest, I'd be more than grateful!

    2. Having looked around, there seems to be various advice about not bridging any DPC. I don't *think* that this should be an issue, as the fence post doesn't run all the way to the ground. I would be looking to attach the post above the lip of the render, per the terrible diagram I've constructed below. That being said, I'm still keen to avoid creating any damp issues down the line!
    - Some people have suggested using silicone sealant behind the fence post before attaching?
    - Others have suggested leaving a space between the wall and post using spacers (I don't feel that this is a good idea)?

    If this or any other methods would be best, I'd appreciate any advice!


    .. | ||
    .. | || P
    H | || O
    O | || S
    U | || T
    S \
    E |
    _____|__________

    Many thanks for taking the time to look!
     
    Last edited: 27 Nov 2019
  2. ray.birch

    ray.birch

    Joined:
    11 May 2016
    Messages:
    70
    Thanks Received:
    4
    Country:
    United Kingdom
    Hey all! I'm *hoping* to potentially get started on this either tomorrow or Friday - using threaded rods still seems to be the best way forward unless anyone has any concerns.

    It just then comes down to whether I'm likely to get any damp issues with having the fence post directly bolted to the wall (and if there is anything I should do to mitigate?)

    Many thanks!!
    Ray
     
  3. Notch7

    Notch7

    Joined:
    15 Sep 2017
    Messages:
    17,038
    Thanks Received:
    1,210
    Location:
    Sussex
    Country:
    United Kingdom
    Im not sure it matters much either way.

    spacers would allow the back of the post to dry out, whereas bolted tight will stay damp - long terms though its seems likely the gap will fill up with crud -old leaves etc.

    I wouldnt bother with silicone -thatll be messy.

    if you have some flashband I would use that on the post, heated and use a roller to really stick on -that would keep the wood dry.

    threaded rod is fine, or ralwbolts.
     
    • Thanks Thanks x 1
  4. ray.birch

    ray.birch

    Joined:
    11 May 2016
    Messages:
    70
    Thanks Received:
    4
    Country:
    United Kingdom
    Thank you very much Notch. I do have some Flashband and also DPC but am not really sure whether either is required - or even appropriate in these circumstances.
    I guess my thoughts are that the wood is going to get wet regardless being exposed to the elements - I just want to make sure that I'm not causing any issues to the house by attaching it directly to the render.
    Many thanks once again.
     
  5. domdee

    domdee

    Joined:
    29 Nov 2016
    Messages:
    172
    Thanks Received:
    22
    Location:
    East Yorkshire
    Country:
    United Kingdom
    i wouldnt bother with anything if it was me. if you run DPC up the wall moisure will still get behind it. and the same goes if you flash band the post. however if you really wanted something you could flash band on the render may be the best route.
     
  6. MrBenchmark

    MrBenchmark

    Joined:
    25 Jan 2007
    Messages:
    1,538
    Thanks Received:
    275
    Location:
    London
    Country:
    United Kingdom
    Little tip..being a plumber i have found the fischer bolts that are supplied used for fixing wall mounted basins ideal for fixing concrete posts. 1 end goes in to the suppled rawlplug and the other end will take a large washer and supplied nut to secure the post.

    https://www.toolstation.com/fischer-wash-basin-fixing-kit/p86297
     
    • Thanks Thanks x 1
  7. Sponsored Links
Loading...

Share This Page