Fixing a 75mm fence post to a brick wall

Discussion in 'In the Garden' started by mazdaq, 6 Mar 2012.

  1. mazdaq

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    I need to fix a couple of 75mm x 75mm fence posts to a brick wall. I've read some recommendations for thunderbolts. What length of bolt would I need to get a good strong fix?

    I've also seen hex head bolts in screwfix - would they also do the job?
     
  2. Arthur2shedsJackson

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    Not really sure which screwfix product you mean.
    Do you mean the hex head style thunderbolt as opposed to the style with the sunked torx head?
     
  3. mazdaq

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  4. wrathkeg

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  5. Arthur2shedsJackson

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    I know that these bolts are good, we use this type all the time for floor fixing.
    I've never used them through wood though, but I can't see why there would be a problem.

    I would have said try and get at least 50mm into the wall, but you can achieve that with the 120mm bolts if you countersink the hole slightly ( drill out the size of the head) and that will hide the head too.

    Why Thunderbolts ? Can you not remove the posts after drilling? I would tend to use a plug into the wall for this application, but if you have to laeve the post in place then use the thunderbolts, I'm definitely not a fan of frame fixings for this type of installation, they tend to come loose.

    I assume that you are fixing the posts all the way up their length?
     
  6. mazdaq

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    Only reason I was thinking Thunderbolts was I'd read a few people recommend them.

    I can remove the post after drilling - would you use something like this to do the job:

    http://www.screwfix.com/c/screws-nails-fixings/frame-fixings/cat840068

    It's a 3ft fence so the post won't be particularly long - I was thinking of fixing it at 3 points along its length.
     
  7. Arthur2shedsJackson

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    No, They're what I wouldn't use.
    They come loose when used on fence posts in my experience anyway.

    I'd just use a normal wall fixing plug and contersink the hole about 25-30mm into the post, so that a 100mm scew would do. I like the rawlplug UNO ones, I find them superb in most applications.

    But by all means use the thunderbolts, I just wondered why.

    Good Luck :D :D :D :D
     
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  8. wrathkeg

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    well, when i used them it was just because the bloke at the fencing supplies place recommended them :) but they did work really well for my needs
     
  9. JohnD

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    can you get to the other side of the wall?

    makes it much easier to get a really strong fixing, using studding.
     

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