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How To Fit Fence Post with Concrete Bolts

How to Install Fence Posts Using Concrete Bolts

August 1, 2019 - 1 Comment - 3 min read

Over the last week, we’ve been finishing off our DIY pallet slat fencing. This was a job we started last year but ran out of pallets – typical! We’ve replaced two fence posts for this job, using only concrete/masonry bolts this time – which made the job s a lot easier. So I thought I’d make a dedicated post for using them and share in a bit more detail.

This seriously simple DIY is for anyone looking to install fence posts or gate posts against a brick wall, or into a concrete floor. You can also use this method for anchoring decking joists or other mounting other items against concrete or brick. These bolts are super versatile (well, as long as you’re using them in concrete/brick!), and I think you’ll find them really easy to use.

How to Install Fence Posts Against a Brick or Concrete Wall Using Concrete Bolts

How to use concrete bolts

You Will Need:

Step 1 – Drill a hole into your fence post and brick/concrete wall

Depending on what width your bolts are, you’ll need a drill-bit to match. For our fence posts, we’re using 10mm bolts, which means we needed a 10mm drill-bit. Make sure you’re using a wood drill-bit for this job and begin by drilling two/three holes into your fence post, evenly spacing them apart. As we only have a low-level brick wall, we only needed two.
Hold your wood in place against the wall, making sure it’s straight with a spirit level. Whilst holding in place (a helping hand is always useful!), mark up the same holes onto the brickwork behind. The easiest way to do this is by drilling two very small pilot holes through the hole in your fence post.
Once marked, drill out the hole (again using a drill-bit in the same width as your bolt), making sure you go deep enough for the bolt to be inserted into. You’ll need an SDS or hammer drill for this, or otherwise a drill that has a hammer mode and also a masonry drill-bit.
Installing a fence post against a brick wall

Step 2 – Clear out dust from the hole

Once your holes are drilled, you’ll need to clear out the dust from the back of the hole. You can get the bulk out with your drill by moving it back and forwards. We have this little hole-cleaning brush which also helps too.
How to clean dust out of drilled holes
Optional: Wrap some damp proof membrane around the bottom of your fence post
If your fence post will be sat slightly in the ground, you can prolong its life by protecting the base from water in the ground. We’ve used a sheet of damp proof membrane for this, wrapping it tightly around the base of the fence post. Use galvanised clout nails to secure (these won’t rust!).
Protecting the bottom of a fence post against rot

Step 3 – Add your bolts!

Hold your fence post in position against the brickwork once again and simply attach your concrete bolt, through the fence post and into the wall. You’ll need a ratchet set to do this, making sure not to overtighten your bolts. If your wall isn’t perfectly straight, you can use packing shims behind the post to pull it forwards where necessary to make sure your post is straight.
How to use concrete bolts outdoors in fence posts

How to Install a Fence Post Into a Concrete Floor using a Metal Base

If you’re looking to install a fence post ontop of a concrete floor, then these fixings are also brilliant. To save yourself the effort of digging the concrete up, why not use metal bases and affix these onto the concrete floor? Providing your floor is level, you’ll be able to simply mark up the four holes you need on the floor, drill out (again using the same width drill-bit to match your bolts!) and bolt in. You can then insert your fence post and voila – job done!
Installing fence posts against low brick walls
It really is that simple! You can use these bolts for a whole range of different uses. They’re quick, easy to use and so far, they seem really strong and hard-going. We’ve used 1.5 packs to date in a range of different scenarios, including building a platform for the tumble dryer in the laundry cupboard! Hope this was helpful, if you have any tips for us – let us know down below!


*This post may contain affiliate links.

DIY Installing Fence Posts with Concrete Bolts
Kezzabeth

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1 Comment

  • Dan October 27, 2022 at 3:57 pm

    Really useful article, thanks!

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    Hi - I'm Kezzabeth! Self-taught DIYer, Renovator and Blogger on a mission to turn our house into a home. Seven years ago I was clueless and skill-less, but since then I've learnt how to build, tile, plumb and more. This is my little place on the web where I share everything I've learnt so you can learn too. Read More

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    DIY Content: We’re not builders or experts in the trade industry, so please take any information on this blog as a rough guide and just our own experiences. This blog relates to our home only and you should always consult a professional in you’re in any doubt of work. Please also be aware Building Regulations change often, so always do your own research as well.
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