DIY Doctor

Drilling into concrete posts

Postby scuz » Fri Jun 08, 2007 8:14 am

I wish to utilize an existing concrete post as a support for a wooden end post (slotted), because it is slotted I can't really use a clamping method. So I tried to drill threw it...I've removed 14 of them already so i know the position of the metal bars running threw them. It's just not happening! Tried using 'bits' for the obvious stone, masonry etc. I cannot remove this post as to the position of it and what is around it. Appreciate any ideas/advice.
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Simply Build It

Postby thedoctor » Fri Jun 08, 2007 9:04 am

Try using a very small drillbit first and then enlarging the hole. Posts are constructed using very small aggregate to stop any air getting into the finished compact mix. The stone availabkle for this size of aggregate is usually shingle which is about as gard as it gets. If you can start with a 4mm masonry bit and then work up you should be able to do it. The set in the link below has a 4mm bit in it. ... 071&m=1228
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Postby Mav » Tue Mar 07, 2017 3:26 pm

Hi there, We have recently bought our first house and have over 40m of 1.8m garden fence to repair/erect.

We want to have something a little more special than standard close board so we were looking to fix long lengths of T&G Shiplap cladding to the existing fence posts.

The existing posts are the 'H' concrete posts and I am concerned about cracking the concrete if I were to screw roughly 15 boards directly into them. Any help/knowledge about the feasibility of such a project or ideas of something different would be so appreciated.
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