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Drill a 10cm dia hole in reinforced concrete

Postby torsheedavies » Thu Dec 18, 2008 11:22 am

The house has a downstairs toilet only. I want to put one in the bathroom which is directly overhead. There is a waste pipe from the bathroom down through the reinforced concrete floor. The floor is 18cm thick. The hole for the waste pipe is about 5cm dia. I do not want one of the electric toilets which would grind the waste up to pass down a small pipe. So I need to make a 10cm dia hole in the reinforced concrete. What is the best way to do this?
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Simply Build It

Postby stoneyboy » Thu Dec 18, 2008 12:31 pm

Hire yourself a diamond core bit and drill.
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Postby plumbbob » Fri Dec 19, 2008 9:37 pm

Be very careful as drilling that size hole through a concrete floor may depending on the construction, seriously compromise the structural integrity of that section of floor.
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Postby TheDoctor5 » Tue Jan 27, 2009 8:39 am

Last year 64% of the questions asked in our forum were answered within our DIY project pages at The project pages are now separated alphabetically and your answers are accompanied by diagrams and the ability to see, and buy, the tools and/or required to complete your project. Use our search box to look for your answer and save a great deal of time and money!
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