Damp Proof Membrane and drilling

Joined
11 Dec 2008
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Location
London
Country
United Kingdom
Hi guys
I was bolting down my downstairs toilet into the concrete floor. I drilled down 10cm into the concrete floor to fit the plugs and at about 8cm the drill came out the other side - i was not expecting this. Will I have I drilled through a DPM? Do I need to seal the hole? What should I use? The house is a 1980's Barratt home. Thanks in advance.
 
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