Accidentally drilled clear through my concrete floor...

[ccflyn]

Hi,

So I accidentally drilled through my concrete floor down stairs twice... Will this be a problem? I was installing some anchor bolts which are now in the holes but Im just a bit concerned I may have potentially damaged some sort of damp proofing or something. Should I be worried?

For info I drilled through the concrete floor of my house with 2 x 12mm holes, now filled with the anchor bolts. Clearly there is a void about 100 - 120mm under the concrete floor, I assume for pipework and the like.

Any info would be much appreciated.
chris

 

[Notch7]

How deep did you drill?

If oil started coming up, youve gone too deep?

Newish house, maybe you drilled through screed and into the insulation?

 

[ccflyn]

I'd be OK if I struck oil Im not too sure as Im not too sure how the house was built. I live on a hill so I know there is a sizable void between my floor and the ground underneath. I didnt know there was insulation under concrete floors. Any builders know if its OK?

 

[ccflyn]

OK, so I think my panic is over. I found a diagram of how the sub structure of my house was built. I remember them doing this when I would check to see how far they had got. I think you are right Notch7, I probably ended up in the insulation after the screed.