I am attempting to put up a set of shelves. However, once I began drilling, it truns out that the wall (under the stairs, not external) is made of concrete blocks. I can drill a little bit through the plasterboard and a little bit of the masonry but then that's it. I think I am hitting stones etc and my drill can't drill through them without much effort and sore ears!! What is the best means of drilling holes in these blocks? Will I need a more powerful drill or just a special kind of bit?
Thanks.
Thanks.