I recently purchased a Makita DHP 453 18V cordless combi drill, and with the drill set to hammer mode, Setting 2 and using a 6mm masonry bit I attempted to drill a hole into one of my flat's dot & dab walls in preparation for hanging a heavy picture. However, once I had drilled through the plasterboard the tip of my masonry bit almost immediately hit the solid wall behind, leading me to believe that there is a very small amount of space between the plasterboard and the solid wall, and not the usual 15mm of space.
I continued trying to drill my hole into the solid wall, but no matter how much force I used I could not make any dent in the solid wall. I had assumed that the solid wall was brickwork, but after doing some Google research I think that it might be reinforced concrete (my home is an ex-council flat, and apparently this type of construction is not uncommon in ex-council flats).
Can anyone advise whether I am correct in thinking that my solid walls are reinforced concrete and if they are, should I be using an SDS hammer drill instead of my cordless combi drill?
Thanks
