If you are working with a concrete block foundation wall rather than solid concrete you may be able to use a carbide tipped core bit on a hammer drill to cut through the block walls.
How to cut hole in concrete block wall.
Cutting hollow concrete block first score the line.
A circular saw with a masonry blade can also be used to either score or completely cut through the block.
Cutting a hole through a cinder block wall is a messy and time consuming project and it requires safety equipment such as ear plugs a respirator and eye protection.
Patching a hole in a cinder block wall requires some time along with the appropriate materials to make the repair.
Cinder block is a useful construction material since it is normally lighter than solid concrete and yet still durable enough to last under normal stress conditions.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
Score the length of the cut three or four times with the chisel.
Here s a few pictures of the right tool.
I just like to show you a little trick some time you have to install dryer went through the concrete walls all what you need is a cut off wheel and a littl.
I ve hammer drilled through concrete to sink anchors but a 4 inch diameter hole is a little intimidating until you have the right tool.
Cinder blocks can still be damaged by time and severe impact however.