A circular saw with a masonry blade can also be used to either score or completely cut through the block.
How to cut through a concrete block wall.
Slowly guide the blade along the line until you get to a corner.
Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill.
Concrete is a mix of sand gravel cement and water and it is everywhere.
Remove the saw blade and start in the other direction following the same procedure.
Cut around the entire block with the saw then adjust it so it will cut 1 4 inch to 1 2 inch deeper into the block.
The saws can be difficult to control but offer a wider range of cuts than many masonry and circular saws.
Cut the block allowing the saw and blade to do most of the work don t apply too much force.
Make a series of passes until you have cut through the concrete block.
Choose which side you will start with and punch a hole in the other side with a sledgehammer which will help draw concrete dust away from you as you cut through the wall.
Score the length of the cut three or four times with the chisel.
A power saw produces a cleaner more even cut than does chiseling.
For a larger project or more accurate cuts a circular saw with a concrete blade is a good option.
Back the saw out after about 30 seconds to avoid overheating.
Hold the concrete saw up to the wall and line up the blade with the line.
Mark the cut and clamp the stone or paver to a stable work surface.
Use relatively smooth grits to cut neatly but slowly and use coarser grits for a fast but less tidy cut.
When fitted with a carbide grit blade reciprocating saws work well to cut and shape concrete block.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
Don t force a blade into a cut.
Core drills are expensive tools and not something that the.
Turn on the saw and slowly guide the blade into the concrete.