Turn on the saw and slowly guide the blade into the concrete.
How to cut through a concrete block wall.
Slowly guide the blade along the line until you get to a corner.
A power saw produces a cleaner more even cut than does chiseling.
When fitted with a carbide grit blade reciprocating saws work well to cut and shape concrete block.
Cut through the remaining lines until you have created the opening.
For a larger project or more accurate cuts a circular saw with a concrete blade is a good option.
The saws can be difficult to control but offer a wider range of cuts than many masonry and circular saws.
Step 5 insert the masonry saw blade in one of the holes and cut along the line.
Concrete is a mix of sand gravel cement and water and it is everywhere.
Cut the block allowing the saw and blade to do most of the work don t apply too much force.
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.
Builders use many techniques to run pipe through concrete block walls but the easiest and most efficient way is to use a core drill.
Back the saw out after about 30 seconds to avoid overheating.
Don t force a blade into a cut.
Remove the saw blade and start in the other direction following the same procedure.
Hold the concrete saw up to the wall and line up the blade with the line.
Score the length of the cut three or four times with the chisel.
Use relatively smooth grits to cut neatly but slowly and use coarser grits for a fast but less tidy cut.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
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.
Make a series of passes until you have cut through the concrete block.
A circular saw with a masonry blade can also be used to either score or completely cut through the block.