Once you ve laid out the joints to be cut mark them using a chalk line.
Cutting lines in concrete driveway.
Score the length of the cut three or four times with the chisel.
One thing to be aware of before we go further.
Using a metal jointing tool the.
A circular saw with a masonry blade can also be used to either score or completely cut through the block.
When you re cutting concrete that is already poured and finished use a chalk line to mark the region.
Step 2 place the tip of a walk behind concrete saw blade over the center of one line.
Don t force a blade into a cut.
You ll ideally run a trickle of water.
Apply the line as thick as possible.
In hot weather concrete might crack if joints are not cut within 6 12 hours after finishing concrete.
Mark the places you want to cut on the concrete slab either using chalk line good for long straight edges or chalk.
Professionals who install concrete driveways install crisp tooled lines in the slabs.
The lines act as pre weakened stress points that encourage the concrete to crack at these locations.
What kind of saw to use.
The outside lines indicate where the concrete should be cut.
Factors such as curing techniques slab thickness slab length and base type must be analyzed before selecting where joints should be cut.
Designate the area of finished concrete to be cut using chalk lines.
Lift the line simultaneously from each end and slap it to the ground.
A good rule of thumb is to make your cut the thickness of your concrete.
Measure to the left and to the right of the chalk line 2 inches and snap two additional chalk lines.
Make sure you are cutting joints soon enough.
Get a friend to hold one end while you hold the other and run the line over the region to be cut.
If of your slab s thickness doesn t reach 1 make sure you still cut at least a 1 depth.
If your cut doesn t need to be exact use a cold chisel and hand sledge to cut the concrete.
These are called control joints.
The joints can also be installed as soon as the concrete hardens by using a diamond saw that cuts the line.
How to saw cut concrete.
If you re using water cutting equipment make sure that the water is running all the way down to the blade.