Locate the area of the concrete floor where you would like to cut the channel.
Cutting a trench in concrete slab.
Set the diamond blade on the concrete wet saw to a depth of 4 1 2 inches and cut along both chalk lines.
Extend the groove the length of the fresh mortar.
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The slab was about 4in thick with wire mesh and a plastic barrier between the concrete and the wet clay like soil home located in new orleans.
Check to make sure there are no electrical or plumbing lines.
Don safety glasses hearing protection and steel toed boots for protection.
Concrete slab repair for plumbing trench i ve just cut several trenches 2 3 ft wide x 25 ft long in my existing concrete slab to run plumbing.
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Step 5 install the pipes to finish the job mix the cement and spread a layer about 3 inches thick around the mouth and sides of the drainage channel.
Allow at least 48 hours drying time.
With the jackhammer cut the drainage channel down to where you dug the trench in your yard so that the water will flow in the correct direction.
Connect one end of a.
Step 5 create a groove in the new mortar with a round nosed trowel.
Mix new mortar in a wheelbarrow and pour concrete into the trench you cut.