How to Replace Concrete Driveway Joints

Driveway expansion joints allow parts of the driveway to contract or expand without damage. They also absorb the shock of any shifting due to frost in the winter. Without these joints, stress exerted on the concrete will cause it to crack. Over time, these joints may breakdown and leave large gaps between the concrete. Not only will unsightly weeds grow in these cracks, the concrete could permanently shift leaving some very large gaps where some of the joints were and almost no gaps in the other joints. Replacing the expansion joints will help ensure a long life out of your driveway.

Pry bar or large screwdriver
Foam backer rod
Utility knife
Silicone caulk
Caulk gun

Instructions

- 1
  Remove any remaining expansion joint material out of the crevices. Use a pry bar or large screwdriver to slowly work it up and out of the crack. Sweep the area clean with your broom.
- 2
  Press foam backer rod into the crevice. Start at one end of the driveway and slowly work it into the crevice with a large screwdriver. The foam backer rod should be slightly wider than the crevice in the driveway you are filling and when installed should sit about 1/4 inch below the driveway's surface. Cut off any extra backer rod with your utility knife once you reach the other side of the driveway.
- 3
  Load your silicone caulk tube into your caulk gun. Fill the crevice with an even bead of silicone caulk along its entire length.
- 4
  Smooth out the caulk bead with a wet finger. Allow to cure for the recommended time stated on the caulk tube before walking or driving on the driveway.

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