Concrete joint repair knowledge is essential because of the number of forms that come with concrete expansion joints. Commercial ones are made from metal and looks like teeth or straight line gaps. Residential joints can be made from rubber, caulking, wood or foam. These joints are essential in allowing concrete to expand and contract according to temperature.
Some Causes of Damage
Concrete joints that have been left open will allow water to seep into it. This can crack or displace the concrete especially if the water freezes in cold weather. The gaps can also be grown with trees, shrubs and weeds and the slabs can be lifted off and cracked with their roots.
Using the Right Tools
To break, pull and lift the concrete slabs, use a chisel, hammer and a pair of pliers. Debris, wooden pieces and joint caulking should be vacuumed off. The old joints should be removed in order to prevent further damages on the joint.
Using Foam Backer Rod
To allow concrete to expand and contract from weather changes, press a foam backer rod forcefully into the joint. The rod is thick and durable foam, which is better to use than wood joints.
Sealing the Joints
Concrete joints should be sealed with a urethane sealant which is self leveling. A caulking gun is used in the application of thick sealant layers, which is applied from one joint edge to the other.