What is a concrete expansion joint?
Expansion joints are a vital component of a properly poured concrete slab. These joints prevent concrete from cracking and breaking apart when it expands and contracts with changes in temperature.MaterialsConcrete expansion joints are constructed of sponge rubber, plastic, cork or fiber. These materials must withstand hot and cold weather.SizeConcrete expansion joints are typically between 1/4 and 1/2 inches wide. They are cut into the concrete surface and form a small crevice across the surface.SidewalksSidewalks require expansion joints only when they intersect with other sidewalks. The expansion joint must separate the two sidewalks.FloorsFlooring in buildings require expansion joints when they come in contact with walls.Proper InstallationExpansion joints must be properly installed in order to be effective. Improper installation will result in cracking of the cement.
