An expansion joint is a planned separation incorporated within a building structure to relieve stress on materials caused by natural movement. These movements occur primarily due to thermal expansion and contraction from temperature changes, wind-induced sway, and seismic activity.

Expansion refers to the increase in the size of a material when heated, while contraction is the decrease in size when cooled. A simple example is the rise and fall of mercury in a thermometer when exposed to heat or removed from it.

In construction, a concrete expansion joint is a deliberate gap that allows concrete to expand and contract safely. It is placed between concrete and adjoining structures to enable independent movement, preventing cracks and structural damage. These joints also help absorb vibrations and accommodate soil movement during events like earthquakes.

This is essential work carried out by our specialists in construction repair , ensuring long-term durability and structural safety.