Why are expansion joints significant in masonry?

Expansion joints play a crucial role in masonry by allowing for movement within the structure. As temperature changes occur, materials expand and contract. Without proper accommodation for this movement, stresses can build up in the masonry, potentially leading to cracking and other forms of structural damage. By incorporating expansion joints, the masonry can flex with these natural movements, helping to preserve the integrity and appearance of the structure over time.

This function is particularly important in environments where significant temperature fluctuations or differing moisture levels are common, making the management of expansion and contraction essential to maintain a sound masonry system.