Red Seal Bricklayer Practice Exam

The role of expansion joints in masonry is fundamentally about accommodating movement. When materials like brick and mortar are exposed to varying temperatures, they can expand and contract. If this thermal movement is not managed, it can lead to cracking and structural damage over time. Expansion joints serve as intentional gaps that allow for this movement to occur without imposing stress on the surrounding masonry.

This is particularly important in large walls or structures where one section may expand or contract at a different rate than another due to temperature fluctuations. By providing a designated space for this movement, expansion joints help maintain the integrity and longevity of the masonry work, preventing unsightly cracks and potential failure of the structure. Additionally, they are typically filled with flexible materials that can move with the masonry, providing further protection against the stresses created by temperature changes.