Other equivalent industry names include;
- Vertical-Articulation Joints
- Articulation Joints
- Control Joints
- Also commonly abbreviated to EJ, AJ or CJ)
Expansion Joints allow for controlled movement effectively to mitigate the occurrence of cracking and other linked defects.
They are now required to be installed in all un-reinforced (meaning constructs such as brick veneer house walls or standalone brick fences) masonry walls; except on land with certain soil classifications (determined by lab-testing and a structural engineer’s report).
Movement may occur due to material thermal shrinkage, material thermal expansion or earth movement. In general, these changes are brought on by climate or temperature (thermal) variations over the structures lifetime.
Expansion joints are not simply empty voids between individually built brick structures. Specific expansion-ties are built into the mortar beds to connect each structure. The expansion joints are then sealed and waterproofed with caulk/mastic sealant (flexible silicone based product) that matches the colour of the brickwork.
Brick Repairs specialise in retrofit installation of expansion joints, including mortar matched expansion-tie installation and caulking to seal. In this example, Brick Repairs installed expansion joints around a townhouse in Knoxfield.
I can highly recommend Brick Repairs as they did a neat job and helped us out under time critical circumstances.