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When mortar between masonry begins to crack and fail, tuckpointing is needed. Tuckpointing is the process of removing old, failed mortar from the structure and replacing it with new mortar that matches the needs of the building.

Why Does Mortar Fail?

Freezing water is the most common cause of mortar failure in masonry walls. When mortar ages and begins to fail, water fills in the tiny cracks that form, and when it freezes, it expands forcing the cracks to grow. As the process advances, growing cracks can join and cause crumbling sections of mortar to fall from the wall, threatening severe water infiltration issues as pathways to the building interior grow and expand.

How Do I Pick the Right Mortar to Replace Failed Mortar?

Correct mortar selection is critical to a successful and long lasting repair. Mortar needs to have less compressive strength than the masonry units it surrounds, so the mortar can relieve built-up pressures in the wall, so the masonry remains intact. Mortar should also be designed to be strong enough to stand the test of time. Selecting the best mortar composition for a wall involves testing the old mortar to allow it to be recreated.


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