Spalling is when brick masonry begins to deteriorate to the point chunks of brick are falling from the structure. Spalling starts off as small cracks
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Why Do Bricks Crumble (Spall) and is it Dangerous? - Building Advice
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10 Signs Your Brick Wall Needs Repair - BRICK POINTING NYC
Understanding the Causes of Crumbling Brick - and How to Fix It
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Healthy Exterior Walls RAND Engineering Architecture, DPC