Stair-Step Cracks in Brickwork – Are They a Sign of Subsidence? Stair-step cracks in brickwork are one of the most recognisable crack patterns in UK homes. These cracks follow the mortar joints in a stepped or zig-zag pattern and are often found on external walls. While some stair-step cracks are minor and caused by natural … Continue reading Stair-Step Cracks in Brickwork – Are They a Sign of Subsidence?