Masonry
How diagonal cracking follows bed joints and why photos alone rarely explain Philadelphia rowhome masonry movement.
Cracks follow the path of least resistance
Brick walls often crack along mortar joints because the joint is weaker than the unit. A stair-step pattern can point toward settlement, lintel movement, moisture expansion, or nearby structural changes.
What to document before patching
Photos are useful, but timing and location matter. Track whether the crack changes after storms, appears near openings, or lines up with interior movement.
- Measure crack width in the same spots over time.
- Check windows, doors, and floors for related movement.
- Look for water sources near the crack path.
When to slow down
If cracks are widening, displaced, recurring after repair, or paired with bowing walls, get qualified on-site guidance before cosmetic patching hides the evidence.
Related Guides
FAQ
Are stair-step cracks always serious?
Not always, but they deserve context. Movement, displacement, water entry, or repeated growth raises the concern level.
Can repointing fix stair-step cracks?
Repointing can close failed joints, but it does not solve settlement, lintel movement, or drainage problems by itself.
