Cracks in Brick Walls: When to Worry (Texas Foundation Guide)

Worry when cracks are wider than ¼ inch, grow over months, run horizontally through brick or block, appear as prominent stair-step patterns in mortar, or occur with sticking doors and sloping floors. On Ellis County clay, a cluster of symptoms matters more than a single hairline crack.

Hairline cracks in mortar or thin stairstep patterns can be seasonal on North Texas brick veneer — especially after drought or heavy rain. Monitor them; if they widen or pair with interior drywall cracks and door problems, schedule a foundation inspection.

Diagonal cracks at window or door corners often signal differential foundation movement — one section of the slab lifting or dropping more than another. On expansive clay, that usually warrants a professional elevation survey.

No. Some cracks are cosmetic or thermal. Structural concern rises when cracks are wide, active, horizontal, or combined with other settlement signs. A specialist can tell you whether you need piers, drainage, or monitoring.