What Causes Plaster To Crack !new! Jun 2026

All buildings move slightly as they age. In the first few years after a house is built, the foundation settles into the soil. This movement creates stress on the rigid plaster, resulting in hairline cracks —often vertical or diagonal (stair-stepping along brickwork).

Almost all houses settle into the soil. This creates diagonal or "stair-step" cracks, especially near the corners of doors and windows where stress is highest. what causes plaster to crack

The most common cause of cracking in new and old homes alike is "settlement." When a house is built, the foundation and the framing lumber contain moisture. Over the first few years of a home's life, the wood dries out and shrinks, and the foundation settles slightly into the ground. This process causes the frame of the house to shift minutely. All buildings move slightly as they age

Because plaster is a rigid, brittle material, it does not flex well. When the wood behind it shrinks or the foundation drops a fraction of an inch, the plaster is forced to move, resulting in cracks. These are typically "hairline" cracks—very thin and shallow. They are often considered a cosmetic issue rather than a structural threat. Almost all houses settle into the soil