Small hairline cracks in plaster are common and sometimes harmless, but their location matters. Cracks radiating from the corners of doors and windows, or those that widen over time, can indicate that the building has moved or is under stress.
Doors and windows are natural weak spots in walls. If the structure is settling unevenly, these areas often show it first. A few stable, thin cracks might just be normal settling. But wider, diagonal, or repeatedly repaired cracks could point to deeper issues with foundations, load-bearing elements or water damage.
You don’t need to panic at every line, but noticing patterns and asking an expert when in doubt is wise.
It’s another layer of information when deciding how sound a building feels before you commit money and years of your life to it.
