Finding a crack in your home’s walls can be unsettling. If you’ve noticed a horizontal crack running directly beneath a window sill , you’re right to pay attention. While not always a sign of structural disaster, this specific type of crack has common causes ranging from harmless settling to issues that need repair.
When in doubt, get a local pro to look. The $150–300 inspection fee is cheap peace of mind. Disclaimer: This information is for educational purposes. Always consult a licensed professional for structural concerns. horizontal crack under window sill