In Indiana, the frost line is the level at which groundwater freezes in the winter. Indiana’s frost line depth ranges from 30 to 60 inches, with 30 inches in the southern portion of the state and 60 inches in the northern portion.
Depending on the local authority, the frost line may be referred to as the frost depth or the freezing depth. Homeowners, contractors, and other service workers must be aware of the frost line. This is because water pipes, decking supports, and other components must extend beyond the frost level for compliance.
This is particularly crucial for water lines. Water lines will freeze when the earth freezes. As the ice spreads, the water line may break or crack, causing homeowners and business owners a headache.
The frost line varies depending on location and height in Indiana. This is why it is essential to have a frost line map that depicts the frost line depth across the state. A small region of the northern side of the state experiences frost depths between 48 and 54 inches. In the southern region of Indiana, depths range from 30 inches at the state’s extreme southern boundaries to 54 inches near the state’s geographic centre.