Frost Depth & Snow Load in Wisconsin (2026)

2 rules on the books across Wisconsin. Select a rule to read the full details.

Severity: Few Restrictions · Light Restrictions · Some Restrictions · Significant Restrictions · Heavy Restrictions

Frost Line Depth

How deep footings must go below finished grade to sit under the frost line, as adopted locally in IRC Table R301.2 or an amendment to R403.1.4.

Wisconsin requires footings and foundations to sit below the frost penetration level or at least 48 inches below…

The minimum roof or flat-roof design snow load (Pf), a different quantity from ground snow load, where the jurisdiction adopts its own figure.

Wisconsin's dwelling code sets minimum roof snow loads from a state zone map and does not state a ground snow load at…