TL;DR
A frost footing is a deck or porch foundation poured to extend below the frost line — typically a 8- to 12-inch diameter pier with a flared base or a poured pad and pier — so freezing soil grips and lifts the structure's supports no more in January than July. Deck builders size them to tributary load and bell the bottoms where soils are weak, setting post bases on top to keep wood above grade.
What it means
A frost footing is a deck or porch foundation poured to extend below the frost line — typically a 8- to 12-inch diameter pier with a flared base or a poured pad and pier — so freezing soil grips and lifts the structure's supports no more in January than July. Deck builders size them to tributary load and bell the bottoms where soils are weak, setting post bases on top to keep wood above grade. Inspectors measure the open hole before the pour; a deck on shallow footings telegraphs its problem as railings and stairs that shift seasonally against the house.
Where it sits in the glossary
Frost footing is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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