frost footings: Frost Heaved Decks and How to Avoid Them
- 06/05/13 07:51 PM
One of the most common problems with decks in Minnesota is frost heave. Today I’ll explain how this works, why it matters, and what steps can be taken to help prevent damage from frost heave when building a deck. How Frost Heave Works When expansive soils freeze and expand, the earth rises. Wikipedia has a nice illustration of how this works, shown below.
How much can soils heave? It depends. I once lived in a townhouse in Saint Louis Park with a patio that would heave about 4” during the winter; it got so bad that I could barely open … (15 comments)
One of the most common problems with decks in Minnesota is frost heave. Today I’ll explain how this works, why it matters, and what steps can be taken to help prevent damage from frost heave when building a deck.
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