A paver patio in Jackson Hole is not sitting at the mercy of one hard winter. It is sitting at the mercy of thirty or forty freeze-thaw cycles a year. At 6,200 feet the temperature crosses the freezing point more often than lower elevations, which means water in the joints and under the base expands, contracts, and works the pavers loose in ways that a single hard freeze would not.
What the freeze-thaw cycle actually does
Water is incompressible when it freezes. A small amount of water in a joint or under a paver expands roughly nine percent when it turns to ice. Do that forty times a year and the joint sand migrates, the base shifts incrementally, and pavers that were flush start to rock. This is not a defect. It is physics, and it happens to every patio regardless of who installed it. The question is how slowly.
What protects a paver surface over time
- Polymeric joint sand. Regular sand washes and blows out over a few seasons. Polymeric sand sets firm, limits how much water penetrates the joint, and stays put through freeze-thaw. Replacing the joint sand every few years is the single highest-leverage maintenance you can do.
- Sealing. A penetrating sealer does not make the surface look wet or plasticky. It reduces how much water the pavers themselves absorb, which is where most of the freeze damage originates. Every two to three years is the general rule.
- Keeping the base drainage working. A patio installed with proper drainage is protected by design. If water is pooling on or near the surface after a storm, the drainage is not working and it is working on the base.
- Clearing snow without damaging the surface. A metal blade drags across pavers and scores them. Use a rubber edge on any plow or pusher on finished paver surfaces.
What never to use on a paver surface
Rock salt (sodium chloride) is the default de-icer and the wrong choice on pavers. It accelerates the freeze-thaw damage by drawing moisture into the surface and lowering the point at which that moisture cycles. It also breaks down the sealer and discolors the paver face over time. For a surface you spent serious money on, sand for traction or calcium chloride sparingly is the right call. Avoid rock salt entirely.
When to call for a repair versus a rebuild
A rocking paver or two, or a section where the joint sand has washed away, is a repair. Reset the pavers, compact the base, refill the joints with polymeric sand, and the surface is right again. A section that has shifted in a pattern, where multiple pavers are out of plane or there is a drainage problem at the root, is a base issue. Resetting pavers on a base that has failed buys one season before it is back.
We install and maintain paver surfaces across Jackson, Wilson, Teton Village, and Hoback. If your patio went into last winter with rocking pavers or is coming out of it looking different than it went in, let us take a look before next season starts.