# Frost Heave Deck Repair: Medford, OR Footing Fix > A Medford deck lifted and racked after the first hard freeze. We found shallow footings — and fixed them right. Free estimate. Call today. Medford Deck Building Pros | deck building | Medford, OR ## The Call: A Corner That Lifted Overnight A homeowner in the northeast Medford foothills noticed something unsettling the morning after the season's first hard freeze. The far corner of their deck had visibly risen — not dramatically, but enough to throw the railing noticeably out of plumb and leave an uneven surface underfoot. One board rocked. The post looked tilted. Their first thought was that a post had cracked or that the wood had finally given out after a few winters. They called us expecting bad news about rotted lumber. What we found was a different story entirely — and one that's far more common on hillside properties in Southern Oregon than most homeowners realize. Up in the foothills northeast of town, temperatures regularly drop several degrees colder than the valley floor. That elevation difference matters more than people expect. A night that registers 34°F downtown can hit 26°F or colder on a hillside, and sustained freezing temperatures are what trigger the problem this deck had been quietly building toward for years. --- ## What We Found On Site: A Textbook Frost Heave Failure We started with a full visual inspection before touching anything. The railing was out of plumb by several inches at the affected corner. The decking surface had a noticeable pitch that wasn't there by design. When we checked the post, the wood itself was sound — no rot, no split, no structural failure in the lumber at all. The problem was underground. We excavated around the base of the affected post and measured the existing concrete footing. It had been poured at roughly 12 inches deep. For many parts of the country, that might be adequate. For Medford's climate — and especially for a hillside property where cold air pools and hard freezes are more sustained — that depth falls well short of what's needed to get below the frost line. Here's what happens when a footing is too shallow: when the ground freezes, soil moisture turns to ice and expands. That expansion exerts upward pressure on anything embedded in it — including concrete footings. The footing rises with the frost. The post rises with the footing. And the entire deck corner lifts with the post. When the ground thaws, things settle back — but rarely to exactly where they started. Do this over two or three winters and you end up with a deck that racks a little more each year, hardware under stress it wasn't designed for, and a railing that's slowly going from cosmetic concern to safety issue. This is a **frost heave deck repair** scenario, and it's one of the most common reasons we get called out to Southern Oregon decks that have gone out of level after winter. The deck isn't failing. The footing depth is. We also checked the remaining footings while we were on site. The rest of the deck had been poured at similar depths — a sign that whoever built it either didn't pull a permit or didn't account for local frost conditions. No judgment on the previous owners; this kind of thing happens constantly with older decks or work done without a formal scope of work and inspection. --- ## How We Fixed It: Shore, Excavate, Pour, Re-Plumb Before any digging, we gave the homeowner a free estimate with a clear scope of work — no surprises, no hidden haul-off fees tacked on at the end. **Step one: temporary shoring.** We supported the affected corner of the deck so the structure was stable and the remaining framing wasn't under lateral stress during the repair. This protects the ledger connection, the beam, and the joists while the post and footing are removed. **Step two: full excavation and footing removal.** We dug out the undersized concrete footing completely. Partial fixes — grinding it down, pouring on top of it — don't solve the problem. The new footing needs to go in clean, at the correct depth, with proper sub-grade prep. **Step three: new tube footings at the correct frost depth.** We formed and poured new concrete tube footings sized and positioned for Medford's frost conditions. Getting this depth right is the whole ballgame. A footing that terminates below the frost line doesn't move when the ground freezes above it — the frost heave pressure acts on the soil, not on the footing. **Step four: re-plumb, re-level, inspect hardware.** Once the new footings cured, we set the post, re-plumbed it, and re-leveled the beam. Then we inspected every piece of structural hardware in the affected corner — joist hangers, post bases, beam connectors — for stress damage from the repeated heaving cycles. A couple of connectors had deformed enough to warrant replacement. Everything else checked out. The deck was returned to service level, solid, and with a railing that was plumb again. The homeowner said it felt more stable than it had since they moved in. --- ## What to Watch For: Your Deck Might Be Telling You Something If your deck was built by a previous owner, or by a contractor who didn't pull a permit, you may have no idea how deep those footings actually go. That's not a reason to panic — but it is a reason to pay attention after your first hard freeze each winter. Watch for these signs that a **frost heave deck repair** conversation might be worth having: - **A corner or edge that rises slightly after a freeze and doesn't fully come back.** This is the classic tell. It's subtle at first. - **Railing posts that are out of plumb** when they were fine the season before. - **Decking boards that rock or feel uneven** in a section that used to be flat. - **Visible gaps opening up** between the deck and the house at the ledger, or between boards that used to be tight. - **Stiff or binding gates** on a deck staircase — the frame has racked enough to bind the hinge. Properties at higher elevation around Medford — the foothills to the northeast, the neighborhoods that climb toward the Cascades — are especially worth watching. The temperature differential is real, and shallow footings that survive just fine on the valley floor can fail repeatedly up the hill. A deck that rocks or goes out of level after winter is almost always a footing story, not a post story. The lumber gets blamed. The footings are the culprit. If you're buying a home with an existing deck, it's worth asking whether permits were pulled and inspections signed off. If that paperwork doesn't exist, a quick look at footing depth during a pre-purchase inspection can save you from inheriting a **frost heave deck repair** bill in year two. We're licensed, bonded, and insured in Oregon. Every quote comes with a written scope of work before we break ground. --- *Names and details are illustrative; the problem and fix reflect real jobs we do.* If your deck shifted this winter and you're not sure why, we're happy to take a look. Call us at {{phone}} to schedule a free estimate — we'll tell you exactly what's going on before anyone picks up a shovel. --- Canonical URL: https://deckbuildingmedford.com/pages/frozen-ground-cracked-concrete-and-a-rogue-valley-deck-that-wouldn-t-stop-shifti