How to fix a leaning fence, and when not to bother

Why a straight fence starts to lean

Nearly every leaning fence in this metro traces back to one of three forces, and often two of them working together.

Rot at the ground line. Wood posts fail where wood, water, and air all meet: right at grade. Nine wet months keep that zone damp from November into spring, so a post that looks fine at eye level can be soft two inches below the soil. Footings poured too shallow, or finished flat so water pools against the post, speed the process up.

Wind. A 6 foot solid panel is a sail with one edge nailed down, and every gust levers against the post at the exact spot rot has weakened. The east-wind corridor around Troutdale and Gresham sees this more than anywhere else we work.

Soil. Clay-heavy ground swells when wet and shrinks when dry, working footings a little looser every year until the fence follows.

The push test: posts or panels?

Before anyone quotes you a repair, spend five minutes on this check. Grab each post near the top, push firmly toward the neighbor's yard, then pull back. Watch the ground line, not the top of the fence.

If the post pivots at the soil, the post or its footing has failed, and no amount of panel work will cure the lean. If the post stands rigid while the panel flexes, sags, or rattles, the trouble lives in the rails and fasteners, which is a shorter and cheaper conversation. Tie a strip of tape on every post that moves and count them. That count decides everything in the rest of this guide.

One more check: press a screwdriver into each post at grade. If the tip sinks in without effort, that post is on its way out even if it passed the push today.

Repairs that hold, and the props that don't

Only a few fixes address the true failure, which is a post that no longer grips the ground.

• Full post reset. Pull the failed post and its old footing, set a new post in fresh concrete below the rot line, and crown the pour so water sheds away. The standard fix, and built right it outlasts the boards.
• Sister post. A new post in its own concrete, set tight against the failed one and through-bolted. The move when the old footing can't come out without wrecking a patio, a retaining wall, or tree roots.
• Steel post retrofit. Swap failed wood posts for galvanized steel set in concrete and keep your wood panels. It costs more per post, never rots, and is the strongest answer in the wind corridor.

What doesn't work: diagonal 2x4 props, driven metal stakes strapped to the post, and gravel packed around a loose footing. Each one holds until the next storm finds the same rot. Our wood fence repair crews pull a lot of failed props before starting the real fix.

Repair or replace: the honest count

Posts are the skeleton of a fence; boards and rails are the skin. Skin is cheap to patch, skeletons are not, so the tape count from your push test is the whole decision.

If fewer than a third of your posts are failing and the boards still have life, repair is the smart money, and the fixed sections will match the rest of the fence in a season. If a third or more are going, stop. The remaining posts went in the same year, in the same soil, from the same lumber batch, and each windstorm will expose the next weakest one. At that point repairs become a subscription, and replacement wins over any five year window. Our fence cost guide covers what drives the replacement number. Either way, we put both figures in writing and let you do the math.

After a windstorm

Three notes for the morning you find the fence on the lawn. First, photograph everything before you move a single board. Many homeowner policies cover wind damage to fences, and adjusters want to see the fence as the wind left it. We write itemized repair estimates that adjusters can work from.

Second, a fence that went over in one storm rarely died that night. Wind finds rot that was already there, so have the standing sections push-tested before you pay to fix only the fallen ones. Third, if the fence sits on a shared line, talk to the neighbor before work starts; splitting a repair is a far easier conversation than surprising them with a bill. Estimates are free on both sides of the river, and we are licensed in Oregon and Washington.