Privacy fence repair in Ann Arbor for leaning posts, sagging gates and storm damage

Why a solid privacy fence fails differently from an open one

A chain link or split rail fence lets wind and snow pass through. A board-on-board or vinyl panel fence does not, so the force of a gust lands on the posts as leverage. The taller and more solid the fence, the more that leverage works the post back and forth in its hole, and over a few seasons the soil around it loosens.

Solid fences also hold moisture against themselves, and their weight works the gates hard. Knowing which force caused the damage tells the contractor whether a patch will hold or the failure will return next spring.

Rot at the ground line is the most common post failure

Wood posts almost never rot at the top. Decay concentrates in a narrow zone right around grade, where oxygen, moisture and fungi share the same few inches of wood. A post can look sound from the yard and be soft as cork right at grade. A screwdriver that sinks easily into the wood just below the dirt line tells the story.

A common culprit is the concrete collar that was poured flush with or below the soil and shaped like a bowl. Rain runs down the post, collects inside the collar and never drains away. Posts not rated for ground contact fail fastest, but even well-treated pine gives out if it sits wet year after year.

Frost heave and posts that creep up out of the ground

Washtenaw County clay holds water, and when a hard Michigan winter drives frost down into it, that wet soil expands and grips the sides of anything buried in it. If a post or its footing does not reach below the frost line, the freezing ground lifts it a little each winter and it rarely settles all the way back. Rails rack out of level and gates stop latching.

Footings wider at the top than the bottom make it worse. The lasting repair is to pull the heaved post and reset it in a hole that goes below the depth the frost reaches, with a footing that is straight-sided or flared at the base. The local building department for the address sets the depth a footing must reach, so the contractor should confirm it rather than guess. Wet low spots near the Huron River heave the most.

What a leaning section is telling you

A lean is a symptom, and the direction and pattern of the lean point to the cause.

• One post leaning while its neighbors stand plumb usually means rot or a broken footing at that single post.
• A whole run tipping the same way, away from the prevailing wind, points to shallow posts that have been rocked loose over several storms.
• A lean toward a slope or a downhill neighbor often comes from soil washing out around the footings after heavy rain.
• Sections that lean only in late winter and straighten partly in summer are a classic sign of frost movement rather than rot.

Sister, reset or replace: three ways to fix a bad post

Not every failed post has to come out. Depending on the condition of the wood and the footing, a contractor will usually choose one of three approaches, and a fair proposal explains which one was picked and why.

1. Sistering. A steel post mender or a short ground-contact post is driven beside the damaged post and bolted to it. It works when the post above grade is solid, but it is a bridge rather than a permanent cure.
2. Resetting. The post is dug out, plumbed and set again, either in new concrete or in compacted gravel that lets water drain. This suits a sound post that heaved or leaned because its footing was shallow or poorly shaped.
3. Replacing. The old post and footing are broken out and a new post goes in at the correct depth. Breaking out old concrete is a real cost driver.

Sagging and dragging gates on a solid fence

A privacy gate is heavy, and all of that weight hangs off one side. When the latch side drops and the gate starts scraping the ground, the hinge post is the first thing to check. If that post has loosened or leaned even slightly, no amount of hinge adjustment will hold; the post has to be reset or replaced.

If the post is solid, the frame is the problem. Wood gates need a diagonal brace that runs from the bottom hinge corner up to the top latch corner, and gates built with the brace reversed sag almost from day one. Cable and turnbuckle kits can pull a frame back into square. Vinyl gates rely on aluminum reinforcement inside the frame; when that is missing, the gate usually has to be rebuilt.

Broken rails, cracked pickets and loose boards

Horizontal rails carry the boards, and they fail where they meet the posts. Toe-nailed rail ends split, metal rail brackets rust through, and rails that sag in the middle let the whole panel bow. A rail can usually be replaced without touching the posts, as long as the posts are sound and plumb.

Individual pickets crack from impacts, from boards drying and cupping, or from fasteners that rusted and let go. New boards will not match weathered ones in color for a while. Fastener choice matters: hot-dipped galvanized or stainless screws hold far longer than bright nails, which streak and loosen in treated lumber. The wood privacy fences page covers how boards and finishes age, if a repair is turning into a question of material.

Wind and storm damage after a front moves through

Strong summer storms and heavy wet snow both take down privacy fences in this area, and the many mature trees on Ann Arbor lots add falling limbs to the picture. Either a section blows over because its posts were already weak, or something heavy lands on a healthy fence and crushes a panel or two.

The first kind is a warning about the rest of the run, because the posts that held this time may have the same hidden rot as the ones that broke. The second kind is often a cleaner repair limited to the damaged bays. Either way, take wide photos of the whole fence line and close photos of the broken posts at the ground before anything is moved.

Cracked vinyl, torn chain link and composite repair

Vinyl gets brittle in deep cold, and a hard hit from a snowblower or falling branch can crack a panel. Most vinyl systems allow a single picket, rail or panel to be swapped, but matching the exact profile and color from a discontinued line can be the hardest part of the job. The vinyl privacy fences page explains what separates a repairable system from one that is not.

Where a property has a stretch of chain link beside the privacy fence, stretched or torn mesh can be re-tensioned with a stretcher bar and come-along, and torn sections can be spliced or replaced. Composite boards can usually be replaced one at a time, though the steel or aluminum posts many systems use need their own inspection.

Temporary stabilization until the repair is scheduled

A fence that is leaning or partly down still matters, especially if it keeps a dog in the yard or blocks a view of a pool. These steps hold things together without making the permanent fix harder.

1. Clear away any fallen limbs or debris so the weight comes off the damaged section and nothing else gets crushed.
2. Brace leaning posts with a two-by-four run diagonally from the post to a stake driven into the ground, screwed rather than nailed so it comes off cleanly later.
3. Prop a dragging gate on a block so it is not swung on bent hinges, or tie it closed if it keeps a pet contained.
4. Do not pour fresh concrete around a broken post as a quick fix; it locks in the problem and adds demolition to the bill.

Repair or replace: how the decision usually gets made

There is no fixed rule, but contractors tend to weigh the same handful of questions. When the decision does tip toward a new fence, the privacy fence installation page covers the full project.

• How many posts are soft or loose? One or two bad posts in a long run is a repair; rot showing up at post after post means the rest are close behind.
• How old is the fence and what is it made of? Older untreated or poorly treated wood fails as a system rather than one piece at a time.
• Can matching material still be found, especially for vinyl and composite panels?
• Is the fence still in the right place and at the right height for current zoning and any homeowner association rules? Replacing a large section may trigger a fresh look at those rules, which the city, village or township sets.

What drives repair cost and what a repair proposal should list

Repair work is priced after the contractor sees it, because the real cost hides at the ground line. The main drivers are the number of posts that need resetting or replacing, how much old concrete has to be broken out, access for equipment through a side yard or over a slope, the material and whether it can be matched, gate hardware, and haul-away of debris.

A clear repair proposal names each post or section being fixed, the method for each one, the post type and footing approach, the fasteners and hardware, whether the MISS DIG 811 request is included, how debris is handled, and what workmanship coverage the contractor offers on the repair. Repairs are requested across the county, from older streets in Ypsilanti to rolling acreage in Chelsea; see all service areas, then send photos through the contact page.

Privacy fence repair in Ann Arbor for leaning posts — common questions

Related work

Across the metro