How to Inspect Your Fence

A fence seems like a permanent feature until it isn’t. Posts rot at ground level, boards loosen from their rails, and before you know it, a windstorm takes down an entire section. The deterioration happens slowly, invisibly, until it becomes a sudden problem. Annual inspection catches issues while they’re still manageable.

Why This Matters

Fences represent a significant investment:

• Replacement cost: A new wood fence costs thousands
• Property value: A falling fence hurts curb appeal
• Security: A compromised fence doesn’t keep things in or out
• Safety: Falling sections can injure people or damage property
• Neighbor relations: A leaning fence is everyone’s problem

Regular inspection and maintenance extends fence life significantly—often by years.

How Fences Fail

Post Failure

Posts are the structural foundation. They fail first:

• Ground contact rot: Wood in contact with soil decays
• Moisture wicking: Concrete bases hold water against wood
• Insect damage: Termites and carpenter ants attack posts
• Wind stress: Repeated loading loosens posts

When posts fail, the entire fence leans or falls.

Rail Deterioration

Horizontal rails that support the vertical boards:

• End rot: Where rails meet posts
• Checking and splitting: Surface cracks that deepen
• Loose fasteners: Nails back out over time

Failed rails mean boards have nothing to attach to.

Board Damage

The vertical boards or pickets:

• Bottom rot: Contact with soil or splash-back from rain
• Warping: Boards twist and cup
• Cracking: Age and sun damage
• Missing boards: Blow off or fall out

Gate Problems

Gates get the most use and wear:

• Sagging: Hinges loosen, posts lean
• Latching issues: Alignment problems
• Hinge failure: Rust, loose screws, wood rot

Step-by-Step Inspection

Step 1: Walk the Perimeter

1. Start at one end of the fence
2. Walk the entire length slowly
3. Look at each section from both sides if possible
4. Note anything that looks wrong

Step 2: Check Every Post

This is the most important part:

1. Push on each post – Should not move
2. Look for leaning – Posts should be plumb (vertical)
3. Probe at ground level – Use your screwdriver at the base
4. Check where post meets concrete – Common rot point
5. Look for insect damage – Small holes, sawdust, mud tubes

If the screwdriver goes into the wood easily, the post is rotting.

Step 3: Inspect Rails

1. Check each horizontal rail along its length
2. Look for sagging or bowing
3. Probe at ends where they meet posts
4. Wiggle rails—they shouldn’t move
5. Check fasteners for rust or backing out

Step 4: Examine Boards

1. Look for rot at the bottom of boards
2. Check for warping, cupping, or splitting
3. Note any missing or loose boards
4. Push on boards to check attachment

Step 5: Test the Gates

1. Open and close each gate
2. Check for sagging or dragging
3. Test the latch
4. Grab the gate frame and wiggle
5. Look at hinge attachment points

Step 6: Look for Drainage Issues

1. Soil or mulch piled against fence boards?
2. Water pooling near posts?
3. Sprinklers hitting the fence regularly?
4. Vegetation growing on or against the fence?

Moisture is the enemy. Any condition that keeps wood wet accelerates decay.

The Screwdriver Test

Your most valuable tool for fence inspection:

1. Press the tip into wood at suspected rot points
2. Solid wood resists penetration
3. Rotting wood is soft and easily penetrated
4. Check at post bases, rail ends, board bottoms

Do this at multiple points along the fence.

Common Problems and Fixes

Leaning Posts

• Caused by rot, loose soil, or wind damage
• If rot is present, post needs replacement
• If soil is loose, may need concrete reinforcement

Sagging Rails

• Can be reinforced with additional fasteners or blocks
• If rails are rotted, they need replacement

Rotted Board Bottoms

• Individual boards can be replaced
• Consider trimming all boards to be 2 inches above soil level

Gate Sagging

• Often caused by post leaning or hinge failure
• May need post repair, new hinges, or gate frame reinforcement

Maintenance That Extends Life

• Keep clearance: Boards shouldn’t touch soil or mulch
• Control vegetation: Don’t let plants grow against the fence
• Seal or stain: Every 2-3 years to protect from moisture
• Fix problems promptly: Small issues become big ones
• Redirect sprinklers: Keep water off the fence

DIY vs. Call a Pro

DIY: Inspection, replacing individual boards, tightening fasteners, staining/sealing, gate hardware replacement.

Call a pro: Post replacement, section replacement, major structural repairs, or new fence installation. Find a fencing contractor →

How Often to Inspect

• Full inspection: Once a year
• After major storms: Check for damage
• Before staining: Assess condition
• When you notice movement: Address immediately

The Bottom Line

Fences rot from the bottom up and the inside out. By the time a fence falls over, the damage has been developing for years. Spend thirty minutes once a year walking the line, poking posts, and fixing small problems. Your fence will last years longer, and you won’t be replacing sections after every windstorm.