Stabilise loose panels and heavy gates first
Stop work if a fence could fall onto people, vehicles or a public area. Check for buried services before digging around posts.
MOST LIKELY CAUSES
Start with posts, fixings and alignment
Unsealed timber
Bare edges absorb water quickly.
Failed paint or stain
Weather protection has broken down.
Poor drainage
The lower edge stays wet.
Insufficient clearance
Normal seasonal expansion has nowhere to go.
Symptom variations Match the movement, lean or latching pattern. ⌄
- Gate sticks after rain
- Latch becomes tight
- Bottom edge looks dark
- Paint peels
- Gate works again in dry weather
Quick checks Safe checks before dismantling the fence or gate. ⌄
- Inspect top, bottom and cut edges.
- Check for standing water or soil contact.
- Measure where the gate binds.
- Assess coating condition.
- Allow time to dry before trimming.
Important:
Correct failed posts and structure before adjusting panels, hinges or latches.
Step 1 — Stop the moisture source Make the smallest safe correction and retest. ⌄
Improve drainage and repair coatings.
Step 2 — Let the gate stabilise Make the smallest safe correction and retest. ⌄
Avoid trimming while fully swollen.
Step 3 — Ease and reseal if necessary Make the smallest safe correction and retest. ⌄
Remove the minimum amount and seal all exposed timber.
Why the problem happens How wind, weight, moisture and fixings affect the structure. ⌄
Timber expands across the grain as moisture content rises. Premature trimming can leave a large gap later.
Advanced checks Further diagnosis for persistent outdoor faults. ⌄
- Use a moisture meter.
- Inspect end grain.
- Check frame joints.
- Assess ground clearance.
- Review post movement.
Tools and information needed Useful items for accurate checks. ⌄
- Moisture meter
- Plane or sandpaper
- Paintbrush
- Wood sealer
- Screwdrivers
Parts that may need replacing Common fencing and gate components linked to this fault. ⌄
- Exterior sealer
- Primer and paint
- Hinges
- Latch
- Replacement timber
When to call a professional Conditions that should end basic DIY diagnosis. ⌄
- Timber is rotten.
- The gate is very large.
- The frame joints have failed.
- Major reshaping is needed.
- The gate is part of security access.
Frequently asked questions Common fence and gate questions. ⌄
Should I plane it immediately?
Usually no. Dry it and fix the moisture source first.
Why seal the bottom edge?
End grain absorbs water quickly.
Will it shrink again?
Often yes once the timber dries.