Fence panel wedges
Updated: 23 October 2026
A closeboard or lap panel that bangs against the post on a windy night is either a gap in a sound slot or a fence that is already failing. Fence panel wedges are for the first of those. Stop packing if the post, the gravel board, or the frame is the part that moves. The [Plastic wedges](/hub/diy-supplies/plastic-wedges) comparison ranks twelve packs, most of them furniture wedges. This page names the one fence-shaped file and does not re-score it. The amazon.co.uk files were checked on 21 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
A closeboard or lap panel that bangs against the post on a windy night is either a gap in a sound slot or a fence that is already failing. Fence panel wedges are for the first of those.
A closeboard or lap panel that bangs against the post on a windy night is either a gap in a sound slot or a fence that is already failing. Fence panel wedges are for the first of those. Stop packing if the post, the gravel board, or the frame is the part that moves. The Plastic wedges comparison ranks twelve packs, most of them furniture wedges. This page names the one fence-shaped file and does not re-score it. The amazon.co.uk files were checked on 21 October 2026. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Stated size | Job in the file | UK reviews | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  HongNuoEn HongNuoEn 50 mixed plastic wedges | 60 × 26 × 6 mm and 80 × 30 × 8 mm | Mixed short wedges | 4.8 from 6 | 7.5 | about £6.99 | View offer |
 n/a 10 black furniture wedges, stated 6 mm | 30 × 50 × 6 mm | Furniture wedge | 4.4 from 56 | 7.8 | about £4.59 | View offer | |
| Alternative |  GengHeXIN GengHeXIN 20 fence panel wedges | 82 × 20 × 15 mm | Fence slot | No star line | 2.4 | about £6.59 | View offer |
On this page
Find what is moving
The bang is a gap, or it is a failure, and the wedge only belongs in the gap. If the post rocks, or the concrete haunching is cracked, a wedge quiets the panel for an afternoon and leaves the lean. East Coast Fencing says to find what is moving before you hammer wedges in. Buy Fencing Direct treats a failed post as replacement, not packing.
A firm panel with a visible slot beside the post is the case a wedge can serve. Homebuilding lists wedges first for the rattle, then treats a moving post or a bowed panel as a replacement. Do not hammer wedges into rotten timber. Furniture stack height is a different task, on the how to level furniture with plastic wedges page.
Use a fence-sized wedge
A fence slot wants a piece about 80 mm to 90 mm long and around 15 mm thick, not a 6 mm furniture wedge. The short taper bottoms out before it fills a concrete slot.
The fence-shaped file is GengHeXIN B0H9WH4278: 20 black pieces stated at 82 × 20 × 15 mm, at £6.59. There is no star line. The unit count reads 1.0 count, and the pack weight is 20 g, which says nothing about strength. Bullets claim stacking, and also windows and tiles. No review confirms a concrete slot. Open the GengHeXIN 20-piece fence wedge and measure a piece on arrival. Wet gaps and timber are on plastic shims versus wooden shims.
How many, and how hard
Homebuilding often uses three or four wedges between the panel and the post. Country Living quotes fitters on the same three or four, a typical spend of about £5 to £10, and a habit of replacing wedges once a year because timber moves. That yearly line is a quoted opinion, not a British Standard. Both figures are practice, not a test of your fence.
Push by hand first. Tap only when your fingers are clear, because a panel can shut on them. The £6.59 bag of 20 sits inside that £5 to £10 spend if the pieces are the stated 82 mm, and the file has no review of that count in a concrete post.
When the wedge is the wrong spend
A wedge is the wrong spend when the post rocks, the haunching is cracked, or the panel is rotten. Metal clips, which Homebuilding and Country Living mention beside wedges, are not scored in this set. A clip can hold a sound post. It does not rescue a post that moves in the ground. A rotten gravel board is neither. Call a professional when the post rocks or several panels are rotten.
Common questions
Will a wedge stop a panel if the post moves?
No. A wedge fills a slot beside a sound panel. If the post rocks in the ground, or the concrete haunching is cracked, the panel will keep moving with the post. Homebuilding treats a moving post or a bowed panel as a replacement, not a packing job. East Coast Fencing says to find the moving part first. Hammering wedges into that bay hides the fault until the next windy night.
How many wedges do UK articles suggest per panel?
Homebuilding and the fitters quoted by Country Living often use three or four wedges between the panel and the post. Another trade note, outside this set, says about two for a normal gap and more for a large one. Treat both as practice, not as a standard and not as a test of your fence. Push by hand, tap only with your fingers clear, and add a piece only while that edge still rattles.
Is the once-a-year replacement a rule?
No. Country Living quotes fitters who replace wedges about once a year because timber moves. That is a habit in the article, not a British Standard interval. Look at the slot when the rattle returns, or when you are already walking the fence after a storm. Replace a wedge that has crushed or dropped out. Do not strip a quiet run on a date.
What size is the fence wedge in this set?
GengHeXIN B0H9WH4278 states 20 black pieces at 82 × 20 × 15 mm, priced at £6.59 in the file. There is no star line and no review of a concrete slot. The unit count reads 1.0 count, and the pack weight is 20 g, which says nothing about strength. Bullets mention stacking and also windows and tiles. Measure a piece when it arrives. A Woodside size near 90 × 23 × 17 mm is context from outside the set, not a ranked row.
Should you hammer the wedge?
Seat it with a hand push first. Tap only once it is in place and your fingers are out of the gap, because a panel can close on them. Do not hammer a wedge into rotten timber. The soft wood crushes and the rattle comes back as a split. If the post moves while you tap, stop. The moving part is the post, and another blow will not fix the ground.
Are metal clips the same product?
No. Metal and spring clips are a different fixing. UK articles mention them beside wedges, and they are not scored in this twelve-pack set. A clip suits a sound post with a point it can grip. A wedge suits a rattle in a firm slot. Neither repairs rot, a lean, or a post in failed concrete. Choose after you have found what is moving, and call a fencer when the fault is in the ground.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 21 October 2026. Updated 23 October 2026.
- GGF installation guide, section 3.12 (retrieved 21 October 2026)
- BS 8213-4:2016 windows and doorsets (retrieved 21 October 2026)
- BS 6262:1982 glazing code (retrieved 21 October 2026)
- General Product Safety Regulations 2005 (retrieved 21 October 2026)
- Consumer Rights Act 2015, section 11 (retrieved 21 October 2026)
- Fix Direct: how glazing packers are used (retrieved 21 October 2026)
- Homebuilding: stop fence panels rattling (retrieved 21 October 2026)
- Beko UK: how to level a washing machine (retrieved 21 October 2026)