If one fence panel has cracked, blown down or started to rot, you can often replace that panel without rebuilding the whole fence. The job is usually straightforward when the posts are sound and the replacement is the correct size. Before buying anything, inspect the fence carefully, measure the gap and identify how the existing panel is held in place.

This guide explains how to replace fence panel sections between timber or concrete posts. K C Fencing and Timber Ltd supplies the materials for the job but does not provide a fitting or installation service.

Check the posts before replacing the panel

A new panel will only be as secure as the posts supporting it. Push each post gently at about shoulder height. It should remain firm without rocking noticeably at ground level. Look for cracks, leaning or movement.

With timber posts, use a screwdriver to check the wood near ground level. If it sinks easily into soft or crumbling timber, the post may be rotten. Check the areas around screws and brackets as well.

Concrete posts are not affected by rot, but they can crack or become loose in their foundations. Small surface marks are not always serious, while a deep crack running through the post can weaken it. If a post leans, the gap may also be narrower at one end than the other.

Do not force a new panel between damaged or badly leaning posts. Repairing the supporting structure is a separate job and may require professional help. You can find suitable replacement concrete posts and related materials from K C Fencing and Timber Ltd.

Tools and materials you may need

Your exact list depends on the post type and the condition of the old panel. For a typical replacement, you may need:

A tape measure
A spirit level
Work gloves and safety glasses
A screwdriver or drill-driver with suitable bits
A pry bar or claw hammer
Exterior-grade screws or panel clips
Timber battens or packing pieces where required
A handsaw if a timber panel needs careful adjustment
A helper to support and lift the panel
A stable platform if you cannot work comfortably from ground level

Fence panels can be heavy, awkward and vulnerable to gusts of wind. Never try to control a full-sized panel alone in windy conditions. Keep children and pets away from the working area, and check both sides of the fence before removing fixings.

How to measure the fence gap

Measure the clear horizontal distance between the inner faces of the two posts. Take three measurements: one near the top, one across the middle and one near the bottom. Do not assume the gap is perfectly square, even if the fence looks straight.

Use the smallest measurement as your main guide. A panel that fits the widest part may jam before it reaches its final position. Allow a small amount of clearance so the panel can be positioned without being hammered or forced. The suitable clearance depends on the post system and fixing method, so give the supplier all three measurements if you are unsure.

Next, measure the required height. Measure from the top of the gravel board, base panel or intended lower edge to the desired top of the fence. Do not measure only the broken panel because it may have swollen, sagged or been cut incorrectly.

Write down the width and height separately and note whether the measurements are in millimetres or centimetres. Photographing the posts, fixings and panel style can also help when you visit the yard. For an initial materials estimate across a longer run, you can use our fence calculator.

Choose the correct replacement panel

Match the construction as well as the overall appearance. Common choices include overlap panels, closeboard panels and decorative designs. Check which face is intended to be visible and whether nearby panels have a cap fitted along the top.

Standard sizes can vary by manufacturer, and an older fence may not match a current nominal size exactly. Timber also expands and contracts as moisture levels change. Bring accurate gap measurements rather than asking for a panel based only on its approximate height.

If your fence uses slotted concrete posts, the panel normally slides into the channels. With timber posts, it may be attached using screws, clips or battens. Browse our range of fence panels, or speak to K C Fencing and Timber Ltd for help selecting a suitable product.

Remove the broken panel safely

Between timber posts

Ask your helper to steady the panel while you remove screws, clips or battens. Work from one side at a time but keep the panel supported throughout. If fixings are rusted, do not pull so hard that you split the post. Remove loose pieces carefully and watch for protruding nails.

If the panel is already badly broken, dismantling it in smaller sections may be safer than lifting it whole. Wear gloves and eye protection because dry timber can splinter unexpectedly.

Between slotted concrete posts

Panels usually need to be lifted vertically until the bottom clears the gravel board or post channel. This can require considerable height and safe access. Never stand on a loose chair, upturned bucket or gravel board.

If overhead branches, a building or another obstruction prevents a safe vertical lift, do not improvise. It may be safer to dismantle the damaged timber panel carefully or ask an experienced fencing contractor to carry out the work.

Fit the new fence panel

Fitting between concrete posts

With one person at each end, lift the panel evenly and guide its edges into the post slots. Lower it slowly, keeping fingers away from the channels and the bottom edge. The panel should sit level on the gravel board or other intended support. Do not drop it, as this can damage the panel and concrete products.

Use a spirit level to check the top. If the gap is uneven, ask your merchant about appropriate packing rather than wedging in unsuitable scraps that may trap water or work loose.

Fitting to timber posts

Position the panel at the correct height and support it on temporary blocks. Check that it is level, then attach it using suitable exterior-grade fixings, clips or battens. Pre-drilling near timber edges can reduce splitting.

Fix into solid timber and follow the fixing guidance for the panel. Avoid driving screws too deeply, as this can crush the timber and weaken the connection. Before removing the temporary supports, confirm that every fixing is secure.

Finish the job and maintain the fence

Collect old nails, screws and broken timber from both sides of the boundary. Check that the replacement panel does not touch soil, as constant damp encourages decay. A suitable gravel board helps separate timber from the ground; K C Fencing and Timber Ltd supplies both timber options and gravel boards.

If the panel is supplied pressure treated, ask whether any cut edges need an approved end-grain treatment. Do not paint or stain damp timber. Allow it to dry as directed by the coating manufacturer, and use a product intended for exterior fencing.

Inspect the fence after strong winds and at least once a year. Tighten loose fixings, clear vegetation away and deal with post movement early. Prompt maintenance can prevent one damaged section from placing extra strain on neighbouring panels.

Order your replacement fencing materials

K C Fencing and Timber Ltd manufactures and supplies fencing materials to trade and DIY customers across the West Midlands, with delivery available and free collection from our Wednesbury yard at 83 Portway Road, Wednesbury WS10 7DZ.

For help choosing the right panel and materials, call 01902 288162 or request a quote. Have your three gap measurements, required height, post type and photographs ready so we can advise you more accurately.

How to Replace a Single Broken Fence Panel