When to replace fence panels vs when to repair them

The threshold that matters

Homeowners usually know something is wrong with the fence but not whether it is a repair, a partial rebuild, or a full replacement. The honest threshold is this - if the count of failures on a 10-panel run is three or more, you are past repair economics. Below that, individual panel or post replacement usually wins on cost. Above that, every fix you pay for is buying six months and the money is better on a proper rebuild.

The five signs a panel is done

1. Board rot to touch. Push a fingernail into the timber. If it dents past the surface, the panel is porous and no longer weather-resistant.
2. Split at the fixings. The nail or screw is still there but the wood around it has split. The fixing is not holding load any more.
3. Cupped or twisted face. Panel no longer sits flat in the slot - it has warped enough that either the fixing or the concrete post takes stress on every gust.
4. Gravel board rot below. If your gravel board is timber, not concrete, and its base is going soft - the panel above is drawing water up and will fail next.
5. Visible daylight through the boards. On lap and overlap panels, if you can see through the middle of the panel, the overlaps have shrunk out of contact and there is nothing sealing the fence.

What actually is repairable

Not the panel body. The panel body is a manufactured item and once it is failing you replace it. What is repairable is the posts and the gravel boards. A concrete post outlives the panels on it two or three times. A timber post that is showing surface rot can often take a concrete spur repair and hold another five to eight years. Both of those repairs are far cheaper than a full rebuild.

The economics of "just one panel"

A single-panel replacement on an existing concrete-post fence is £70-£130 supply-and-fit in Sandwich, and it takes an hour on site. If you have one panel down and the other nine are visibly in the top third of their life, that is a straight repair. If you have one panel down and three others are showing the "signs a panel is done" list above, you are staring at four repairs inside 18 months. At that point the rebuild pays for itself in labour visits alone.

Replace vs rebuild - the honest split

• Replace panels only when the concrete posts and gravel boards are in good order. This is the cheap path and it can carry a fence another 15 years.
• Replace posts only when the panels are good but the timber posts are done. Timber-to-concrete post upgrade is £45-£70 per linear metre, panels rehung on the same day.
• Full rebuild when both posts and panels are showing failure, or when the fence never was the right spec for the wind exposure (lap panels on Sandwich Bay boundaries, timber posts on the marsh side). Full closeboard on concrete posts is £85-£110 per linear metre and it is what should have been there from the start.

Sandwich-specific consideration

On the marsh side of town and on Sandwich Bay boundaries, the "replace panels only" path is a false economy if the existing posts are timber. New panels going onto old timber posts will be down again inside three winters because the post base is the failure point. If you're doing the work, do the posts too. It is the cheaper total over ten years.

What to send us for a repair-or-replace quote

Two photos. One down the length of the fence, one close-up of the worst-looking panel or post base. Postcode. Rough length in panels or metres. That is enough for an honest same-day call on which path fits.