Timber fences rot primarily due to moisture exposure, particularly at ground level where the wood is in constant contact with wet soil. Rain, frost, poor drainage and splashing from flowerbeds all contribute to long-term decay. Over time, even pressure-treated timber can weaken if it remains damp for long periods.

The most effective way to prevent rot is to install gravel boards. These lift the panels away from the soil, protecting the bottom edge where rot begins. Concrete gravel boards offer the longest lifespan, but composite and timber versions are also available depending on the style of the fence.

Using pressure-treated posts and rails significantly improves rot resistance. Pressure treatment forces preservatives deep into the wood grain, offering far better protection than dip treatment. However, even treated posts can eventually soften at ground level if exposed to moisture continuously.

Good maintenance also helps. Applying a high-quality wood preservative every few years keeps moisture out of the timber and reduces UV damage. Clearing soil, leaves and debris away from the base of the fence prevents moisture buildup.

Finally, ensuring proper installation is key. Posts set in concrete to the correct depth, with good drainage around the base, last far longer. At York Fencing we focus on deep, well-supported post footings to prevent water pooling around the timber.

With the right materials and sensible maintenance, timber fences can remain strong and attractive for many years.