Instead of digging holes for fence posts, metal post supports may be sunk into the ground instead, and wooden posts inserted into them. This will reduce the length of the wood needed for fence posts and keeps them out of contact with the soil, thus prolonging the life of the wood. Fences up to 1.2 m (4 ft) high will need supports of 60 cm (24 in), whilst fences up to 2 m (6 ft) will need 75 cm (30 in) supports.

Method

1. Before driving the support into the ground, fit an offcut of wood from a post into the socket. This protects the support from damage. Many manufacturers provide a special attachment that fits over the offcut whilst the support is hammered into place.
2. Use a sledgehammer to drive the support directly into the ground.
3. Keep checking that the support is entering the ground vertically. Hold a spirit level against each of the four sides in turn.
4. Insert the fence post into the socket at the top of the support and secure it by tightening the clamping bolts in the socket or fixing it with nails or screws through the slatted holes. For added strength, metal post supports may also be set in a foundation of hardcore and concrete.
5. Using a string guide, hammer in further post supports.
6. Nail fencing to the posts.