Timber vs Concrete Sleepers for Retaining Walls

If you're weighing up a sleeper retaining wall, the sleeper is the part everyone looks at — but it's not the part that decides how long the wall lasts. Here's how the options compare.

Treated pine sleepers

The budget-friendly choice for lower garden and terrace walls. Straight, easy to work, and fine for the right job — just the shortest-lived of the options.

Hardwood sleepers

Denser and longer-lasting than pine, with a richer look. Costs more, rewards you with years.

Composite sleepers

Won't rot, warp or split — a clean, low-maintenance finish that holds up for years.

Concrete sleepers

The strongest and longest-lasting, especially for taller walls. Clean lines and built to outlast the lot.

The bit that actually matters

Whichever sleeper you choose, we set them into galvanised steel H-beam posts — not cut timber buried in the ground. Steel below ground doesn't rot the way timber posts do, so the wall stays stronger for far longer. Pair that with proper drainage and footings and any of these sleepers will do its job. Get those wrong and the best sleeper in the world still leans.

Tell us your height and soil and we'll recommend the right build — not just the prettiest sleeper.