30-Metre Dry Stone Retaining Wall — Aberdeenshire

A 30-metre dry stone retaining wall, built 2.5 metres high from reclaimed stone in Aberdeenshire. A wall this size doesn’t get built quickly, and it doesn’t get built lightly. Every course has to carry the load above it.

The Brief

Two numbers set the scope of this job. Thirty metres long. Two and a half metres high.

A retaining wall holds back ground. That means every horizontal metre of the build is also a vertical metre of pressure pushing forwards, and every additional course adds more of it. By the time you reach 2.5 metres, the wall behind you is doing real structural work — and the only thing standing between that work and a collapse is how well the stones beneath it were laid.

Working With Reclaimed Stone

Every stone in this wall was reclaimed.

Reclaimed stone arrives the way it arrives — different sizes, different shapes, different weathering. None of it is uniform. That’s the appeal once it’s built; the wall has the character that new-cut material can’t replicate. But before it’s built, it’s a sorting job and a cutting job and a planning job all at once.

Each stone has to be assessed for its working face, its bedding plane, its weight class, and where it fits in the run. Some get cut back to make them sit; some get held aside for the through-courses; some don’t make the wall at all. The skill is in reading every piece before it goes down.

The Structure

A retaining wall isn’t just a tall wall. It’s a leaning wall.

The face is built to a slight batter — a backwards lean of a few degrees so the load above pushes the wall down into itself, not out and away from itself. The hearting (the rubble fill in the middle of a double-skin dyke) gets packed tight, course by course, so the two faces lock together rather than acting as two thin walls fighting each other.

Through-stones run the full thickness at regular vertical intervals, tying the front and back faces into a single structure. Without them, a wall this height fails. With them, properly placed, the wall stands as one piece.

The Result

Thirty metres of clean dry stonework, holding ground that needed to be held.

Walls like this earn their keep over decades, not seasons. Built right, they last as long as the ground behind them does. That’s what reclaimed stone gives you, and that’s what proper laying delivers.