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Case study · Highlands · 2026

Cavity wall insulation in the Highlands

A bungalow built into a wooded hillside, stone-faced at the front and roughcast at the back, with an integral garage underneath. Two finishes and a steep site, one cavity to fill.

Stone-faced Highland bungalow having cavity wall insulation injected

The house

A 1960s-style bungalow on a sloping Highland site: reconstituted stone blocks on the front elevation, pebbledash roughcast round the back, a garage set into the hill below the living space, and trees on every side. It's cavity construction throughout, and the cavity had never been filled.

Houses like this are common across the Highlands and they're cold: exposed, often on oil or electric heating, with a lot of external wall for the floor area. Filling the cavity is one of the cheapest ways to make a real difference to the heating bill.

What we did

  1. Borescope survey

    Camera inside the wall to confirm a clear, empty cavity behind both the stone face and the roughcast, with no rubble or damp.

  2. Drill pattern to suit both finishes

    Holes set in the mortar joints on the stone-faced front so they disappear once filled, and on a grid through the roughcast at the back.

  3. Bead injection

    Bonded beads blown in from low level upward, working round the garage and the steep rear path, section by section until full.

  4. Make good

    Holes filled to match, garden and paths cleared of stray beads before we left.

Cavity wall injection at low level beside an integral garage, Highlands

Front elevation: holes in the mortar joints of the stone face.

Cavity wall injection through roughcast at the rear of a Highland bungalow

Rear elevation: roughcast, tight path, same fill.

Awkward sites are normal up here

Hillside plots, narrow back paths, garages under the house: that's a lot of Highland housing. A cavity rig with a long hose doesn't mind, and it's why we plan Highland jobs properly rather than turning up and hoping.

We price Highland work with travel included and group jobs so the drive north isn't on your bill. Highland addresses qualify for the rural uplift on Scottish Government funding.

Cavity wall insulation in the Highlands

Insulation hose running up to a high-level injection point, Highlands

Is your wall a cavity?

If your house was built after the 1920s, probably. The camera survey settles it in minutes and it's free. Call 0800 069 9339.

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