Cavity wall insulation across the Scottish Borders
We cover 4 towns in the Scottish Borders: Galashiels, Hawick, Peebles and Kelso.
Exposure matters for every cavity wall. The Scottish Borders has a mix of moderate and more exposed sites. Hilltop, coastal and west-facing walls take the brunt of wind-driven rain, so the survey records exposure for each elevation before a material is chosen.
A suitable wall in the Scottish Borders is usually filled in a single day from outside, with drill holes made good to match the pointing. Where a Scottish Borders property has an extension or a conservatory, we check how the old and new walls meet, because that junction is often missed.
Building standards in Scotland
In Scotland, work associated with thermal insulating material within a wall is listed in schedule 3 of the Building (Scotland) Regulations as work that does not need a building warrant. It must still meet the building standards, so the survey still checks that the wall and the chosen material are suitable, including exposure to wind-driven rain.
Funding in Scotland
- Home Energy Scotland is the starting point for the Home Energy Scotland Grant and Loan and for Warmer Homes Scotland, which can include cavity wall insulation.
- Many councils also run area-based schemes for insulation in particular streets or estates.
- ECO4 runs until 31 December 2026 across Great Britain, including Scotland.
Sources: Scottish Government: building work not requiring a warrant (schedule 3); Home Energy Scotland; mygov.scot: grants and loans for energy saving improvements; GOV.UK: extending the ECO4 end date, government response.
What happens on the day?
Holes of around 22mm are drilled in the mortar joints in a set pattern, roughly a metre apart. The insulation is blown in from the bottom up until each section is full, then every hole is filled with colour-matched mortar. Air bricks and flues are protected, and a cavity barrier is fitted where your wall joins a neighbour's.
For an average house with easy access to the walls, the filling itself takes a few hours. Scaffolding or a tower is only needed for three-storey walls or awkward access, and that is priced up front.
What is included
- Suitability survey with photos and a written result
- Borescope check where the cavity is in doubt
- Certified mineral wool or bonded bead system
- Drilling, filling and colour-matched making good
- Cavity barriers at party walls
- Building regulations route for your nation, confirmed in writing
- Guarantee and installer named on your quote
Cavity wall insulation prices in the Scottish Borders
| Cavity wall insulation guide prices | Guide price |
|---|---|
| Detached house | £2,295–£3,795 |
| Semi-detached house | £1,495–£2,495 |
| End-terrace house | £1,295–£2,195 |
| Detached bungalow | £1,295–£2,195 |
| Semi-detached bungalow | £895–£1,595 |
| Mid-terrace house | £795–£1,395 |
No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
The steps for cavity wall insulation in the Scottish Borders:
Send your details
A minute online, or call the free number.
We check the walls
Construction, cavity width, debris, damp and wind-driven rain exposure.
You decide
Plain-English result and a fixed price, with no pressure to book.
Job done properly
Holes made good, paperwork handed over, guarantee details confirmed.