How much does insulation cost in Teesside? (2026)
Insulation in Teesside costs £400 to £800 for a full loft, £700 to £1,500 for cavity walls, £2,000 to £4,000 for spray foam removal, £4,000 to £8,000 for internal walls, and £800 to £2,000 for floors in 2026. ECO4 funds the work free for eligible homes.
Payback, honestly calculated
Insulation is the rare home improvement with a defensible return-on-investment calculation. Using Energy Saving Trust methodology on current gas prices: a loft brought from nothing to 270mm saves £200 to £340 a year on a gas-heated semi, so £400 to £800 comes back in two to four winters. Cavity fill saves £150 to £280 a year, paying back in three to six. Draught-proofing pays back in one to two. Internal wall insulation is the long game at six to twelve years, but on a solid-wall terrace it transforms comfort in a way bills alone don't capture, and ECO4 frequently removes the cost entirely.
What moves a quote
- Access: hatch size, boarded lofts, crawl-space depth. The survey measures, the quote reflects.
- Condition: damp insulation to remove, rubble in cavities, failed pointing to fix before filling.
- Scope honesty: a proper loft quote includes ventilation checks, pipe lagging, hatch sealing and fire hoods where needed, not just rolls of wool.
- Guarantees: 25-year CIGA on cavity fill. Quotes without it are cheaper for a reason.
How to compare quotes
Ask every installer for the same thing: an itemised written quote after a physical survey, materials named, waste and making-good shown, guarantees stated. Three itemised quotes side by side and the right choice is usually obvious. The phone-quote that never saw your loft is not a quote, it is a number.
2026's honest context
Material prices stabilised through 2025 into 2026, and labour is the rising component. The practical effect: prices are roughly flat year on year, but grant funding is the live variable, pots open and close quarterly. If you might be ECO4-eligible, the survey costs nothing and the answer changes the whole price conversation.
| Job | Typical price | Typical payback |
|---|---|---|
| Loft insulation, 270mm | £400–£800 | 2–4 years |
| Loft top-up (over ~100mm) | £250–£450 | 1–3 years |
| Cavity wall fill, bonded bead | £700–£1,500 | 3–6 years |
| Spray foam removal | £2,000–£4,000 | unblocks the sale |
| Internal wall insulation | £4,000–£8,000 | 6–12 years |
| Suspended floor insulation | £800–£2,000 | 4–8 years |
| Draught-proofing package | £150–£400 | 1–2 years |
| ECO4 grant insulation | free for eligible homes | immediate |