Internal wall insulation · Cornwall
Internal wall insulation in Truro
From Truro to Falmouth, we price internal wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. For terraced homes in Truro with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Free survey in TR1 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Truro
Postcode, service and a phone number is all we need.
Included as standard
- Insulated plasterboard, stud wall or breathable systems
- Loses roughly 50–100mm per insulated wall
- Can be done one room at a time during a renovation
- Keeps the outside of the house exactly as it is
Before we quote in Truro
We cover Truro and nearby Falmouth, Redruth and Newquay. Truro is about 8 miles from Redruth. The South West has many stone and solid-walled cottages, exposed coastal properties and a share of post-war system-built houses, including types such as the Cornish Unit.
Parts of Cornwall fall in the higher wind-driven rain exposure bands, especially coastal and upland sites, so render specification, movement joints and detailing at cills, verges and the base of the wall matter more than usual.
We plan internal insulation in Truro homes room by room so you keep the rest of the house usable.
- Postcode district
- TR1
- County or area
- Cornwall
- Nation
- England
- Nearby
- Falmouth, Redruth, Newquay, Camborne
England: planning and regulations
Planning isn't usually involved with internal insulation. Building control is, once more than half of a wall is treated, and listed buildings need listed building consent.
What are the options for internal insulation?
- Insulated plasterboard — PIR or phenolic foam bonded to plasterboard, fixed to the wall and skimmed. Thinnest option.
- Insulated stud wall — a timber or metal frame filled with insulation, with a vapour control layer and plasterboard. Takes more space but runs services easily.
- Wood fibre and lime — breathable boards finished in lime plaster, for older walls that need to manage moisture.
Internal wall insulation prices in Truro
| Item | Guide price | Notes |
|---|---|---|
| Insulated plasterboard, supplied and skimmed | £75–£110 per m²0% VAT | |
| Insulated stud wall | £90–£130 per m²0% VAT | |
| Typical bedroom, one external wall | £1,795–£2,9950% VAT | Including making good |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
How it works
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Internal wall insulation in Truro: questions
Is internal insulation cheaper than external?
Per m² usually yes, but the cost of moving fittings and redecorating narrows the gap on whole-house jobs.
What happens to my radiators and sockets?
They're taken off and refitted on the new wall face. Electrical work is done by a qualified electrician.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
Do you cover Truro?
Yes — we survey and quote internal wall insulation in Truro (TR1) and nearby Falmouth, Redruth and Newquay, with a fixed written price before any work starts.