Internal wall insulation · Cornwall
Internal wall insulation in Falmouth
Internal wall insulation in Falmouth: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. Where a property in Falmouth is in a conservation area or the front elevation must stay unchanged, internal insulation is often the practical route.
- Free survey in TR11 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Falmouth
Postcode, service and a phone number is all we need.
What you get
- Loses roughly 50–100mm per insulated wall
- Keeps the outside of the house exactly as it is
- Sockets, radiators, skirting and coving are moved and refitted
- Needs careful detailing at floor joists, reveals and corners
Homes and walls in Falmouth
We also cover Truro and Redruth, close to Falmouth. Falmouth is about 9 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 Falmouth homes room by room so you keep the rest of the house usable.
- Postcode district
- TR11
- County or area
- Cornwall
- Nation
- England
- Nearby
- Truro, Redruth, Camborne, Newquay
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 risks with internal insulation?
Insulating inside makes the masonry colder, so moisture risk rises. Weak points are where floor joists bear into the wall, window reveals and corners. A condensation risk check for the build-up, a continuous vapour control layer where specified, and returning insulation into reveals deal with most of it.
Internal wall insulation prices in Falmouth
| 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.
From enquiry to finished wall
Tell us about the property
Use the quote tool or form, or call. Photos help.
Free survey
We measure, check the walls and confirm approvals.
Fixed written quote
System, details, access, exclusions and VAT in writing.
Installation
Scheduled for suitable weather, with a clear programme.
Internal wall insulation in Falmouth: questions
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
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.
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.
Do you cover Falmouth?
Yes — we survey and quote internal wall insulation in Falmouth (TR11) and nearby Truro, Redruth and Camborne, with a fixed written price before any work starts.