Internal wall insulation · Kent
Internal wall insulation in Tonbridge
From Tonbridge to Tunbridge Wells, we price internal wall insulation after a measured survey — no guesswork, and no work starts until the price is agreed in writing. Where a property in Tonbridge is in a conservation area or the front elevation must stay unchanged, internal insulation is often the practical route.
- Free survey in TN9 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Tonbridge
Postcode, service and a phone number is all we need.
Included as standard
- Keeps the outside of the house exactly as it is
- Needs careful detailing at floor joists, reveals and corners
- Loses roughly 50–100mm per insulated wall
- Can be done one room at a time during a renovation
Tonbridge: walls, weather and approvals
As well as Tonbridge itself, we quote in Tunbridge Wells, Sevenoaks and Crowborough. Tonbridge is about 12 miles from Maidstone. Homes across the South East range from inter-war semis and post-war estates, which are mostly cavity-walled, to older solid-walled cottages and Victorian town terraces.
Much of Kent sits in the lower wind-driven rain exposure bands, which keeps the choice of finishes wide — though hilltop, coastal and exposed gable walls can still need a tougher specification, so we check the actual site.
For terraced homes in Tonbridge with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Postcode district
- TN9
- County or area
- Kent
- Nation
- England
- Nearby
- Tunbridge Wells, Sevenoaks, Crowborough, Maidstone
Planning and building control in England
Internal insulation rarely needs planning permission, but in England and Wales insulating or replastering more than half of a wall's area involves building control, and listed buildings need consent for internal changes that affect their character.
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 Tonbridge
| 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
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 Tonbridge: questions
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.
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 Tonbridge?
Yes — we survey and quote internal wall insulation in Tonbridge (TN9) and nearby Tunbridge Wells, Sevenoaks and Crowborough, with a fixed written price before any work starts.