Internal wall insulation · Kent
Internal wall insulation in Sevenoaks
Looking for internal wall insulation in Sevenoaks? We survey homes across Sevenoaks and the TN13 area, then give you a fixed written price before any work starts. We plan internal insulation in Sevenoaks homes room by room so you keep the rest of the house usable.
- Free survey in TN13 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Sevenoaks
Postcode, service and a phone number is all we need.
Included as standard
- Can be done one room at a time during a renovation
- Keeps the outside of the house exactly as it is
- Needs careful detailing at floor joists, reveals and corners
- Sockets, radiators, skirting and coving are moved and refitted
What we look for in Sevenoaks
We cover Sevenoaks and nearby Tonbridge, Swanley and Tunbridge Wells. Sevenoaks sits around 14 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 Sevenoaks with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Postcode district
- TN13
- County or area
- Kent
- Nation
- England
- Nearby
- Tonbridge, Swanley, Tunbridge Wells, Chislehurst
Permissions 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 Sevenoaks
| 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.
What happens next
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 Sevenoaks: questions
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
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.
Do you cover Sevenoaks?
Yes — we survey and quote internal wall insulation in Sevenoaks (TN13) and nearby Tonbridge, Swanley and Tunbridge Wells, with a fixed written price before any work starts.