Underfloor insulation for Eltham properties
Our Greater London coverage takes in Eltham (SE9) and nearby Blackheath, Welling and Catford. It is roughly 9 miles south-east of London.
In Eltham homes this is often done on the same visit as a cavity fill, which saves a second trip. We check ventilation as carefully as insulation in Eltham homes, because both matter for keeping a house dry.
For regulations, if cavity wall insulation follows in Eltham, filling a cavity is notifiable building work and needs a building notice or competent-person self-certification.
Funding in England
In England, ECO4 runs to 31 December 2026 and Warm Homes: Local Grant supports low-income households through councils.
Sources: GOV.UK: extending the ECO4 end date, government response; GOV.UK: Warm Homes Plan.
Keeping the void ventilated
Air bricks under a suspended floor must stay clear so the timbers stay dry. Insulation goes between the joists, not across the void, and gaps at skirtings are sealed to stop draughts.
What is included in Eltham
- Boards relaid
- Draught sealing at skirtings
- Insulation between joists
- Floor void inspection
Guide prices for Eltham
| Underfloor insulation guide prices | Guide price |
|---|---|
| Suspended timber floor, typical room | £795–£1,495 |
| Whole ground floor | £1,995–£3,995 |
No VAT is charged on installing insulation in homes until 31 March 2027 (then 5%). Guide ranges only: the fixed price is confirmed in writing before any work starts, and anything that could not be seen at survey is agreed with you first.
The steps for underfloor insulation in Eltham:
Tell us about the property
Postcode, property type and what you would like done.
Free survey
Access, condition, existing insulation and ventilation checked.
Written result and price
What we recommend and a fixed price before any work.
Work and tidy-up
Fitted at an agreed time, with ventilation kept clear.