Underfloor insulation for Portishead properties
Our Somerset coverage takes in Portishead (BS20) and nearby Nailsea, Clevedon and Weston-super-Mare. It is around 35 miles north-east of Taunton.
We check ventilation as carefully as insulation in Portishead homes, because both matter for keeping a house dry. In Portishead homes this is often done on the same visit as a cavity fill, which saves a second trip.
As for paperwork, if cavity wall insulation follows in Portishead, 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 Portishead
- Insulation between joists
- Draught sealing at skirtings
- Floor void inspection
- Boards relaid
Guide prices for Portishead
| 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.
What happens next for a Portishead property:
Get in touch
Online, by phone or WhatsApp.
Survey visit
We check the space, what is there now and how it is ventilated.
Your quote in writing
A fixed price, with any extras listed separately.
Booked work
Carried out by the installer named on your quote.