Internal wall insulation · East Sussex
Internal wall insulation in Portslade
Internal wall insulation in Portslade: free survey, written specification and a fixed price, with the details that keep walls dry planned from the start. For terraced homes in Portslade with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Free survey in BN41 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in Portslade
Postcode, service and a phone number is all we need.
What you get
- Keeps the outside of the house exactly as it is
- Loses roughly 50–100mm per insulated wall
- Needs careful detailing at floor joists, reveals and corners
- Can be done one room at a time during a renovation
Portslade: walls, weather and approvals
We cover Portslade and nearby Hove, Brighton and Worthing. It's roughly 3 miles from Portslade to Brighton, the largest town in East Sussex. 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.
Exposure to wind-driven rain varies across East Sussex: sheltered town streets fare better than walls on high ground or facing the prevailing weather, and the render, beads and cill details are chosen with that in mind.
We plan internal insulation in Portslade homes room by room so you keep the rest of the house usable.
- Postcode district
- BN41
- County or area
- East Sussex
- Nation
- England
- Nearby
- Hove, Brighton, Worthing, Burgess Hill
Approvals 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 options for internal insulation?
- Insulated plasterboard — PIR or phenolic foam bonded to plasterboard, fixed to the wall and skimmed. Thinnest option.
- Insulated stud wall — a timber or metal frame filled with insulation, with a vapour control layer and plasterboard. Takes more space but runs services easily.
- Wood fibre and lime — breathable boards finished in lime plaster, for older walls that need to manage moisture.
Internal wall insulation prices in Portslade
| 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 Portslade: questions
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
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.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
Do you cover Portslade?
Yes — we survey and quote internal wall insulation in Portslade (BN41) and nearby Hove, Brighton and Worthing, with a fixed written price before any work starts.