Internal wall insulation · Hertfordshire
Internal wall insulation in St Albans
Need internal wall insulation in St Albans? Tell us about the property and we'll arrange a free survey and a written quote. For terraced homes in St Albans with attractive brick fronts, one approach is to insulate the front internally and the rear externally.
- Free survey in AL1 and nearby
- Guide price from £75 per m² 0% VAT
- Fixed written price before work starts
Free survey in St Albans
Postcode, service and a phone number is all we need.
What's included
- Keeps the outside of the house exactly as it is
- Insulated plasterboard, stud wall or breathable systems
- Sockets, radiators, skirting and coving are moved and refitted
- Can be done one room at a time during a renovation
What we look for in St Albans
We cover St Albans and nearby Harpenden, Hatfield and Hemel Hempstead. St Albans sits around 7 miles from Watford. The East of England has a mix of post-war estates, inter-war semis and older solid brick and flint cottages, with some system-built council homes on post-war estates.
Much of Hertfordshire 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.
We plan internal insulation in St Albans homes room by room so you keep the rest of the house usable.
- Postcode district
- AL1
- County or area
- Hertfordshire
- Nation
- England
- Nearby
- Harpenden, Hatfield, Hemel Hempstead, Welwyn Garden City
England: planning and regulations
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 St Albans
| 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 St Albans: questions
Can I stay in the house?
Yes, but each room is out of use while it's worked on, typically 3–5 days.
How much room space will I lose?
Usually 50–100mm on each insulated wall, depending on the system.
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 St Albans?
Yes — we survey and quote internal wall insulation in St Albans (AL1) and nearby Harpenden, Hatfield and Hemel Hempstead, with a fixed written price before any work starts.