Group B · Cavity and internal walls
Thin internal liners and aerogel
Slim aerogel or thin boards where floor space matters.
Priced after survey
Thin internal liners and aerogel
Every job like this is different, so we measure first and give you a fixed written quote. The price depends on:
- The area and access
- What's there now and its condition
- The system and finish you choose
No obligation — your survey confirms what suits and what it costs.
- Best for
- Small rooms, flats, single cold walls
- Guarantee or standard
- Manufacturer data
- Time on site
- Cavity fill is usually done in a day for a typical house.
- Typical price
- Priced after survey
What it is
What is thin internal liners and aerogel?
Slim aerogel or thin boards where floor space matters.
Best for: Small rooms, flats, single cold walls.
Build-up
Internal wall insulation
- 1Plaster skim
- 2Insulated plasterboard, or stud with mineral wool
- 3Vapour control, detailed at floors and reveals
- 4Existing solid wall
Who it suits
Which homes is thin internal liners and aerogel suitable for?
Is my home suitable?
Pick your property type for a straight answer on thin internal liners and aerogel.
Guidance only — every home is different, and a survey confirms what suits yours.
Houses
- Detached house
- Semi-detached house
- End-of-terrace
- Mid-terrace
- Townhouse
- Mews house and cottage
- Detached bungalow
- Semi and terraced bungalow
- Chalet and dormer bungalow
- Period home
- 1930s home
- Post-war and ex-council house
- Non-traditional / system-built
- Listed building or conservation area
- Farmhouse, barn conversion or rural home
- New build or self-build
Flats and blocks of flats
Commercial and public buildings
Usually suitable Depends — a survey confirms
Not usually suitable for 1 property type
- Park and mobile home — Park and mobile homes need specialist systems, which we arrange through a partner rather than standard measures.
Materials and brands
What we use
Slim aerogel or thin insulation boards where floor space matters.
Insulation brands we work with
- Knauf Insulation (Earthwool, Supafil blown)
- Rockwool
- Superglass
- Isover
- Kingspan
- Celotex
- Recticel
- Xtratherm
- Steico wood-fibre
- YBS and Actis multifoil
The exact system and brand for your home are confirmed in your written quote.
Heat, bills and EPC
What it does for your heat loss, bills and EPC
An empty cavity lets heat pass straight through the wall. Filling it lowers the wall's U-value considerably, so rooms hold their heat for longer and the heating runs less — often one of the best-value measures on an EPC for homes with unfilled cavities. Solid walls lose even more heat; lining them inside gives a similar improvement, room by room.
See the EPC points and savings for your home in the EPC plannerU-value before and after, typical heat and bill saving, and EPC points — worked out for your property.Price
How much does thin internal liners and aerogel cost?
Priced after survey
Jobs like this vary too much for a fair online price, so we measure first and give you a fixed written quote — with no obligation.0% VAT on energy-saving materials
Insulation, solar panels, batteries and heat pumps installed in homes in Great Britain are zero-rated for VAT until 31 March 2027. Windows and doors are not included.What to expect
Time on site, disruption and approvals
Time on site
Cavity fill is usually done in a day for a typical house. Extraction and internal wall insulation take longer and are confirmed at survey.
Disruption
Lower than a full IWI system — slimmer boards mean less moving of fittings, though the room is still cleared.
Planning and building control
Cavity wall insulation must comply with Building Regulations and is certified through a competent person scheme or building control. Internal wall insulation doesn't need planning, but listed buildings need consent.
Guarantee and standard
Manufacturer data. The guarantee and certification for your job are confirmed in writing in your quote.
60-second grant check
Could a grant help pay for it?
Grant eligibility checker
About 60 seconds · plain results: likely, possibly or not eligible
Before we start
What type of property is it?
Questions
Thin internal liners and aerogel: your questions answered
How thin can internal wall insulation be?
Aerogel blankets and thin boards are among the slimmest options available, so you lose very little floor space. They insulate less than a thicker system, but far better than an uninsulated wall.
Where do thin internal liners make sense?
Small rooms, flats, single cold walls, window reveals and alcoves — anywhere every centimetre matters.
Will a thin liner stop mould on a cold wall?
By warming the wall surface, it reduces the conditions that cause mould. Ventilation still matters, so we check that too.
Group B
More in cavity and internal walls
Cavity wall insulation
A borescope survey, then blown mineral wool or bonded bead injected into empty cavity walls.
Cavity wall extraction and refill
Failed, wet or slumped cavity insulation removed, wall ties checked, then refilled.
Cavity wall tie replacement
Replacing corroded wall ties, often found during cavity extraction.
Cavity survey only
Borescope and thermal imaging to show whether a wall is empty, part-filled or failed.
Party wall cavity insulation
Filling cavity party walls to stop hidden 'party wall bypass' heat loss.
Narrow and hard-to-treat cavities
Specialist bead or wool systems for narrow, stone-faced, exposed or high-rise cavities.
Begin your project
Ready to talk about thin internal liners and aerogel?
Tell us about your home and we'll arrange a survey, then a fixed written quote — no obligation.