Group F · Natural and specialist insulation
XPS
Moisture-resistant, high-strength board for inverted roofs and below ground.
Priced after survey
XPS
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
- Moisture resistant, high strength
- Guarantee or standard
- Manufacturer data
- Time on site
- Depends on where the material goes — loft, wall, floor or roof — and is confirmed at survey.
- Typical price
- Priced after survey
What it is
What is XPS?
Moisture-resistant, high-strength board for inverted roofs and below ground.
Best for: Moisture resistant, high strength.
Who it suits
Which homes is XPS suitable for?
Is my home suitable?
Pick your property type for a straight answer on XPS.
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
Where we use it: Inverted roofs, floors, below ground.
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
These materials keep heat in just as the conventional equivalent does in the same position — the improvement depends on where they go and how thick they are. Their advantages are elsewhere: breathability and moisture handling for old walls, summer heat protection in roofs, or high performance in very little thickness.
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 XPS 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.Natural insulation typically costs more than mineral wool — see the natural insulation guide for the typical uplift.
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
Depends on where the material goes — loft, wall, floor or roof — and is confirmed at survey.
Disruption
The same as the equivalent loft, wall, floor or roof job.
Planning and building control
The same rules as the service it's used in. On solid and listed walls, a moisture risk assessment comes first, and 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
XPS: your questions answered
What is XPS insulation?
Extruded polystyrene board — strong and resistant to moisture.
Where is XPS insulation used?
Inverted roofs, floors and below-ground walls.
Why use XPS rather than EPS?
XPS has higher compressive strength and water resistance, which matters under paving or in the ground.
Group F
More in natural and specialist insulation
Wood-fibre insulation
Breathable boards and batts with good summer heat protection and low carbon.
Sheep's wool insulation
Natural insulation that handles moisture, popular with period owners.
Hemp and hemp-lime
Breathable, very low carbon insulation for walls and floors.
Cellulose (recycled paper)
Recycled-content blown insulation for lofts and timber frames.
Cork board
Natural, durable, breathable board for walls and floors.
Aerogel
The best performance per millimetre — for reveals, thin liners and heritage work.
Begin your project
Ready to talk about XPS?
Tell us about your home and we'll arrange a survey, then a fixed written quote — no obligation.