Insulation Specialist Costs in Cardiff
Wales | Prices updated for 2026 | All estimates include labour and materials
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Estimated cost in Cardiff
£333 - £855
Loft Insulation (full loft to 270mm)
Typical duration: 3-6 hours
Insulation Specialist Prices in Cardiff
Loft Insulation
£333 - £855Labour
£190 - £475
Materials
£143 - £380
Typical duration: 3-6 hours
Cavity Wall Insulation
£475 - £1,330Labour
£285 - £760
Materials
£190 - £570
Typical duration: 2-4 hours
External Wall Insulation (EWI)
£6,650 - £17,100Labour
£3,800 - £9,500
Materials
£2,850 - £7,600
Typical duration: 2-4 weeks
Underfloor Insulation
£475 - £1,330Labour
£285 - £760
Materials
£190 - £570
Typical duration: 1-3 days
How Cardiff Compares
Around the national average
Trade prices in Cardiff are typically 5% below the national average. This reflects local labour rates and the cost of living in Wales.
Seasonal Demand for Insulation Specialist Work
Peak demand is typically in Nov, with the quietest period around Apr. You may find lower prices and better availability during off-peak months.
What Affects the Price
Loft Insulation
- Loft area (square metres)
- Existing insulation depth
- Insulation type (mineral wool, blown fibre, rigid board)
- Access hatch and boarding requirements
- Whether pipes and tanks need insulating
Cavity Wall Insulation
- Property size and wall area
- Cavity width and condition
- Insulation material (bead, foam, fibre)
- Number of drill points and scaffolding
- Whether a borescope survey is needed first
External Wall Insulation (EWI)
- Wall area (square metres)
- Insulation board type and thickness
- Render system and finish
- Scaffolding requirements
- Window and door reveals, sills, and detailing
Underfloor Insulation
- Floor area and type (suspended timber or solid)
- Accessibility of the subfloor void
- Insulation material (rigid board, spray foam, mineral wool)
- Whether floorboards need lifting
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Frequently Asked Questions
How much does a insulation specialist cost in Cardiff?
Insulation Specialist prices in Cardiff typically range from £333 for loft insulation to £17,100 for external wall insulation (ewi). Prices include both labour and materials.
What is the average cost of loft insulation in Cardiff?
Loft Insulation in Cardiff costs between £333 and £855 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a insulation specialist in Cardiff?
Demand for insulation specialist work in Cardiff is typically lowest in April. Booking during quieter months may mean better availability and competitive pricing.
Are insulation specialist prices in Cardiff above or below the national average?
Insulation Specialist prices in Cardiff are around 5% below the national average, making it a more affordable area for this type of work.
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