Insulation Specialist Costs in Harrow
London | Prices updated for 2026 | All estimates include labour and materials
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Estimated cost in Harrow
£459 - £1,179
Loft Insulation (full loft to 270mm)
Typical duration: 3-6 hours
Insulation Specialist Prices in Harrow
Loft Insulation
£459 - £1,179Labour
£262 - £655
Materials
£197 - £524
Typical duration: 3-6 hours
Cavity Wall Insulation
£655 - £1,834Labour
£393 - £1,048
Materials
£262 - £786
Typical duration: 2-4 hours
External Wall Insulation (EWI)
£9,170 - £23,580Labour
£5,240 - £13,100
Materials
£3,930 - £10,480
Typical duration: 2-4 weeks
Underfloor Insulation
£655 - £1,834Labour
£393 - £1,048
Materials
£262 - £786
Typical duration: 1-3 days
How Harrow Compares
More expensive
Trade prices in Harrow are typically 31% above the national average. This reflects local labour rates and the cost of living in London.
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 Harrow?
Insulation Specialist prices in Harrow typically range from £459 for loft insulation to £23,580 for external wall insulation (ewi). Prices include both labour and materials.
What is the average cost of loft insulation in Harrow?
Loft Insulation in Harrow costs between £459 and £1,179 on average, depending on the scope of work and materials chosen.
When is the cheapest time to hire a insulation specialist in Harrow?
Demand for insulation specialist work in Harrow is typically lowest in April. Booking during quieter months may mean better availability and competitive pricing.
Are insulation specialist prices in Harrow above or below the national average?
Insulation Specialist prices in Harrow are around 31% above the national average, reflecting higher local labour rates and cost of living.
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