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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 - £1,179

Labour

£262 - £655

Materials

£197 - £524

Labour 56%Materials 44%

Typical duration: 3-6 hours

Cavity Wall Insulation

£655 - £1,834

Labour

£393 - £1,048

Materials

£262 - £786

Labour 58%Materials 42%

Typical duration: 2-4 hours

External Wall Insulation (EWI)

£9,170 - £23,580

Labour

£5,240 - £13,100

Materials

£3,930 - £10,480

Labour 56%Materials 44%

Typical duration: 2-4 weeks

Underfloor Insulation

£655 - £1,834

Labour

£393 - £1,048

Materials

£262 - £786

Labour 58%Materials 42%

Typical duration: 1-3 days

How Harrow Compares

CheapestNational avgMost expensive

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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

Jan
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Dec

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

Insulation Specialist Profiles Near Harrow

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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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