Insulation contractor with a small crew

Run a small crew with a van and blowing machine, taking on larger jobs for landlords and schemes.

Startup cost£8k to £35k
Monthly revenue£6k to £25k
Time needed35+ h/week
First incomeMonths
  • £8k-35k
  • Full-time
  • Out and about

Estimates for a small start in the UK, not guarantees.

Official data

37,269 UK companies in this field, 29% registered in the last 2 years

SIC 43290 “Other construction installation”. Source: Companies House, November 2026.

What it is

A full-time insulation business with a van, specialist equipment (such as a blowing machine) and one or two crew, handling bigger jobs like whole-house lofts, cavity wall fill, underfloor insulation and rental portfolios.

Your first three steps

  1. Get experience and the training or certification relevant to the insulation types you want to offer
  2. Price up a van, machine and insurance, and open trade accounts with insulation suppliers
  3. Contact local landlords, letting agents and small builders to offer reliable subcontract or portfolio work
Who pays

Landlords, letting agents, housing associations, small builders who subcontract insulation, and homeowners paying privately or through funded schemes.

How it makes money

Priced per job or per square metre, with repeat work from landlords and builders. Larger jobs bring more revenue but need more materials upfront.

Skills that help
  • Insulation installation experience
  • Estimating and pricing jobs
  • Managing a small team and schedules
  • Basic paperwork, invoicing and record keeping
Watch out for
  • Public liability and employer's liability insurance once you hire
  • Installer accreditation (for example TrustMark, PAS 2030 or similar) is often needed for funded schemes, check the current requirements
  • Cavity wall and spray foam work carry higher risk of damp or moisture problems, check training, guarantees and warranty requirements
  • Cash flow, you buy materials before customers pay, so agree deposits and payment terms
  • Employment rules, including whether workers are employed or self-employed, check with HMRC
  • Health and safety for working at height and in confined spaces, plus waste disposal rules for offcuts

🔒 Full research report for UK

Real cost breakdown with current prices, licences and registration checklist, local competition, pricing, break-even and a 30-day launch plan, with sources.

Coming soon

Questions people ask

How much does it cost to start an insulation contractor business?

Startup costs are typically around £8,000 to £35,000, depending on your van, blowing machine and other equipment, insurance and initial materials. These are estimates, so get quotes for the kit and cover you need.

What accreditation or rules should I check before starting?

Check current requirements: installer accreditation such as TrustMark or PAS 2030 is often needed for funded schemes. Check training, guarantees and warranty needs for cavity wall and spray foam work, and insurance such as public liability and employer's liability once you hire.

How much can an insulation contractor with a crew earn?

Monthly revenue is typically around £6,000 to £25,000, depending on job size, how many crews you run and your pricing. The estimate assumes at least about 35 hours a week. You buy materials before customers pay, so agree deposits and terms.

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