Insulation installers in the United Kingdom

Insulation Installers

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Find insulation installers across the United Kingdom, each compared on their reviews, verified credentials and named-source evidence across sources — independent evidence, no ads, no paid placement. Add your area below to see who's near you.

Find insulation installers in the United Kingdom

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What to check when hiring insulation installers in the United Kingdom

MyTrustedTraders ranks on independent public evidence — no ads, no paid placement. Use these checks alongside the evidence on each profile before you decide who to contact.

  • Look for consistent reviews across several named platforms, not one polished profile.
  • Check any verified credentials, and that the business details independently check out.
  • Get a written quote and keep guarantee, insurance and payment terms in writing.
  • Run the Cowboy Checker before you commit to anyone.

Which credentials should an insulation installer have? See the guide →

How to judge an insulation installer

Independent, no-ads guidance — the trade-specific checks that matter most, the warning signs, and what to ask before you hire. Use it alongside each trader’s public evidence above.

Verify before you hire

  • Check the installer is registered with TrustMark — it's free to search at trustmark.org.uk and is the UK government's own endorsed quality scheme.
  • For cavity wall insulation, confirm they're on the IAA/CWISC register (theiaa.co.uk) — this proves they're legally approved to self-certify the work under Building Regulations.
  • For solid or external wall insulation, check they hold a BBA Competent Person Scheme registration at bbacerts.co.uk — without it you may need separate building control approval.
  • Look up the company's age on Companies House — insulation scammers frequently dissolve and reopen under new names, so a business under two or three years old with no scheme memberships deserves extra scrutiny.

Warning signs of a cowboy

  • A cold-caller knocks on your door claiming your insulation is failing or that you qualify for a government grant — this is the UK's most documented insulation fraud tactic.
  • They can't show a TrustMark registration number or any Competent Person Scheme membership — no legitimate insulation installer doing certified work should be unable to.
  • They offer spray foam insulation without explaining the mortgage risk — many mortgage lenders now refuse to lend on homes with spray foam in the roof space.
  • Same-day pressure to sign or pay a deposit, especially cash-only — a proper installer will survey first and give you time to verify their credentials.

Questions to ask before you hire

  • Are you registered with TrustMark, and can you give me your registration number so I can check it?
  • Will you issue a CIGA 25-year guarantee for cavity wall insulation, or a BBA self-certification certificate for wall insulation — and is that included in the quote?
  • Have you surveyed the property for exposure zone and cavity suitability before recommending cavity wall insulation?
  • If you're offering this under a government grant scheme, which scheme is it and how can I verify my eligibility independently?

Frequently asked questions

How do I choose a trustworthy insulation installer?
Compare the public evidence on each profile — how many independent reviews they have and across how many named platforms, the rating and how recent it is, any verified credentials, and the company record. An insulation installer backed by several named sources is harder to fake than one with a single listing.
Does MyTrustedTraders rank or recommend insulation installers for payment?
No. There are no ads and no paid placement. Insulation installers are ranked only by the strength of independent public evidence — no one can pay to rank higher, add a badge, or change their reviews.
Where do the reviews come from?
They're imported from named public review platforms and always shown with the source named — they aren't reviews written on MyTrustedTraders. We cross-check the same business across sources rather than creating new reviews.
What should I check before hiring an insulation installer?
Confirm credentials and insurance directly with the insulation installer, get a written quote, and run the Cowboy Checker on the business first. MyTrustedTraders helps you shortlist on the evidence — it doesn't replace your own checks before you hire.

More ways to check who to trust

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