Thinking about installing external wall insulation? Before choosing a contractor, it’s important to know exactly who you’re trusting with your home, and that’s where TrustMark comes in.
With so many companies offering insulation and rendering services across the UK, how do you know which one meets the highest standards? TrustMark is the UK’s only government-endorsed quality scheme for tradespeople, and when it comes to something as important as insulating your home, it’s worth understanding what this means for you.
In this guide, we’ll explain what TrustMark is, how it applies to external wall insulation, and why hiring a certified installer matters. We’ll also break down related certifications like PAS 2030 and Green Deal Installer status, so you can feel confident in your choice.
Trustmark is the UK government-endorsed quality scheme that provides consumers with a high level of reassurance when hiring tradespeople to carry out work on their homes. It operates across a wide range of domestic trades, including:
Businesses accredited by Trustmark are vetted for their technical competence, trading practices, and customer service. They must comply with a Code of Conduct and Customer Charter, and are regularly monitored to ensure standards are maintained.
Trustmark plays a crucial role in building consumer trust in the home improvement and energy retrofit sector. Its main contributions include:
TrustMark gives people confidence by showing which traders meet recognised standards, helping protect them from poor workmanship, non-compliant businesses, and scams that have caused problems in the past.
TrustMark isn’t just a badge of quality, it’s an important part of the PAS 2035/2030 rules that guide how energy-saving work like External Wall Insulation (EWI) is carried out in the UK.
For an EWI company, being TrustMark registered means:
This end-to-end responsibility helps guarantee that the EWI system performs as expected, saving energy, improving comfort, and adding value to the home.
Therefore, if you’re looking to insulate your home with confidence, working with a TrustMark-registered installer helps ensure the job is done professionally, safely, and to current regulatory standards.
Being TrustMark registered is a great start, but it’s even more reassuring when your installer holds other key certifications. Together, these confirm they follow proper industry standards and have the expertise to carry out energy-efficient upgrades like external wall insulation safely and professionally.
PAS 2030 – For Installers
PAS 2030 is the standard that tells installers how to properly fit energy-saving measures like EWI. It covers things like how the work is done, the materials used, and what checks are needed.
PAS 2035 – The Big Picture
PAS 2035 is about the whole house, not just one job. It makes sure homes are properly assessed and designed before work starts. That means checking for damp, heat loss, and what the home really needs, not just adding insulation and hoping for the best.
PAS 2030 and 2035 go together. One covers installation, the other covers planning.
UKAS & Simply Certification
When it comes to EWI, it’s essential that installers are certified by a trusted and recognised body. That’s where UKAS (the United Kingdom Accreditation Service) comes in, they oversee and approve certification bodies to ensure everything is done to a high standard.
Simply Certification is one such UKAS-accredited body. They assess whether installers meet important standards like PAS 2030. If your installer is certified through Simply, it means their work is regularly checked for quality and compliance giving you peace of mind that your insulation project is in safe hands.
Green Deal Approved – Still Relevant
Although the Green Deal scheme is no longer running in full, being a Green Deal Approved Installer shows that the installer has met strict government standards in the past, a sign of proven experience and credibility in energy-efficiency work like external wall insulation.
Before agreeing to any work, it’s important to check that your chosen installer is officially TrustMark registered.
You can do this by visiting the official TrustMark website and using the ‘Find a Tradesperson’ directory. Simply enter the company name or your postcode and select the relevant trade (e.g. External Wall Insulation) to confirm their status. If the installer is registered, their profile will appear along with details of their certification and services.
No, but it's highly recommended. TrustMark registration shows that an installer meets government-backed standards for quality, safety, and customer care.
Yes, but using a TrustMark-registered installer gives you more confidence in the quality of the work and added consumer protection.
It means the installer follows strict standards and approved methods. While it doesn’t guarantee perfection, it helps ensure the job is done right and built to last.
For external wall insulation projects, certifications give homeowners peace of mind that the work will meet high standards of quality, safety, and energy efficiency. By choosing an accredited installer, you're not only protecting your property from poor workmanship, but also supporting the UK’s goal to reduce carbon emissions and improve energy performance in homes.
We’re a TrustMark-registered installer with over 15 years of experience in solid wall insulation and professional rendering services. Our work improves energy efficiency, reduces heat loss, and gives your home a clean, modern finish that lasts.
We work in various areas of the Midlands as well as in the South of England. The best way to find out if we can take on your project is to get in touch via our contact form.
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