Certification for GDI's

Green Deal Installer Certification (GDI - PAS 2030)



Stroma Certification’s UKAS accredited Green Deal Installer Certification Scheme (GDI - PAS 2030) allows installers to complete installation work for Green Deal measures in conjunction with Publically Available Specification 2030. Only a GDI can perform installation of Green Deal approved energy efficiency measures for a property. Only through certification can you refer to yourself as a Green Deal Installer and use the Green Deal Quality Mark.

Our Green Deal Installer Certification scheme is DBEIS approved and accredited by UKAS in line with ISO 17065:2012.

Application £100 | QMS Audit £240 | Site Assessment £240 | Online notification fee £1.60
Application is a one-off fee. Postal notifications are available for £3.00 per property. QMS Audit and Site Assessment fees are payable annually.
All prices exclude VAT.


What is Green Deal Installer Certification?

The Green Deal is a Government initiative which provides funding to allow homeowners to make energy-saving improvements to their property. Measures covered by the Green Deal included insulation, heating, double glazing and renewable technology. To qualify for Green Deal funding the installation must have been completed by a Green Deal Installer who is a member of a GDI Certification scheme.

Why join our GDI scheme?

Stroma Certification is synonymous with the Green Deal and we were involved in the development of the first formal certification schemes for GDAOs and GDIs.

By joining our GDI Certification scheme you will be able to display the Green Deal Quality Mark. This mark of approval is given to all certified Green Deal Installers, Advisors, Assessor Organisations and Providers.



Which measures qualify for Green Deal funding?

Stroma Certification has been authorised to run Green Deal Installer Certification schemes for the following measures or types of work:

Type Measure
Building Fabrics
  • Draught proofing
  • Energy efficient glazing and doors
  • External wall insulation*^
  • Internal wall insulation*
  • Cavity wall insulation^
  • Floor insulation
  • Loft insulation
  • Flat roof insulation
  • Hybrid wall insulation^
  • Pitched roof insulation
  • Room in Roof Insulation
Building Services Mechanical
  • Condensing boilers, warmnatural gas-fired and liquefied petroleum gas-fired (domestic and non-domestic)**
  • Condensing Boilers (Oil-Fired)
  • Flue gas recovery devices
  • Heating system insulation
  • Heating, hot water, air conditioning and ventilation system controls
  • Underfloor heating
  • Warm-air heating (Natural Gas and or Oil-Fired)
  • Hot Water Systems (Domestic & Non-Domestic)
  • Water Efficient Taps & Showers
Building Services Electrical
  • Electric storage heaters
  • Light fittings, lighting systems and lighting system controls

Please refer to the GDORB website for guidance on all GDI information.

TrustMark membership is also available for specific GDI measures for only £50+VAT.

* A SWIGA assessment is available for this measure.

** Gas Safe is required for Natural Gas.

^ Only applicable to buildings under 18m in height.



Making an application for GDI

Download our installer members pack for all the information relating to our GDI Certification scheme. You can then choose to apply for GDI Certification via our website or request a callback from our friendly certification team.




Certification for Electricians

Speak to our friendly customer team on
0845 621 11 11 (ext.622)

Certification for Electricians

Complete our customer callback form and we will call you to discuss your application

We will also need to see copies of relevant documents, qualifications and insurance cover. A pre-visit questionnaire will also be sent to you to we can collect some advance information about your company, staff and the installation work for which you have applied for certification.




Certification Scheme Information

Stroma Certification's Installer & GDAO Certification scheme documents are made available to the public, applicants and certified Organisations through a downloadable members pack that contains documents including the following:

  • Installer Application Form
    • To be completed for those Organisations requiring certification or alternatively the online application can be completed.
  • Scheme Handbook
    • Documents the certification scheme processes for granting, refusing, maintaining, renewing, suspending, restoring or withdrawing certification or expanding or reducing the scope of certification.
  • Impartiality Policy
    • Documents Stroma Certification's commitment to ensuring impartiality in all aspects of our certification and business activities. Further information is also available on the Consumer Advice page.
  • Complaints & Appeals Policy
    • Documents how a complaint or appeal can be notified to Stroma Certification and how it will be dealt with. Further information is also available on the Consumer Advice page.
  • Support Policy
    • Documents the means by which Stroma Certification can be contacted concerning Installer & GDAO certification and other business related activities.
  • ID Photograph Requirements
    • Documents the format and structure needed for photos to be used to produce the applicable certification ID card.

If you are unclear on any aspect of the certification process please contact Stroma Certification by emailing info@stroma.com or telephone 0845 621 11 11.




What is the GDI assessment procedure?

Our expert audit team will visit you to carry out an assessment. Your Stroma assessor will first audit your written documentation. This is called your desktop (or office) assessment. Then they will undertake a site assessment to cover each type of work for which you have applied under GDI Certification. Your assessment will be reviewed on an annual basis to maintain your certification.

Stroma Certification will perform a combined visit for the GDI measures included in your application. The assessment should include examination of all GDI measures applied for before certification can be awarded.

What is the Quality Management System?

A key part of the application process for PAS 2030 is to implement a compliant Quality Management System (or QMS). A QMS defines the processes and procedures followed by your business in the completion of any client or customer work. Stroma can advise you about approved systems. During the desktop assessment the assessor will audit your QMS documentation and provide an action plan to correct any non-conformities.

Green Deal Installer Certification


Membership Benefits

Installer Portal

Technical Support

Business Insurance

Stroma Store

Trustmark membership

SWIGA membership

Insurance Backed Warranties

Website design

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T | 0845 621 11 11*

©Stroma Certification Ltd 2017

*Calls cost 7p per minute plus your phone company's network access charge or call 01977 665420.