Accreditations and Memberships

Glevum hold a number of accreditations and memberships that provide assurance that we adhere to the highest standards of workmanship and installation.

Listed here are some of the most important, along with an explanation of the benefits that this brings to you as a Glevum customer.


Ultraframe and Which? Trusted Traders recognise reputable and trustworthy traders who successfully pass a rigorous assessment process.

As an approved member of the Ultra Installer scheme we have to meet the high standards of both Which? Trusted Traders and Ultraframe in terms of service and quality. To ensure you get the highest quality of service here’s what you can expect from Glevum:


  • We will only undertake work that we are competent to do.
  • Provide you with a clear breakdown of how much the job will cost before any commitment is made by you.
  • Discuss all the options available to help provide you with a tailored solution.
  • Endeavour to stick to timeline and costs agreed by both parties.
  • Provide you with an updated quote should you require any changes to the initial agreement.
  • Be open and approachable should you have any queries.
  • Treat your property with respect and clean up as we go along.


  • We always use high quality Ultraframe products for all our roofs.
  • Our sales people are technically trained to find building solutions for your needs.
  • All our roofs are specifically designed for the wind and snow loads in YOUR postcode.
  • Full project management service from design to completion.
  • Our surveyors are assessed by Ultraframe.
  • Our staff are trained by the manufacturers on how to install products.
  • Ultraframe have approved our high quality after sales service.




FENSA is the industry standard for replacement window and door installers self-certifying compliance with the building regulations. Glevum are registered with FENSA and adhere to all their standards

What are the benefits to you of Glevum being FENSA registered?
Save time and costs:

  • You do not have to register your window or door installation with the local authority yourself. Not only is the FENSA approach much faster and easier – it will also save you up to £250!
  • Compliance with the Building Regulations without the added cost and time of arranging assessment by Building Control
  • If you own properties across different local authorities – for consistency of quality and price, you are able to use the same FENSA installer for all installations, as they can work in all Local Authority jurisdictions
  • Confidence in FENSA installers:
  • FENSA is the brand trusted by all local authorities, industry and government.
  • An independent report commissioned by the Government found FENSA to be the most successful of all competent person schemes to date in the UK, across all industries.
  • Vetting: All FENSA registered companies are continually re-assessed by an independent inspection body to ensure consistency of Building Regulations adherence and service.
  • FENSA proactively protects consumers from the cowboys – not only by withholding the scheme from those unable to pass FENSA’s independent assessments; but also by reporting to Local Authorities and Trading Standards companies who erroneously claim FENSA registration, to enable prosecution.



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The Glass and Glazing Federation is the main representative organisation for companies involved in all aspects of the manufacture of flat glass and products and services for all types of glazing, in commercial and domestic sectors. Glevum are members of the GGF.

By employing a GGF approved member to carry out all your windows/doors/conservatory needs, you will be investing in workmanship and service of the very highest standard.

In order to become a member of the GGF, installers have to show proof of previous experience and meet a number of qualifying requirements. Once they are accepted as a member they are continually vetted by us, must follow our ‘Code of Good Practice’ and are expected to work to standards as laid out in our ‘Glazing Manual’.

For added peace of mind, all consumers, landlords, who choose a recognised GGF installer will also benefit from our FREE conciliation service in the unlikely event that something goes wrong or they are left unhappy with the level of work completed. This seeks to resolve any disputes between members and customers in a quick and timely manner.

Glevum are proud to be members of the Glass and Glazing Federation and as such comply with their Consumer Code of Practice. You can view a free copy of this code at




Glevum operate under the Consumer Code Approval Scheme operated by The Chartered Trading Standards Institute (a nationally recognised brand, by the foremost regulatory authority in the retail sector).



Safe Contractor is a leading health and safety pre-qualification assessment scheme, dedicated to promoting higher standards of competence and compliance. Safe Contractor is the fastest growing health and safety accreditation scheme in the UK.

Glevum’s membership demonstrates our health and safety competence.



CHAS is the Contractors Health and Safety Assessment Scheme. CHAS carries out health and safety pre qualification assessments to a nationally recognised and accepted threshold standard. These assessments are used by hundreds of public and private sector buying organisations such as councils and housing associations. Glevum’s membership of CHAS is further assurance of our rigorous health and safety standards.




TrustMark is a quality mark which operates a framework which 30 plus scheme operators who work in the repair, maintenance and improvement (RMI) sector, including trade associations (such as the Glass and Glazing Federation), work under.

These schemes are approved to carry the TrustMark logo and recruit reputable and trustworthy tradesmen. This enables the TrustMark scheme operators to promote improved RMI sector standards, and tackle related issues such as better enforcement. All of these scheme operators are audited annually by TrustMark, to ensure processes, standards and complaint procedures are being maintained.

  1. What makes selecting TrustMark tradesmen so worthwhile?
  2. A firm’s technical skills have been independently checked through regular on-site inspections, as well as checks on their trading record and financial status;
  3. Firms have signed up to a code of practice that includes insurance, good health and safety practices and customer care;
  4. The approved scheme operator has checked and will continue to monitor the firm’s quality of work, trading practices and customer satisfaction;
  5. Firms are able to offer an Insurance Backed Warranty;
  6. Deposit Protection Insurance is available for consumers in the event a firm should cease trading;
  7. Firms will be able to tell you about any building regulations you must comply with and may also be able to provide appropriate certificates;
  8. If you have a problem or disagreement with the firm, there will be a clear and user-friendly complaints procedure to help resolve the issue;
  9. The scheme is fully supported by Government, the building industry and consumer protection groups.
  10. All of these checks will give you – Peace of Mind
  11. Because Glevum displays the TrustMark logo you know that we have been approved and inspected by the GGF and found to meet the required Government endorsed criteria.




The Glazing Arbitration Scheme (TGAS) which has now superseded The Glazing  Ombudsman (TGO), is an independent Not for Profit organisation for resolving disputes between Consumers and Registered Businesses such as Glevum.

TGAS offer real consumer protection for homeowners, with a straightforward Arbitration Scheme that provides a fair and ‘hassle- free’ means of redress in the unlikely event that anything goes wrong.



Glevum are members of the Guild of Master Craftsmen. A sign of quality. The Guild of Master Craftsmen continues a long established tradition of bringing together skilled people engaged in a trade, craft or profession in order to safeguard the interests of the public. With rogue tradesmen and poor workmanship sadly as widespread today as it ever has been, there is as much need today for the Guild of Master Craftsmen to provide the public with access to skilled tradesmen.


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Satisfied Customers

"Very professional, arrived on time and on date, fitted door well, cleaned up mess, tidy, friendly service start to finish."


"Delighted with the windows and never seen 2 men (fitters) work together with such speed and efficiency."

SS Wooton-Under-Edge

"Very good. We were impressed with the surveyor's advice which resulted in us saving money."


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