Accreditations and Memberships

– Prentice Glass Limited  –

Prentice Glass aim to achieve the highest standards possible in health and safety, customer service, quality assurance and industry regulations. To do this we are affiliated and accredited by some of industries most creditable auditors. Below is a brief description of each for your understanding. For further information please feel free to visit the relevant websites for each organisation.
The Glass and Glazing Federation

The Glass and Glazing Federation (GGF) is a trade association representing companies who make, supply or fit, glass and glass related products. This includes replacement windows, doors, conservatories, hardware for these products, and all aspects of glass, including double glazed units, safety glazing, fire resistant glass, emergency glazing, decorative glass, secondary glazing, and solar control applied films and sealants.

As an active member of the federation, we have access to all changes in regulations and standards as well as specialist advice in technical and health and safety issues. Our General Manager John Mannell has been Chairperson for London Region since 2018 and current Chair Person for the Industries Health and Safety Committee.

If you would like to look further into the GGF Consumer Codes, you can download various consumer leaflets


FENSA stands for the Fenestration Self-Assessment Scheme. It has been set up by the Glass and Glazing Federation (GGF) and other industry bodies with Government encouragement in response to the current Building Regulations for England and Wales. When having windows and doors replaced homeowners must comply with current thermal performance standards and ensure that they get a certificate of compliance from FENSA or from Local Authority Building Control. FENSA also enables companies that install replacement windows and doors to self-certify compliance under these Building Regulations.

The Glazing Arbitration Scheme

The Glazing Arbitration Scheme (TGAS) is an independent ADR (alternative dispute resolution) scheme, which is the primary ADR scheme for the Glass & Glazing industry, plus other glazing related and home improvement products. TGAS is operated by Chartered Trading Standards Institute certified ADR body, the Centre for Effective Dispute Resolution (CEDR)

TGAS registered traders consists of GGF member companies who sell direct to consumers (featured on ) and FENSA registered firms who have opted into the scheme.

The Arbitrator provides a fair and impartial judgement for both consumers and traders.


TrustMark is the Government Endorsed Quality Scheme covering work a consumer chooses to have carried out in or around their home

When a consumer uses a TrustMark Registered Business, they know they are engaging an organisation that has been thoroughly vetted to meet required standards and has made a considerable commitment to good customer service, technical competence and trading practices.

By ensuring all Registered Business adhere to and maintain these standards through our expert network of Scheme Providers, TrustMark gives consumers increased confidence and choice. Additionally, if a problem does arise, Trustmark offers a range of remedies to give further protection to consumers.

A new addition to Trustmark scheme is the customer feedback section which allows you to leave honest reviews of the work we do. If you would like to please  leave a review


SafeContractor delivers a tailored health and safety accreditation allowing contractors to showcase their capabilities to potential customers. There is now a community of over 33,000 like-minded contractors and use the SafeContractor badge to enhance their business profile and demonstrate compliance. All audits are done inline with SSIP accreditation showing our dedication to promoting higher standards of competence and compliance through the provision of relevant industry specific and tailored health and safety training.

Check A Trade
Check’a’trade offers you a directory of trades and services who have been vetted to their high standards, for example by verifying insurance, qualifications and professional memberships. Not only that, they also monitor our work on an ongoing basis by collecting feedback directly from their customers. Since 1998 they have collected hundreds of thousands customer reports which give you the facts about the strengths and weaknesses of our companies like ours. You know what you are getting. Recommendation, reputation, and a standard you can trust. If you would like to please leave us a customer review

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