When replacing windows and doors, homeowners must comply with energy and thermal performance standards, and ensure they get a certificate from FENSA or Local Authority Building Control to verify that their home improvements comply. FENSA enables companies that install replacement windows and doors to self-certify compliance under these Building Regulations without the need for a separate assessment from Building Control. Box Clever will provide you with a certificate confirming that their windows comply with the new regulations. Choosing a FENSA registered supplier gives you peace of mind. As a FENSA registered member, we have made a commitment to compliance with the new regulations and offer deposit protection insurance and insurance-backed guarantees.

InstallSure was established in 2005 by the Glass and Glazing Federation (GGF) in response to a need within the fenestration industry for a broker with a focus on providing high quality warranty insurance products at competitive prices. Growing strongly over the last decade, the organisation now offers warranty insurance policies to the whole home improvements industry and also has a developing portfolio of insurance products.

The Bygone Collection is British Board of Agrément, 'Whole of life'* endurance tested, meaning our product range is fully BBA approved.** This essentially means that everything is submitted for testing, including all components, balances and even our unique hardware. Additionally, and unlike any other company, our method of plant on Georgian bars convinced the BBA to approve them for ten years!

The Bygone Collection is British Board of Agrément, 'Whole of life'* endurance tested, meaning our product range is fully BBA approved.** This essentially means that everything is submitted for testing, including all components, balances and even our unique hardware. Additionally, and unlike any other company, our method of plant on Georgian bars convinced the BBA to approve them for ten years!

The Association of Chief Police Officers (ACPO) set up Secured by Design (SBD) to encourage the building industry to adopt crime prevention measures in housing. The scheme creates a safer and more secure environment, including safer windows. Very few products meet these enhanced security levels but by fully reinforcing our sashes with steel, using robust furniture and reinforced finger latches and then having them independently tested by SBD, means you can be satisfied that your windows will be as secure as we claim them to be.

Bygone windows are 'A' rated as standard BFRC is the British Fenestration Ratings Council and they decide how to interpret energy efficiency calculations for the whole of the UK. The BFRC rate products from 'F' to 'A'. 'A' rating means the window is energy neutral or 'energy positive', in that it gains more heat than it loses over its annual cycle. Find out more on FENSA and WER's at: www.bfrc.org

The Association of Chief Police Officers (ACPO) set up Secured by Design (SBD) to encourage the building industry to adopt crime prevention measures in housing. The scheme creates a safer and more secure environment, including safer windows. Very few products meet these enhanced security levels but by fully reinforcing our sashes with steel, using robust furniture and reinforced finger latches and then having them independently tested by SBD, means you can be satisfied that your windows will be as secure as we claim them to be.

The Energy Savings Trust can only recommend the highest performing companies so it is only the best products that get to be Energy Savings Trust endorsed. Having been awarded the first five certificates from the BFRC, (the British Fenestration Ratings Council), we were further recognised by the Energy Savings Trust as the first company to be recommended by them in the UK. energysavingtrust.org.uk

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Bluesky Certification are a UKAS accredited 3rd party certification body offering credible, independent 3rd party certification for the manufacture, installation and maintenance of doors, windows and fire resistant products. Their schemes set out the requirements that installers must meet, without specifying how they must be met, allowing installers flexibility and innovation in the way they operate their businesses.