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FENSA stands for the Fenestration Self-Assessment Scheme. Following Government encouragement, FENSA has been set up by the Glass and Glazing Federation (GGF) and other industry bodies in response to Building Regulations for double glazing companies in England and Wales.

When replacing windows, doors and roof lights in dwellings in England and Wales, homeowners must comply with current thermal performance and Building Regulation standards and ensure they get a certificate from a Competent Person scheme such as FENSA or Local Authority Building Control. 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.

FENSA obtains funds to supports its certification operations through a combination of membership fees and inspection fees. FENSA does not aim to accumulate or distribute any surpluses, but set its charges at levels appropriate to finance the continuing operation and expansion of its certification product, and to provide prudent reserves against contingencies.

REHAU delivers “Unlimited Polymer Solutions” and is the premium worldwide brand for polymer-based innovations and systems in building solutions, automotive and industry. The company generates continuous growth through its expertise and innovative capabilities in materials development, systems design and surface technology. We are already directing our developments toward such future-significant topics as energy efficiency, renewable energy, water management, mobility and future living. Some 20,000 employees at over 170 locations around the world ensure the success of the independent and privately held company.

GGFi 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.

PLANITHERM is Europe’s best-selling range of high performance low-emissivity glass (low-E glass) that uses the very latest advancements in thermally insulating glass coating technology to save you money on your energy bills.

We can advise you on the most energy efficient windows for your home, we offer A rated windows which will save you money, But if you want the optimum energy efficiency. Then we have a range of triple glazing windows available which are among the most efficient A rated windows on the market.

With the energy savings trust estimating that up to 26% heat lost from homes is via poorly insulated windows, our A rated solutions easily justify our claims that they should be seen as an investment and not a cost


PLANITHERM is Europe’s leading energy saving window glass and is the most efficient glass available. It uses advanced coating technology to reflect radiated heat back into the room, rather than allowing it to escape through the windows.

At the same time, PLANITHERM captures warmth from natural daylight by allowing it to pass through the glass