Whether you are planning to buy replacement windows or new windows for your dream home, making environmentally-minded choices for windows and doors allows you not only to protect the planet, but also to save money on your energy bills.



In an average home, up to 40% of its heat loss is through doors and windows so it’s important to understand the difference between the different options on the market,  in order to make an informed, responsible decision.

Windows and materials have specific ratings based on their sustainability and energy efficiency.

At VELFAC, we recognise the need to limit our impact on the environment, and this is reflected in the choice of materials and manufacturing processes that are employed to produce our windows and doors range.

Eco-friendly windows like VELFAC are not only built with outstanding quality, but they are also made with sustainable materials to help lower energy usage and costs.


High performance windows and doors

Energy efficiency it is not only about double glazing or triple glazing. From the quality and design of the seals to the thermal performance of the frame, each part of a window or door contributes to its overall insulation and quality of performance.

  • VELFAC wood aluminium windows are available in both double glazing and triple glazing. Our windows use low-e glazed units with argon filled cavities and low-e coatings as standard, and U-values as low as 0.80 W/m²K are achievable. We also provide documentary evidence in the form of a data sheet, detailing individual U-values for each window unit, and an area weighted U-value for every project.


  • The VELFAC 54mm frame profile means that we use less wood and aluminium in the frame components than some of our competitors, and the slim sightlines allow up to 15% more light to enter the interior, providing a better daylight contribution and a reduced need of artificial light in your house.

Responsibly sourced materials

  • All wood comes from sustainable sources and is FSC® certified
  • All wood treatments are water based
  • A VELFAC window unit is 93% re-usable
  • Approximately 30% of the aluminium used to produce VELFAC profiles comes from recycled sources, and 95% is produced using hydro-electricity. VELFAC suppliers have accredited Environmental Management and Audit Systems and are ISO14001 accredited.
  • VELFAC glass suppliers run detailed environmental management systems.