Opal Windows Systems


Window Systems


Aluminium windows are fast becoming the material of choice for homeowners who want a low-maintenance window with high performance levels at an affordable cost. A naturally durable material, aluminium improves the warmth and energy efficiency of your home whilst also looking fantastic. The slim profiles mean more light and less frame providing a contemporary, sleek appearance. With a range of systems to choose from and hundreds of colours and finishes, aluminium windows are the perfect investment for any home.

Opal window systems are made to order with great pride right here in the UK. Each window system is designed, manufactured, quality checked, packaged and delivered to the highest of standards with each customer in mind. All Opal windows were designed to be as thermally efficient as possible. The profiles of each window feature an extended polyamide thermal break to enhance thermal performance - this in turn keeps the room warmer yet lowers your energy bills. Current Building Regulations Part L require all replacement windows to have a U-value of 1.6 W/m2K or less. All our windows are 1.5 W/m2K or less.


Windows are assessed by the British Fenestration Rating Council (BFRC) and rated using a A to G scale on the basis of their total energy efficiency where an A rated window is more efficient than a G rated window. The rating covers the frame material, the frame design, glass type and all other components that make up the window.


With energy bills on the rise, thermal efficiency remains one of the number one priorities for most homes. Loss of heat plays a major part in the usability and comfort of any living space and as a result causes high energy bills. All the Opal windows and doors are enhanced with innovative polyamide thermal barrier technology which enables all our systems to exceed the energy performance requirements of current UK Building Regulations.

  • Building control requires windows to satisfy either a U Value of 1.6 or lower or a WER of C or better.
  • Building control requires doors to satisfy either a U Value of 1.8 or lower or a WER of E or better.

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