Flush Casement Window

Stellar Aluminium casement windows have an immaculate, streamlined flush shape externally, the opening pane is aligned perfectly with the window’s frame. Inside, there’s a neat stepped appearance.

Product features and benefits

  • WER to Band A++ with triple glazing
  • Up to 12% more glass area than a comparable window
  • U-value to 0.95 W/m2K
  • Flush and Fully Flush designs
  • Market-leading slim sightlines
  • Flat rebates for easy-fit glazing packers
  • All assemblies, trims and cills for bay and bow windows


Immaculate flush lines to the exterior with the neat square profile to the inside delivers an aluminium casement window that works in a wide range of properties. It is simple enough for modern architecture but has proportions and options that make it a great choice for more traditional homes too. There are Astragal bars for those who want detail, an alternative fully-flush sash, and cills designed specifically to match the dimensions of timber frames.

Why Stellar Aluminium?

Stellar is strong. The aluminium window sections can support the weight of large panes of glass without extra reinforcing, allowing individual panes to be larger. Without the complexity of transoms and mullions, views are unrestricted, and more light can flood into your home. Stellar also offers the benefit of equal sightlines for opening and non-opening panes without resorting to adding dummy sashes to the layout.

Casement Window Options

You can choose almost any configuration of fixed and opening panes, any colour and hardware finish, and the result will be a stunning window that looks fabulous and protects your home.

Stellar Colour Range


Signal White
RAL9003 Flat Matt

Anthracite Grey
RAL7016 Flat Matt

Anthracite Grey / Signal White
RAL7016 / RAL9003 Flat Matt

Jet Black
RAL9005 Flat Matt

Jet Black / Signal White
RAL9005 / RAL9003 Flat Matt

Made to Order

RAL9001Flat Matt

Agate Grey
RAL7038Flat Matt

Slate Grey
RAL7015Flat Matt

Chocolate Brown
RAL8017Flat Matt

Anthracite Grey


Stellar’s quality demands an equally high-quality range of hardware.

aluminium casement window handle in white

Casement Window

Tilt & Turn Window

aluminium door handle

Flush Door

lift and slide door handle

Lift & Slide Door

Bifold Door

Inline Sliding Door

Colours and Finishes

Handle finishes have been selected for scratch resistance and durability as well as their ability to complement the finish of frames.

silver handle

Satin Silver

chrome handle

Polished Chrome

white handle


black handle


All colours and imagery displayed is for illustrative purposes - please get in touch if you would like further information.