Fully Flush Casement Window

The fully-flush casement extends the streamlined flush shape to both the interior and exterior of the window. It’s the ultimate in minimalist styling and ideal for the most modern styles of architecture.

Product features and benefits

  • WER to Band A++ with triple glazing
  • U-value as low as 0.95 W/m2K
  • Meets Building Regs without foams or special polyamides
  • 40mm and 45mm polyamide thermal breaks
  • True flush sash indoors and out (no stepped frame)
  • Market-leading slim sightliness
  • Flat rebates for easy-fit glazing packers
  • Knock-in beads.


Combining ultra-slim sections with simple shapes, Stellar’s fully flush casements are versatile. The frame simply isn’t allowed to dominate the view and the clean simple shape allows other architectural elements in your home to shine.

Flush inside and out, this is a high-performing window with graceful looks that hide remarkable strength. You’ll enjoy more comfort with Stellar’s insulation, more reassurance with its secure design, and more time to yourself because these windows are virtually maintenance free.

Every fully-flush casement window is a bespoke product. Made to your exact specification, with your choice of layout, glass, finish and hardware.

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.