Sternfenster now offers its new Alitherm 400 aluminium casement window in a flush finish.

“When we launched the Alitherm 400 at the start of 2024, it was a continuation of our trend of meeting and exceeding customer demand,” said Sternfenster’s sales director, Nathan Court said. “It has slim sightlines, it is high performing, and it is quick and easy to install.

“By launching a flush version of the Alitherm 400, we are supporting our customers as they target the high end of the refurbishment market specifically, where the demand for a sleek flush finish is at its highest.”

Sternfenster’s Alitherm 400 flush casement window achieves a Window Energy Rating of A with a double-glazed unit, making it fully compliant with Building Regulations for refurbishment projects.

It can also achieve a U-value of 1.2W/m2K with a triple glazed unit (with a centre-pane U-value of 0.8W/m2K), making it ideal for newbuild properties.

The 70mm thermally broken aluminium window also boasts leading weather performance, successfully passing: BS EN 1026 (air permeability); BS EN 1027 (water tightness); BS EN 12211 (wind resistance); and can meet PAS24 or Secured By Design requirements thanks to optional sash claw locks.

The new Alitherm 400 window comes with Sternfenster’s new Quickglaze knock-in glazing bead with co-extruded gaskets, which is designed to reduce time spent on site.

The Alitherm 400 casement window comes with additional features that help meet the many demands homeowners place on new windows. These include dual colour options, trickle vents, triple glazing up to 38.8mm, and mega egress hinges if the window needs to offer a fire escape route.

“The Alitherm 400 window offers flexibility across a range of projects, meeting multiple demands,” said Nathan. “Thanks to features like dual colour, PAS24/Secured By Design compliance, and now the flush sash option, we are helping to create profitable opportunities for our customers.”