APA Facade Systems have recently developed our ST70 Concealed Sash window. It has a slim design, with a surface of only 66mm from the exterior. The Slim profile provides the inside of the building with a substantial increase in luminosity.
A 35mm thermally broken area, and the insertion of a polyamide core (ranging from 24mm to 44mm) in the frame and sash, allow it to reach values of up to 1.0W/m²k of transmission, maximising its energy efficiency.
Acoustically this system has an increased level of sound insulation with the possibility of installing high-performance units of up to 40mm.
The ST70 Concealed Sash meets all of the BS EN regulations demonstrating excellent water tightness, air permeability, and wind resistant values. With these features and it’s slim design, this window system is the ideal choice for apartments, houses or student accommodation.
Discover the test results and technical information on the ST70 Concealed Sash here.
You can also download our manual.