ST70 HI Casement Window

The APA Facade Systems design team have just developed a new thermally enhanced ST70 HI casement window system. Using the centre seal from our original ST70 HI, the new system includes new polyamides and new foam cores resulting in a substantial increase in thermal transmission, producing a whole window Uw value as low as 0.97W/m²K.

This system is available in a variety of styles including top hung, side hung, tilt and turn or as a parallel sash. It comes internally or externally beaded with multi-point locking for added security. The versatility of the locking mechanism used in the ST70 HI window allows the designers to incorporate extra-large sashes in the building.

The windows durability and performance characteristics regarding acoustics and weather tightness meet with the highest BS/EN standards, independently tested by a UKAS approved and certified facility. The ST70 HI is the perfect solution for multi-level residential developments.

You can view the product brochure below:

ST70 HI brochure - APA Facade Systems

For more information regarding our ST70 HI range, get in touch with us here.

  • Whole window Uw value as low as 0.97Wm2/K (Triple Glazed)
  • Tested to Pas 24 and SBD standards
  • Fabricated using recycled aluminium and plastic materials
  • Tested to EN12101 smoke ventilation
  • Single or dual colour available
  • Double or triple glazing up to 42mm in thickness
  • New polyamides used in the window assembly
  • Can be pre-assembled in-house saving installation time/cost
  • Matching rebate doors available
  • Identical sight lines throughout
  • New foam core to increase thermal performance
  • Includes multi-point locking for added security

Frame Depth 70mm
EN ISO 1077-1 Uw Whole window value: * as low as 0.97 W/m²K
BS 6375-1:2009 Air: Class 4
BS 6375-1:2009 Water: Class E1050
BS 6375-1:2009 Wind: Class A5
BS EN ISO 717-1 Acoustic: 60 dwb
BS 6375-2:2009 Operating forces: Class 1
BS 6375-2:2009 Mechanical strength: Class 3
BS 6375-2:2009 Repeated opening & closing (30,000): Class3 (Heavy Duty)
PAS 24:2012 Security classification: Certisecure

*Whole window U values are a combination of the frame and glazing thermal performance and as such will vary with the specification of glass utilised. Please consult with the APA technical team for more specific performance information.

Related Systems

ST70 HI High Performance Tilt and Turn Window 2020

ST70 HI Tilt & Turn Window

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