ST70 Casement

The ST70 outward opening casement window is available in a variety of styles such as top hung or side hung and can be externally or internally beaded. All styles include multi-point locking for added security. The versatility of the locking mechanism used in the ST70 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 including PAS24 Standards and are all independently tested by a UKAS approved and certified facility.

For more information regarding our ST70 window systems, get in touch here.

  • Includes multipoint locking for added security
  • Superb thermal performance whether open in or out
  • Excellent thermal performance
  • Eco-friendly polyamide core
  • Glazing variants are 28mm-42mm up (1.1″-1.6″)
  • Identical sight lines throughout
  • Can be pre-assembled in-house saving installation time/cost
  • Fully tested to current BS/EN standards within a UKAS approved facility
  • Certified to PAS 24 standards
  • Available in dual colour or anodized finish
  • Matching rebate doors available

Frame70mm
EN ISO 1077-1Uw Whole window value: *1.6 W/m²K or less
BS 6375-1:2009Air:Class 4
BS 6375-1:2009Water:Class E1050
BS 6375-1:2009Wind:Class A5
BS 6375-2:2009Operating forces:Class 1
BS 6375-2:2009Mechanical strength:Class 3
BS 6375-2:2009Repeated opening & closing:Class 3 (Heavy Duty: 30,000)
PAS 24:2012Security 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.

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