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The ST70 window uses a combination of thermally efficient, eco-friendly polyamide and extruded open cell EDPM rubber, increasing the effectiveness of the barrier to cold, reducing or eliminating the cause of condensation.

ST70 Window system


2 3/4” Window System

This enhanced thermal performance makes the ST70 window a very cost-efficient solution for your eco-friendly project.
With a glazing variant of 1 1/8” – 1 5/8“, this high-performance window is suitable for all types of construction from Residential to Commercial, Educational to Healthcare.

ST70 window system
ST70 Window system
ST70 Window system



The durability and performance characteristics of the ST70 window regarding acoustics and weather tightness have resulted in this system achieving surpassing the AAMA 101 standards for windows and doors, meeting the CW PG50 grade.

  • Includes multi-point locking for added security
  • Superb thermal performance
  • Eco-friendly polyamide core
  • Glazing thickness of 1 1/8” – 1 5/8
  • Identical sightlines throughout
  • Can be pre-assembled in-house saving installation time/cost
  • Available with single, dual color or anodized finish.
  • Polyester powder coating to ASTM 2604.
  • Matching rebate doors available
  • Evaluated and tested to AAMA 101 for windows and doors meeting the CW50 grade. 


The ST70 outward opening casement window is available in a variety of styles such as tilt and turn, casement (push out/in swing), awning, hopper or parallel sash. 

The versatility of the locking mechanism used in the ST70HI window allows the designers to incorporate extra-large sashes in the building.
St70 Tilt & Turn

Tilt & Turn

The ST70 Inward Opening Tilt & Turn Window System is a great solution to areas of a facade that require ease of access for cleaning or maintenance.

The windows durability and performance characteristics – acoustics and weather tightness, meet with the highest AAMA standards and are all independently tested by an ASTM approved and certified facility.

Parallel Sash

The ST70 parallel vent provides efficient natural ventilation to your building. The rate of air exchange can be controlled through its variable opening widths.

The ST70 parallel vent does not take up any room on the inside of the building, ensuring the streamlined finish is not interrupted.


Our Window Systems

  • ST60
  • ST70
  • ST70 HI
  • ST70 Concealed Sash
  • ST80
  • ST90
  • Life-Enhancing Window

View All Case Studies

The Roy - Halifax

The Roy

The Roy Halifax, Nova Scotia, Canada The Brief APA Facade Systems recently completed works

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