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COR70 Hidden Sash

The COR70 Hidden Sash is a high-performance aluminum window system by Cortizo engineered to deliver superior thermal efficiency and acoustic comfort without compromising on architectural elegance. Rated AW-PG70 under AAMA standards with a design pressure of 70.18 psf, it features near-zero air infiltration, Grade 10 forced entry resistance, an exceptional U-Value of 0.27, and an STC rating of 46 dB — all within a concealed sash profile that preserves clean, uninterrupted sightlines. Supporting sash weights up to 352.74 lb (160 kg) and dimensions up to 51″ × 96″, the COR70 Hidden Sash is the refined choice for homeowners who demand both performance and precision.

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Performance Ratings

AAMA Rating @ 59″ x 99″: AW-PG70
Design Pressure: 70.18 psf — 0.02″
Air Infiltration @ 6.24 psf: <0.06 cfm/ft²
Air Exfiltration @ 1.57 psf: <0.01 cfm/ft²
Water Resistance: 15.04 psf (pass)
Uniform Load @ 105.27 psf: <0.01″
Forced Entry (Type B): Grade 10
U-Value: 0.27
STC Rating: 46 dB

Opening Options

Tilt & Turn — Ventilation + full open functionality
Turn Only (Side Hung) — Classic casement-style opening
Tilt Only (Hopper) — Controlled top-inward ventilation
Fixed (Inoperable) — Maximum thermal & structural performance

Profile Specs

Profile Thickness: 1/16″ (1.9 mm)
Max Glazing Thickness: 1 9/16″ (40 mm)
Polyamide Strip Length: 1 3/8″ (35 mm)
Frame Section: 2 3/4″ (70 mm)
Sash Section: 2 3/4″ (70 mm)

Maximum Dimensions Per Sash

Dimension Imperial Metric
Maximum Width 51″ 1,300 mm
Maximum Height 96″ 2,400 mm
Maximum Sash Weight 352.74 lb 160 kg

CORTIZO Authorized Cortizo dealer — European-engineered aluminum systems.

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