APX Casement.
Aluminium Window System
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The thinnest frames we fit.
Cortizo’s Cor 70 Industrial is the reference‑standard casement system in European architecture. We specify it for every contemporary house, extension, and rear elevation where sightlines matter. The outer frame disappears to as little as 45mm, which means the glass becomes the architecture — not the metal around it.
At 70mm frame depth with a 32mm polyamide thermal break, it delivers a U‑value of 0.9 W/m²K paired with triple glazing. It will take glass up to 44mm thick, sashes up to 100kg, and handle wind loads certified to CE2400 — exposed coastal sites included.
Cortizo. Made in Spain.
Cortizo is the largest aluminium extruder in Europe and the default specification for high‑end residential and commercial architects across the continent. The profiles are engineered to sub‑millimetre tolerances, powder‑coated in their own in‑house facility, and shipped direct to our fabrication workshop.
The benefit for you: longer warranty, finer finish, tighter reveal, and the same profile architects in London specify for £5m new builds — fitted on your extension for a fraction of the cost.
Specifications
Cortizo Cor 70 Industrial system. 70mm frame and sash depth with 32mm glass‑fibre reinforced polyamide thermal break. Profile wall thickness 1.6mm (EN 12020‑2 Class EE standard). Triple EPDM weather seal. Available with concealed, exposed, or hidden‑sash aesthetic. Side‑hung, top‑hung, or fixed light configurations.
Reduced (slimline) and heavy‑duty options. Maximum sash size 1800×1800mm in heavy‑duty spec. Outward opening with concealed hinges. Available with standard, concealed, or push‑to‑open hardware. Can be specified as part of mixed‑module curtain walling with integrated fixed lights and structural silicone glazing.
Colour Options
Available in Black, Anthracite Grey, and White as standard.
Full RAL colour range available on request.
