Cortizo Hidden Sash Windows

Pure Trade Aluminium supplies hidden sash windows to trade professionals across Leicester, Derby, Northampton, and the surrounding areas. These modern aluminium windows feature ultra-slim sightlines and a fully concealed sash, offering a sleek, minimalist look with excellent thermal and acoustic performance.

With a single, consistent communication process, we offer expertise, knowledge and technical support. Speak to our friendly team today to find out more.

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Thermally Efficient

Available in Many Styles and Colours

Secured by Design Upgrade

Let in Natural Light

Key Benefits of Cortizo Hidden Sash Windows

Cortizo Hidden Sash windows are engineered to create a clean, minimalist look with sightlines as narrow as 66mm. The sash is completely hidden from the outside, giving the appearance of fixed glazing while remaining fully functional.

This is ideal for architects and developers working on high-end residential or commercial builds where sleek design and maximum light are key selling points. It helps you deliver a premium finish that stands out in today’s competitive market.

Built with advanced polyamide thermal breaks and high-spec glazing options, Cortizo hidden sash windows meet and exceed current thermal regulations. They help improve energy efficiency, ensuring they reduce heat loss and are sustainable.

Additionally, excellent acoustic insulation makes them a great fit for urban or high-traffic areas—an essential feature for projects where occupant comfort is a priority.

Our hidden sash windows come in many sizes and opening styles, and RAL colour finishes, including dual-colour options. They can be tailored to meet specific design and functional requirements on any residential or commercial project.

The flexibility of these hidden sash windows gives you full design freedom without compromising on performance.

Our hidden sash windows are designed with secure multi-point locking systems and tested to meet PAS 24 security standards. As a result, customers will be safer for a longer period of time.

With Pure Trade Aluminium, you get fast, reliable supply and expert support to ensure your installations meet all current building regulations—on time and within budget.

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Specification

Polyester Powder Organic Coating To BS6496

PAS 24 Approved For Added Security

Wide Variety Of Colour Options

Excellent Thermal & Weather Performance

Cost-Effective Glazing Process

Our Downloads

Our trade ready brochure features product specifications and support options to help you plan and deliver outstanding results. Get your copy now and see how Pure Trade Aluminium can assist with your next build.

COR 60 Hidden Sash.pdf / 0.13 MB

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COR 70 Hidden Sash C16 ST.pdf / 0.19 MB

COR 70 Hidden Sash.pdf / 0.17 MB

COR 70 OC Half - Hidden Sash.pdf / 0.17 MB

COR 80 Hidden Sash.pdf / 0.14 MB

Get in Touch With Pure Trade Aluminium Today

Reach out to Pure Trade Aluminium on 0116 296 2932 to arrange your consultation. Serving Leicester, Derby, and Northampton, we offer prompt lead times, a streamlined support service, and efficient supply to keep your projects on track.

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Frequently Asked Questions

What is a hidden sash window?

A hidden sash window is designed so the opening sash is concealed behind the outer frame when viewed from the outside, giving the appearance of a fixed window while still being fully movable.