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Modern two-storey house with large windows, white walls, and black wooden panelling, featuring an attached garage and a driveway, surrounded by trees and greenery.
Prices from £1,200

Cortizo Casement Windows

Explore the superior performance of Cortizo Casement Windows featuring a thermally broken window system with side and top hung outward openings. These windows are designed with a 32 mm thermal break zone, delivering excellent energy efficiency.

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Thermal Break Zone32 mm
Security CertificationPAS 24
Acoustic InsulationRw up to 45 dB
Air PermeabilityClass 4
Wind ResistanceClass CE 2400
Secured By Design
ISO 9001 Certified
FENSA Registered
Constructionline Gold

Cortizo Casement Windows Features

Start with the published benefits that most affect performance, appearance and day-to-day use.

Exceptional Performance

Cortizo Casement Windows offer unparalleled energy efficiency and security. With a thermal break of 32 mm and certification to British security standards (PAS 24), these windows ensure both comfort and safety. Perfect for residential and commercial projects, they support maximum glazing up to 44 mm and deliver acoustic insulation up to 45 dB.

A modern, three-panel window with a dark grey frame. The left panel is tall and rectangular, while the right side features one large and one small rectangular panel stacked vertically.

Thermal Efficiency

Achieve transmittance Uw from 1.0 W/m²K with outstanding energy savings.

Secure Design

Certified with PAS 24 for enhanced security.

Resilient to Weather

Class E1200 water tightness and Class 4 air permeability.

Acoustic Comfort

Provides noise reduction up to Rw 45 dB.

A large bay window with grey frames on a brick house reveals a warmly lit room inside with plants, a lamp, a dining table, and chairs.

Innovative and Durable

With a lightweight design featuring a slim sideline of merely 65 mm, Cortizo Casement Windows allow for greater brightness indoors without compromising on durability, made from high-grade aluminum that assures longevity with its anti-corrosive properties.

  • Slim and modern aesthetics with a 65 mm sideline.
  • Maximum dimensions for varied sash designs.
  • Extensive range of colors and finishes.
  • High-grade aluminum construction.

Customization Options

Available in an unlimited color range including powder coatings, metallic, textured finishes and more. Dual color options allow exterior aluminium with interior wood finish for aesthetic harmony in home settings.
  • Unlimited RAL color options.
  • Anodized finishes with QUALANOD certification.
  • Available in flush and standard versions.
  • Dual-color customizations possible.
Modern two-storey brick house with large windows, glass balconies, and a paved drive, photographed on a cloudy day.

Project Workflow

From initial concept to final installation.

Measure

Precise measurements ensure a perfect custom fit.

Manufacture

Engineered to specification using high-quality materials.

Install

Professional installation guarantees optimum performance.

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Product Specifications

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Features & benefits

What this system is designed to do

Use these practical characteristics to judge whether the product suits the opening, architecture and way the space will be used.

Thermal Break Zone32 mm
Security CertificationPAS 24
Profile Thickness1.6 mm
Polyamide Strip Length32 mm

Gallery

Browse installations, product details, and finish inspiration from recent projects.

A modern, black-framed window with three panels; one small top panel, one narrow side panel, and one large main panel, all with handles, set against a plain white background.
A modern, three-panel window with a dark grey frame. The left panel is tall and rectangular, while the right side features one large and one small rectangular panel stacked vertically.
A large bay window with grey frames on a brick house reveals a warmly lit room inside with plants, a lamp, a dining table, and chairs.
Modern two-storey brick house with large windows, glass balconies, and a paved drive, photographed on a cloudy day.
A brick house with a newly fitted white bay patio door and large windows, featuring grid-patterned glass panes, under construction.
A three-storey brick building with black-framed windows, a red door, and visible construction materials stacked below bay windows on the ground floor.
A brick building with a fence and grass.
Three-storey brick townhouse with white panelling, black-framed windows, a satellite dish, and a wooden fence in the foreground. Two workers in high-visibility vests are visible on the ground floor.
A white framed glass door and window set in a brick wall, with a yellow flowering plant and a cleaning sponge on the windowsill.
Two white-framed windows set in a yellow-brown brick wall; one window is larger and closed, the other is smaller and open. A metal ledge and vent are also visible.
Square window with a black frame set in a yellow brick wall; a sticker reading "Preset Windows" is on the glass, and boxes are visible inside the room.
IMG_3538
IMG_3542
Two-storey suburban house with red brick and grey cladding, large front windows, green lawn, and neatly trimmed shrubs on a clear day.
Large bay window with black frames and beige vertical blinds, overlooking a garden with shrubs, trees, and a brick wall.
Modern two-storey house with large windows, white walls, and black wooden panelling, featuring an attached garage and a driveway, surrounded by trees and greenery.
Cross-sectional view of an aluminium window frame with double-glazed insulated glass, showing internal structure and components.
A single glass door with a metal frame is partially open, shown isolated on a white background.
Cross-section view of a modern double-glazed window with an aluminium frame, showing insulation layers and internal structural components.
Cross-sectional view of an aluminium window frame with double-glazed insulated glass, showing the internal structure and sealing components.
CASEMENT FLUSH 3
A modern, black-framed window with three panels; one small top panel, one narrow side panel, and one large main panel, all with handles, set against a plain white background.
A modern, three-panel window with a dark grey frame. The left panel is tall and rectangular, while the right side features one large and one small rectangular panel stacked vertically.
A large bay window with grey frames on a brick house reveals a warmly lit room inside with plants, a lamp, a dining table, and chairs.
Modern two-storey brick house with large windows, glass balconies, and a paved drive, photographed on a cloudy day.
A brick house with a newly fitted white bay patio door and large windows, featuring grid-patterned glass panes, under construction.
A three-storey brick building with black-framed windows, a red door, and visible construction materials stacked below bay windows on the ground floor.
A brick building with a fence and grass.
Three-storey brick townhouse with white panelling, black-framed windows, a satellite dish, and a wooden fence in the foreground. Two workers in high-visibility vests are visible on the ground floor.
A white framed glass door and window set in a brick wall, with a yellow flowering plant and a cleaning sponge on the windowsill.
Two white-framed windows set in a yellow-brown brick wall; one window is larger and closed, the other is smaller and open. A metal ledge and vent are also visible.
Square window with a black frame set in a yellow brick wall; a sticker reading "Preset Windows" is on the glass, and boxes are visible inside the room.
IMG_3538
IMG_3542
Two-storey suburban house with red brick and grey cladding, large front windows, green lawn, and neatly trimmed shrubs on a clear day.
Large bay window with black frames and beige vertical blinds, overlooking a garden with shrubs, trees, and a brick wall.
Modern two-storey house with large windows, white walls, and black wooden panelling, featuring an attached garage and a driveway, surrounded by trees and greenery.
Cross-sectional view of an aluminium window frame with double-glazed insulated glass, showing internal structure and components.
A single glass door with a metal frame is partially open, shown isolated on a white background.
Cross-section view of a modern double-glazed window with an aluminium frame, showing insulation layers and internal structural components.
Cross-sectional view of an aluminium window frame with double-glazed insulated glass, showing the internal structure and sealing components.
CASEMENT FLUSH 3
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MaterialAluminium
Product typeCasement windows
SystemCortizo
Thermal Break Zone32 mm
Security CertificationPAS 24
Acoustic InsulationRw up to 45 dB
A modern, black-framed window with three panels; one small top panel, one narrow side panel, and one large main panel, all with handles, set against a plain white background.
Product mediaCortizo Casement Windows
Published strengths

What stands out on this system

  • More natural lightGlazing, sightline or large-opening details support brighter spaces.
  • Thermal comfortPublished content includes thermal, insulation or draught-control benefits.
  • Quieter roomsAcoustic or sound-reduction performance is discussed for this product.
  • SecuritySecurity hardware, locks or tested security standards are referenced.
Key documents
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