020 341 10038/ 01768 254552/ projects@thefenestrationnetwork.co.uk

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  • Supply and Install
  • Request a Quote
  • Our Aluminium Products
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  • Locations
  • Window and Door Systems
  • Glazing Maintenance Plans
  • Product Reviews
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GW70 Cortizo Windows | Premium Slimline Aluminium Windows UK | The Fenestration Network

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

UK WIDE GLAZING SUPPLY AND INSTALL - CALL US - 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS

GW70 Cortizo Windows | Premium Slimline Aluminium Windows UK - national supply, survey and installation

Call us: 020 341 10038 | 01768 254552
Email: projects@thefenestrationnetwork.co.uk


The GW70 (Cortizo) window system is a premium slimline aluminium window solution offering outstanding thermal performance, minimal sightlines, and modern architectural styling. Ideal for high-end residential and commercial projects where sleek aesthetics and high efficiency are essential.

What Are GW70 Cortizo Windows?

GW70 is a high-performance 70mm aluminium window system developed around Cortizo's engineering principles. It delivers slimline profiles, superb insulation values, and outstanding durability — making it a superb choice for design-led builds and renovations.


Whether you're upgrading a contemporary home, adding a glass extension, or specifying windows for a new build, this system offers a clean, modern finish with a superior feel.

Call us to discuss your project

Key Features & Technical Summary

Frame depth - 70mm slimline system


Sightlines - Minimal frame, large glazed area


Thermal performance - Low U-values (dependent on glazing spec)


Glazing options - Double, triple, acoustic, solar control


Security - PAS 24 compatible / multi-point locking


Colour finishes - 150+ RAL colours, dual colour available


Opening types - Casement, tilt & turn, fixed, large picture windows


Design style - Contemporary slimline aluminium

Email us to discuss your project

Why Choose GW70 Cortizo Windows?

  • Architectural slim sightlines for maximum glass
     
  • Outstanding thermal efficiency (better energy retention)
     
  • Sturdy & long-lasting aluminium build
     
  • Ideal for modern builds and premium installations
     
  • Noise reduction options for urban properties
     
  • Flexible configurations and large-format glazing
     
  • Dual colour options for interior/exterior contrast
     
  • Seamless pairing with Cortizo sliding and door systems

Where These Windows Work Best

The GW70 system is perfect for:

  • Modern & contemporary homes
     
  • Extensions and open-plan renovations
     
  • Coastal / exposed locations needing durability
     
  • Urban homes benefiting from slimline aesthetic
     
  • High-end self-build projects
     
  • Architectural new-build developments

Call us to discuss your project

Supply & Installation (Nationwide)

We offer a complete service:


  1. Survey & specification
     
  2. Design advice (sizes, glazing, finish options)
     
  3. Bespoke manufacturing
     
  4. Full installation by specialist fitters
     
  5. Aftercare & warranty
     

We can also coordinate with your architect, builder or structural contractor for larger projects.

GW-70 Windows — Supplied & Installed Across the UK

We supply and install the GW-70 aluminium window system by Cortizo nationwide. Whether you’re upgrading windows for better thermal efficiency, replacing for aesthetics, or specifying for a new build, our installation teams cover all major UK regions with care, expertise and full service support.

South & South East
GW-70 Windows London, Kent, Surrey, Sussex, Hampshire, Southampton, Home Counties and Essex.
From modern townhouses in London to coastal homes in Sussex and countryside retreats in the Home Counties, our South & South East team deliver full-service supply, installation and after-care.


South West & West
GW-70 Windows Devon, Bristol and Gloucester.
In the South West region we support both period home replacements and contemporary aluminium window installs, ensuring the GW-70 system meets the highest performance and finish standards.


Midlands & Central
GW-70 Windows Birmingham, The Midlands, Northamptonshire, Nottinghamshire, Leicestershire, Derbyshire and Lincolnshire.
Our Midlands network provides efficient lead-times, detailed surveys and professional installation of the GW-70 system across domestic and commercial projects.


North West
GW-70 Windows Greater Manchester, Manchester, Lancashire, Liverpool, Cheshire, Cumbria and Carlisle.
From city apartments to countryside homes, we supply and fit the GW-70 system with regional expertise and full warranty support across the North West.


Yorkshire & North East
GW-70 Windows Yorkshire, Newcastle and the North East.


Whether you’re renovating a property in Yorkshire or fitting windows in the North East region, our team installs the GW-70 system with full specification options, high-end finishes and professional service.

SUPPLY AND INSTALLATION ACROSS THE UK | REQUEST YOUR FREE QUOTE TODAY

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The Fenestration network

Ready to Transform Your Property?
If you’re looking for GW-70 Windows to be supplied and installed in your region, contact us today for a free site survey and quote. Our team will walk you through sizing, configuration (casement, tilt & turn, shaped options), colour finishes, hardware choices and installation timeline.

projects@thefenestrationnetwork.co.uk 020 341 10038 South of England 01768 254552 Rest of UK

Related Systems & Matching Products

  • Cortizo sliding systems (COR Vision / GS20)
     
  • Slimline aluminium bifolding doors for matching performance

WHAT CUSTOMERS NATIONWIDE THINK OF US:

PUTTING YOUR MIND AT EASE...

PAS 24

A British Standard that specifies the security performance requirements for doors and windows

the official police security initiative that works to improve the security of buildings and their immediate surroundings

A British Standard that specifies the security performance requirements for doors and windows

Manufactured in the UK

quality glazing products, manufactured right here in the UK

the official police security initiative that works to improve the security of buildings and their immediate surroundings

A British Standard that specifies the security performance requirements for doors and windows

request a quote
Secured by Design

the official police security initiative that works to improve the security of buildings and their immediate surroundings

the official police security initiative that works to improve the security of buildings and their immediate surroundings

the official police security initiative that works to improve the security of buildings and their immediate surroundings

Professional experts on hand to guide you through your Glazing project

National Reach - Email us for a quote
Map of UK

WHICH REGIONS DO WE COVER?

The Fenestration Network are Nationwide Supply and Installation experts in:


Bi Folding Doors/ Sliding Doors/ Entrance Doors/ Windows/ Garden Studios, Glass Balustrades, Orangeries.


Our teams have over 35 years experience supplying and installing quality Glazing products across the UK. We have teams of Surveyors, Installers and Technical Experts close to you to help guide you through your project.


We cover all regions on this map with our professional and highly skilled , local surveyors and installers.


020 341 10038 - South

01768 254552 - Rest of UK

projects@thefenestrationnetwork.co.uk

email us for a quote

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

CALL US ON 020 341 10038/ 01768 254552 ALUMINIUM WINDOWS & DOORS SUPPLY AND INSTALL UK

  • Supply and Install
  • Request a Quote
  • Our Aluminium Products
  • Book Design Consultation
  • Locations
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  • Glazing Maintenance Plans
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  • AB-38 Slimline Bifolds
  • AD-55 Heritage FrenchDoor
  • AB-60 bifold doors Review
  • AW-47 Heritage Window
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  • Aluspace Internal Doors
  • Our White Glove Service
  • Featured Projects

The Fenestration Network

projects@thefenestrationnetwork.co.uk

01768 254552/ 020 341 10038

Copyright © 2023 The Fenestration Network - All Rights Reserved. The Fenestration Network is a trading style of Evans Sales Group Ltd. All insurances are available to view upon request. 


We aren't CPS scheme registered ourselves but a lot of our installers are. If you require a CPS sign off please let us know at quoting stage and we can add this in to the quote. If you don't ask us for CPS sign off then it is expected that you will arrange yourselves with building control at your local council.

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