GW70 Casement Window
GW70 Casement Window
The GW70 Casement Window combines slim sightlines, high insulation, and timeless design for modern living, renovations, and new builds
Ultra slim and attractive
Excellent security and Insulation
For new build or replacements
Get your quote:
mm x mm
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
1 pane
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
Black
1. Width: Measure horizontally across the opening from edge to edge at the top, middle, and bottom. Use the smallest measurement.
2. Height: Measure vertically from top to bottom on the left, center, and right sides. Use the smallest measurement.
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Overview
Slim, Modern Profiles
Narrow sightlines allow for more glass, more light, and appeal to all property types, classic or contemporary.
High Thermal Efficiency
Highly insulated frames with excellent U Values throughout and Building Regulations compliant.
Secure, Reliable and Dependable
Perfect for dwellings and light commercial buildings, with premium locks, durable handles and designed for everyday use.
Flexible Configurations
Available as top-hung, side-hung, fixed, or shaped units—ideal for bay windows, gables, and bespoke layouts.
Tested and Secure
Certified to PAS 24 and weather-tested to Class E1200 for water tightness and Class 4 for air permeability.
Extensive Finishing Options
Choose from single or dual colours, anodised, textured, or woodgrain finishes—with multiple handle colours available.
GW70 Casement Windows — Built for Performance and Style
GW70 is designed for both residential property and modern commercial buildings. Double or triple glazed, these windows are designed to meet all types of requirements. Strong, safe, secure and fully sealed.
Choose from a slimline frame and sash combination, suitable for most installations. Alternatively a heavy-duty sash creates larger opening vents for enhanced ventilation and bigger panes of glass.
With excellent specifications and high performance, GW70 meets the needs of any window replacement or new build project.
Glideline — Expertly Made Aluminium Window Systems
Manufactured in-house, the GW70 gives you a beatuifully made window for your projects, with meticulous attention to detail and first class fit and finish. Every window is built to order to meet specific design and performance requirements, using premium-grade insulated aluminium and the highest quality locks, hardware and window components.
From simple replacements to full new-build projects, our casement window solutions provide standard casement windows, corner glazing, frameless windows, floor-to-ceiling windows and bespoke products
Support for Professionals and Homeowners
We work closely with installers, architects, and homeowners to ensure the GW70 integrates perfectly into every project. From clear technical data to CAD support and product guidance, we make it easy to specify and install.
With short lead times, flexible design options, and responsive service, the GW70 is a dependable choice across residential and commercial applications. Whether for a traditional property or a modern extension, it delivers reliable performance and contemporary style.
Options
Handle colours
Technical specifications
General
70mm frame
Maximum glass thickness 44mm
Maximum acoustic insulation 46Db
Test data
U value from 1.0 W/m2K
Air permeability (EN 12207): Class 4
Water tightness (EN 12208): Class E1200
Wind resistance (EN 12210): CE 2400
Reference 1.438 x 1.33m / 1 fixed light
Variations
Fixed panel
Area limit 8m2
Height limits 400 - 1500mm
Height limits 350 - 1500mm
Width limits 350 - 700mm
Width limits 400 - 1200mm
Side hung panel
Shaped glass – pitched corners and gable windows.
Colour Finishes
Available from Glideline
Powder Coating RAL Finish
Standard 7016M and 9005M, 9010G
Available in 150+ RAL finishes
Textured finish available
Split colour for interior/exterior
Anodized aluminium
Class 15; 15-19 micrometer coating for external use as standard
Class 20; 20-24 micrometer coating for use in aggressive conditions, industrial areas and marine pollution
Silver brushed, silver rough brushed, bright silver, matte silver, brushed steel, rough brushed steel, brushed champagne re-polished, bright gold, rough brushed inox re-polished, brushed stainless steel, rough brushed ivory re-polished, brushed bronze, rough brushed bronze and re-polished, rough brushed copper re-polished, rough brushed Bordeaux re-polished, rough brushed green, rough brushed blue re-polished, rough brushed grey re-polished, matte black
Wood effect powder coating
Available in pine, oak, cherry wood, sapele, African walnut, walnut, chestnut and white wood
Reviews
Thank you to the installers Joe and Luke for their hard work. It wasn't easy going up all the stairs but they were happy doing so and I couldn't be happier with the doors. Also Henry has been fantastic from start
Glideline installed 6 sets of sliding doors in our house. This was a major investment for us so we wanted it to be just right. David and all the team were friendly and helpful from start to finish. Henry was great.
FAQs
What U-value can these windows achieve?
The aluminium casement windows that we manufacture and supply at Glideline have been carefully designed to be highly thermally efficient. With a U-value of 1.3 W/m²K, your customer’s home will be comfortable all year round.
Where are your casement windows made?
We manufacture all of our aluminium double glazing from our Great Yarmouth base in Norfolk. Our state-of-the-art manufacturing process allows us to have total quality control over our aluminium casement windows.
How can I find your double glazing prices?
Thanks to our configurator engine, it’s easier than ever to find double glazing prices. We price all of our aluminium double-glazed products competitively without compromising quality. Get a quote for your new swinging windows today.
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