GT70 Tilt & Turn
GT70 Tilt & Turn
The GT70 delivers a refined 66mm sightline within a 70mm frame, engineered for large-format glazing with sash heights up to 3.5m and weights up to 160kg.
Inward opening as standard, it features a fully concealed handle for a seamless appearance and can be configured for tilt-only ventilation.
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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
66mm Visible Sightline
The slimmest outer frame in a UK tilt and turn window for a minimalist look and most natural light.
Tilt & Turn Function
Provides secure ventilation with the tilt mode, and full access for cleaning in the turn position.
Inward-Opening Design
Ideal for upper floors and tight external spaces, with easy access for cleaning and maintenance.
Hidden Handle
GT70 integrates a fully concealed handle and hidden hinges, creating the clean appearance of a fixed pane.
Thermal and Acoustic Performance
U-values from 1.2 W/m²K and acoustic insulation up to 46dB offer year-round comfort and quiet.
Flexible Sizes and Configurations
Available in single or multi-panel layouts with transoms, mullions, and fixed glazed sections.
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GT70 Tilt and Turn — Minimal Framing, Maximum Flexibility
The GT70 offers a strikingly slim aesthetic, designed as a minimalist modern window. It is ideal for projects where light, clarity, and contemporary styling are key. The inward-opening function supports secure ventilation while maintaining clean lines and minimal hardware on view
From single sash windows to more complex arrangements with fixed lights or transoms, the GT70 adapts to a wide variety of interior layouts. It’s equally suited to residential settings or commercial developments where design and functionality must work together seamlessly.
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Concealed handle and hidden hinges for a seamless, fixed-pane appearance.
GT70 integrates a fully concealed handle and hidden hinges, creating the clean appearance of a fixed pane. With no visible hardware internally or externally, the design preserves visual simplicity, reinforcing the window’s minimalist aesthetic and refined architectural presence.
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Expertly Engineered by Glideline
Every GT70 window is manufactured by us, using premium-grade aluminium, quality glass and advanced manufacturing processes, quality checked at every stage. Designed with performance and appearance in mind, the system is precision-built for a smooth, reliable operation and a refined architectural finish.
Arguably, the UK's slimmest and best tilt and turn window, GT70 is available at competitive prices and help you complete your project on time and in full.
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Service and Support for Modern Window Projects
Glideline supports trade professionals, architects, and developers with clear technical data, installation guidance, and responsive service throughout the design and delivery process. Whether you need CAD details, glazing specifications, or advice on the best configuration, we’re here to help.
With short lead times, flexible colour options, and expert knowledge of aluminium systems, we help ensure your GT70 windows are delivered to specification and on time. It’s a modern, dependable solution for today’s architectural window requirements.
Options
Handle colours
Technical specifications
General
Width limits 620 - 1300mm
Height limits 700 - 3500mm
Maximum panel weight 160kg
Maximum glazing thickness 40mm
Inward opening
Test data
Uw 1.2 (W/m2K) Double glazed
Maximum acoustic insulation 46Db
Air permeability (EN 12207): Class 4*
Water tightness (EN 12208): E1650*
Wind resistance (EN 12210): Class C5*
*Reference test 1.23 x 1.48m 1 sash
Variations
Multiple panels allowed with transoms and mullion
Open left or right
Fixed panel
- Area limit 8m2
- Height limits 300 – 3000mm
Width limits 400 - 1200mm
Width limits 300 – 3000mm
Colour Finishes
Available from Glideline
Powder Coating RAL Finish
Standard 7016M and 9005M, 9016G
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
The engineering behind the tilt and turn product really stands out. Tight tolerances, beautiful sightlines, and hidden hardware. Installed by one of their approved partners who clearly knew the system inside out. The end result is stunning.
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 1.2 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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