Glideline GS15

Thinnest frames available!
Ultra slim 15mm aluminium frame
Hidden hardware giving sleek design
Available in 150+ RAL finishes

Glideline GS15 Sliding Doors - Thinnest Frames Available!

Transform your home with the Glideline GS15, a cutting-edge aluminium sliding door designed for modern living. With an incredibly slim 15 mm central interlock, this system offers uninterrupted views, floods interiors with natural light, and creates a sleek, minimalist aesthetic. Perfect for both contemporary extensions and stylish refurbishments, the GS15 is the ultimate choice for homeowners seeking beauty, performance, and precision.

At Ideal Glass, we bring this exceptional door to life with expert installation. As a FENSA-registered, Which? Trusted Trader and Checkatrade-approved company, we ensure every detail is handled with care, from the initial survey to the final fit. Serving Hertfordshire and North London, including St Albans, Harpenden, Stevenage, and Watford, our team delivers a smooth process and flawless results.

Why Choose the GS15?

Thinnest interlock available: just 15 mm for near-frameless views and maximum daylight.
Seamless minimalism: hidden hardware, concealed locks, and slim profiles for a clean, modern look.
Effortless operation: precision-engineered tracks and rollers ensure smooth, reliable sliding.
Energy efficient: U-values as low as 1.2 W/m²K help to improve insulation and reduce heat loss.
Quiet and comfortable: excellent acoustic performance with sound reduction up to 41 dB.

Design Options to Suit Every Home

The GS15 is as versatile as it is stylish. Choose from a wide range of layouts and customisations to create a truly bespoke feature for your home. Whether you want large panoramic openings, flush thresholds for seamless indoor-outdoor living, or a unique corner design, the GS15 can be tailored to fit.

Configurations: 2, 3, or 4-track systems, pocket and corner-opening options, and even U-shaped layouts.
Panel sizes: up to 2000 mm wide by 2500 mm high, with sash weights up to 320 kg.
Glazing: 26 mm to 30 mm double glazing options available.
Finishes: choose from standard colours, over 150 RAL shades, textured finishes, split-colour frames, wood effects, or anodised aluminium.

Built for Performance

The GS15 isn’t just about looks. It delivers excellent all-round performance, with high ratings for weather resistance, wind loading, and security. The slim frames are strong, durable, and engineered to last, while thermal and acoustic properties ensure year-round comfort. This makes it a sliding door that doesn’t compromise on practicality while still delivering unmatched style.

Expert Installation by Ideal Glass

Choosing Ideal Glass means more than just choosing a premium product—it means choosing a trusted local installer who understands your project. We provide professional advice, accurate surveys, and meticulous installation, ensuring your GS15 performs as beautifully as it looks. With fast, free remote quotations and friendly consultations, upgrading your home has never been easier.

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15mm Interlock

The GS15 features an industry-leading 15 mm central interlock, the slimmest available. Its ultra-minimalist design creates a near-frameless look, maximising natural light, opening up views to the outdoors, and enhancing any room with a bright, spacious atmosphere.

Exclusive Flush Stacking

The GS15 offers an exclusive flush stacking feature, ensuring panels align perfectly when opened. This clever design enhances the overall appearance, maximises usable space, and provides a wider, cleaner opening, making it both practical and stylish for modern living.

Hidden Frame for a Frameless Look

The hidden frame option delivers a striking near-frameless look, with almost no visible framework, creating the effect of a seamless glass wall in motion. It’s the perfect choice for contemporary properties seeking dramatic, modern sliding door design.

Fully Flush Threshold

Engineered integrated floor track creates a fully flush threshold, creating a smooth, seamless flow between indoor and outdoor spaces with full weather protection. Elegant, functional and designed for accessibility.

Thermal and Acoustic Performance

Achieving U-values as low as 1.2 W/m²K, the GS15 delivers outstanding thermal performance while meeting Building Regulations. With acoustic reduction up to 41 dB, these sliding doors keep homes warmer, quieter, and more comfortable, combining efficiency with modern style.

Multi Track Options

Available in 2, 3, or 4-track configurations, the GS15 is designed to accommodate wide openings with ease. Panels can slide left or right, offering flexibility and style for both residential properties and light commercial environments.

Ideal Glass Reviews

Ideal Glass have a fantastic reputation in the local area, we work very hard to maintain this by ensuring our customers complete satisfaction. We firmly believe that the measure of a glazing company should be its number of negative reviews, and not just its positive reviews.

At the point of writing this, and hopefully indefinately we have ZERO negative reviews. We achieve this by relentless after care, doing our utmost to make our customers happy regardless if its before, after or 5 years later than you raise a concern with Ideal Glass.

This section contains links to our reviews on external websites. Simply click on the on the logos to see our great reviews around the web.

Glideline GS15 - Slimmest Sliding Door 2025

Glideline GS15 - Flush Threshold Sliding Door

Glideline GS15 - Thinnest Sliding Door Available

Glideline GS15 - Ultra Slim Sliding Door

Ideal Glass - Which? Trusted Traders - Hertfordshire Trading Standards

Ideal Glass - St Albans Chamber of Commerce

Ideal Glass - Insurance Backed Guarantee - PWF

Ideal Glass is FENSA registered

A FENSA certificate isn’t just a nice-to-have, it’s a need-to-have. Because the certification means you’re working with a professional company that will meet two legal requirements and provide you with an important level of protection. Most people haven’t the time, knowledge or inclination to check these three things themselves. So, what are they?

A FENSA certificate is your assurance that the installer who fitted your windows or doors has complied with Building Regulations. It also means that your installation(s) will have been registered with the Local Council. These are legal requirements and proof of them is essential when selling your home.

In addition, FENSA certificates issued after 6 June, 2014 verify that the installer’s warranty is insured. Reassuring to know if anything goes wrong, and the business gets into trouble.

So remember: you’re not just asking for a FENSA certificate. You’re asking if that window or door installer you’re thinking about using is professional, will comply with Building Regs, register your installation, and offer an insured warranty.

That’s why we say the FENSA certificate is all the proof you need of a job done right.

VIEW OUR FENSA CERTIFICATE

Areas that we work

Ideal Glass work on a variety of domestic & commercial glazing projects in & throughout the South East UK.

Glideline Gs15 in Hertfordshire

Glideline Gs15 in St Albans

Glideline Gs15 in Bricket Wood

Glideline Gs15 in London Colney

Glideline Gs15 in Harpenden

Glideline Gs15 in Stevenage

Glideline Gs15 in Watford

Glideline Gs15 in Hatfield

Glideline Gs15 in Hitchin

Glideline Gs15 in London

Glideline Gs15 in Welwyn Garden City

Glideline Gs15 in Hertford