Ultraline Slim Sliding Door FAQs

Double Glazed – Each individual door panel can be a maximum of 4.2 m wide and 3.2 m high (without exceeding 9 sqm per panel).

Triple Glazed – Each individual door panel can be a maximum of 2.7 m wide and 3.2 m high (without exceeding 5.4 sqm per panel).

Yes, Ultraline offer both a pocket door option, where the door opens into a cavity pocket created within the wall, and an open corner configuration, where the two doors meet at the corner, leaving a completely open space when opened. You can even combine the two together and have both an open corner and a pocket door in one.

Learn more about pocket doors and open-corner configurations.

Yes, you can.

Learn more about glass-to-glass corner windows.

Yes, you can. The flush track with integrated drainage comes as standard. Allowing for a seamless transition between inside and out.

The Ultraline Slim Sliding door is available in four different colours:

• Brushed Platinum (Anodised)
• RAL 7016 Matt Anthracite Grey (PPC)
• RAL 7021 Matt Black Grey (PPC)
• RAL 9005 Matt Jet Black (PPC)

All of the doors are finished to a marine-grade standard (60 microns). This is essential for properties located within three miles of a coastal location to protect the frames from the harsh elements and ensure longevity.

All polyester powder coated (PPC) colours are Matt at 30% gloss level.

There are two different glass specs in either double or triple glazing, standard and solar control.

The standard double-glazed units are high-performance, low-E coated, argon-filled units with black warm-edge composite spacer bars.

The solar control glass will reflect and filter the sun’s rays, allowing natural daylight into the room while reducing glare and heat gain, creating a comfortable internal environment.

Both glass options are made with toughened safety glass.

Read the full Ultraline Glass Specification list.

Ultraline offer a 10-year manufacturer’s warranty, which covers defects in the surface finish, glass, and mechanical parts (including electrical locks, keeps and hinges).

Installations within 3 miles of a body of salt water i.e. coastal locations or estuaries, are also covered by the warranty, as long as a maintenance plan with a log is adhered to.

Full details of the warranty Ultraline offers can be downloaded from the Aftersales care portal.

The Ultraline Slim Sliding Door’s advanced design and engineering offer a 20mm sight line throughout the visible system when installed. One of the slimmest sliding doors available.

The centre interlock has a sight-line of 20mm, with the side/head of the outer frame being 50mm. However, when installed, 40mm of the outer frames are concealed, meaning that only 20mm of the frame all the way around is visible, allowing you to create perfect symmetry.

Due to the slim sight lines of the Ultraline Slim Sliding Door, it is not possible to have trickle vents.

However, it is possible to lock the door in a semi-open position of 100mm, to ventilate the room without compromising on security.

The Ultraline Slim Sliding Door is PAS 24:2016 accredited, thanks to the robustness and strength of the locking system.

Read the full Ultraline Slim Sliding Door PAS 24:2016 accreditation report.

The WinMark certificate for Enhanced Security Performance of Doors PAS 24:2016 can be downloaded below.

The lock is a stainless steel solenoid bolt, operated by a Niko Home Control switch. The lock can be easily integrated with a smart home system.

The doors are also Document Q compliant when specified with laminated glass. Document Q is a building regulation which applies to new builds, intended to ensure that all entry points to a property provide a certain level of security against intruders.

The solenoid bolt lock is simple to wire in – very similar to a light switch. Technical details with wiring instructions can be found here.

The bolt is operated by a Niko Home Control switch and can be integrated into a smart home technology system.

If you find that your Ultraline Slim Sliding Door won’t lock, there is a manual override. Please also follow these troubleshooting tips, to help identify the issue.

The electric lock is operated by a Niko Home Control switch, which can be integrated into a smart home technology system.

The installation guide for the Niko smart hub can be found here. If you are using a different smart hub, we would recommend consulting your smart home system’s installation guide, as the installation of each smart home system will be different.

Weather performance testing is a method used to determine if windows and doors meet specific weather-resistant requirements, set out in British Standards and/or European Standards.

Weather testing for windows and doors includes:

• Air Permeability
• Water Tightness
• Wind Resistance

The tests show how effective the windows and doors are as a barrier against the weather.

The Ultraline slim sliding door has been independently tested. The completed report can be found here. As well as a Durability Test Report and CE Marking report, which can be downloaded below.

The Ultraline Slim Sliding Door is available with double or triple glazing, allowing it to achieve an impressive U-value of just 0.73 W/m2k with the latter.

When installed with double glazing, it can still achieve a very respectable 1.17 W/m2k. Its ability to combine high thermal performance with its beautiful modern aesthetics makes it a fantastic choice for those who don’t want to compromise their visual finish for high performance.

For more details of the external patio finishes available with the Ultraline Slim Sliding Door, please follow the link below, where you’ll find detailed drawings and helpful videos showcasing the external patio finishes available.