Superior Overheight Doors

Product Description

Superior Doors: UNI Doors, Adaptive Solutions for Architectural Versatility

When your project demands over-height interior doors, Superior Doors is your trusted partner for quick, customizable solutions. Our 2200mm Uni and 2400mm Uni doors are in stock and ready for immediate delivery, offering the flexibility to adapt to any architectural vision.

Our UNI doors are meticulously crafted with an oversized pine rail at the top and bottom, providing the versatility to cut them down to any size between 2200mm and 1980mm (2200Uni) and 2400mm and 2200mm (2400Uni). This adaptability ensures a perfect fit for a variety of architectural spaces, from soaring ceilings to grand entrances.

Superior Doors' UNI doors serve as a blank canvas for architectural creativity, enabling architects to express their unique vision and create truly distinctive entryways. Whether you envision a grooved UNI door with a bold, contemporary pattern or a vision-panelled UNI door that seamlessly blends with the surrounding décor, the possibilities are endless. Moreover, these doors are engineered to be lighter, stronger, and more durable than conventional options, ensuring long-lasting performance and enhanced functionality.

If you are looking for an oversized interior door that is both stylish and functional, Superior Doors is the perfect choice. We offer a wide variety of UNI doors in a variety of materials and finishes to meet your needs. Contact us today to learn more about our UNI interior doors.

Core Options

When customizing our UNI doors, it's essential to maintain the centred position of the door lock block. By removing an equal amount from both ends during the cutting process, you can guarantee a seamless installation and preserve the door's structural integrity.

Expanded Polystyrene (EPS) Solid Core

Superior Doors provides the option of a premium High-Density Solid EPS Polystyrene Core, made from fire-resistant EPS. Solid EPS cores offer the best in thermal insulation, providing an R-value that is significantly higher than H1 minimums nationwide. Comprehensive R-Value information may be found in the Superior Doors H1 Guide. Solid EPS Cores have almost 100% glue contact area, giving them resistance to delamination, as well as excellent durability and strength. Superior Doors' Solid EPS cores are certified low VOC, making them an elegant solution for a huge variety of applications.


RibCore is Superior Doors’ cost-effective alternative for a durable, thermally insulative and lightweight interior door. RibCore doors have up to 42% glue adhesion between the core and the door skin, while traditional honeycomb paper core - used by most other manufacturers - has about 4% glued contact between the door skin and the core. RibCore is a low VOC option, what this means is simple, a strong door that can easily absorb what life throws at it without delaminating, bending or bowing.

Moisture Resistant (MR) Particleboard Core

For a door that needs a significant amount of hardware, or improved acoustic performance, a Solid Moisture Resistant Particleboard core is an excellent option. Superior Doors' Moisture Resistant Particleboard Cores are FSC-certified materials, and are low VOC, making them the perfect option for environmentally forward projects. Solid Moisture Resistant Particleboard cores additionally boast up to 100% glue contact area, giving them resistance to delamination, and enhancing the existing strength of the core. For those who require a door with maximum impact resistance, the MR Particle Board solid core option is the perfect choice. The MR Particle Board Core is more moisture-resistant than standard particle board and is the ultimate core option for strength and durability.

Grooving Options

Superior Doors over a broad range of styles of grooved doors, from a classic Avon to a contemporary Coastland, there is something to suit every need.
Superior Doors also offer custom grooving, providing unmatched versatility, precision and detail, and the best solution for your innovative, bespoke builds.
Matching groove designs to vision panels, bespoke or otherwise, is also a service offered by Superior Doors, to ensure you get a cohesive, attractive finish.

Grooving profiles

• 3mm U-Groove
The U-Groove profile is suitable for any skin thickness, on any door size
• 4mm Square Groove
The 4mm Square Groove is suitable for any skin thickness, on any door size. 4mm is the minimum requirement for any door with steel reinforcement
• 6mm V-Groove
The 6mm V-Groove is suitable for skin thickness 4mm and up, on any door size. This is the recommended option for a joinery look
• 6mm, 8mm, 10mm & 20mm Square Groove
Suitable on skin thicknesses 4mm and up, up to 1980mm wide, and up to 4000mm high
• 10mm Tapered Square Groove
Suitable on skin thicknesses 4mm and up, up to 1980mm wide and 4000mm high

Skin Options

Superior Doors offers a range of skin thicknesses to suit all situations and needs.  Thicker door skins increase strength and durability, allow for deeper, more substantial grooving and reduce component show-through for a flatter, higher-quality finish.
• 3mm
• 4mm
• 4.75mm
• 6mm
• 9mm
All MDF skins are made from sustainably sourced, FSC-certified materials, and are pre-sealed with a low VOC, moisture-resistant sealer. 

Steel Reinforcement Options

Steel reinforcement is necessary for barn doors, and cavity, wardrobe and surface sliders, as well as in areas where the door may be exposed to an ambient temperature difference, a change in moisture content, or direct sunlight. A single box section is typical on the lockblock edge for hung doors, to ensure no sagging of the door over time, and two - one on the lockblock edge and one on the other - is considered typical for slider applications. To learn more about what kind of steel reinforcement may suit your needs, visit our website at, or contact the Superior Doors team at [email protected]. Steel Reinforcement is not suitable for a RibCore door, this is to prevent show-through of the internal components – is a steel reinforcement is necessary in your door, EPS Solid Core or MR Particleboard are suitable choices.