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Opal Definitive

Smooth sliding, aluminium bi-folding doors

As Seen On Channel 4’s Old House, New House

Opal Definitive Bi-fold Doors

Open your room up to the outdoors

Opal Definitive doors are an ideal alternative to patio doors, allowing you to instantly open up a room to your surroundings. Opal Bi-folding Doors allow you to enjoy maximum daylight with large, thermally efficient glass panels, perfect for extended home living and refurbishment projects.

Smooth sliding bi-fold doors

With slim aluminium frames and large double or triple glazed panels, Opal Doors offer a range of modern features, making them the new popular choice for homeowners and contemporary home living.

Slimline design

The slimline aluminium design allows for maximum daylight with minimum framework and stylish home living.

Modern Colours

The Opal colour palette ranges from stylish greys to stand-out colours, we can colour match for your desired look.

Thermally efficient

Aluminium doors are thermally broken so exceed all u-value targets and reduce condensation in the room.

Double or triple glazing

We can provide double and triple glazing options for your doors, keeping your home safe and warm.

As seen on Channel 4

Our stunning Opal collection was featured on Channel 4’s “Old House, New Home” to help transform an older house into a new modern home. Our Opal Living windows and Opal Definitive bi-folding doors were chosen to let plenty of light into the home and provide a stylish, slimline design.

“Unbelievable how they turned out and great quality too!”

– Chev Walker, Channel 4’s Old House, New Home

Get instant online pricing

Trade customers can now get instant online pricing for our Opal bi-fold door collection and Opal rooflights. Get an instant price on the go with our app.


Opal Definitive smooth sliding bi-folding doors are an ideal alternative to patio doors and suitable for both residential and commercial applications. With a smooth sliding operation, these bi-folds slide effortlessly due to bottom fitted dual rollers running on a dual track.

Opal Definitive also offers a choice of opening configurations to suit any application. You can choose to fold the sashes internally or externally to maximise living space. You can place the door opening at the side or at one end to create a single entrance door for easy access, or in the middle for a double door.

  • Suitable for Residential, Commercial, Retail
  • Thermally broken system
  • Steel rollers as standard
  • Hardware & security upgrades
  • PAS 24:2012 available on request
  • Document L compliant
  • Online pricing app available


Typical Sightline 132mm
(U-Value) 1.5 W/M2K
Max. Overall height 2500mm per sash
Max. Overall Width 1200mm per sash
Frame Width 102.5mm
Frame Depth 70mm
Maximum Sash Weight 100kg
Double or Triple Glazing 24, 28, 34, 36 or 38mm
Applications Residential, Commercial, Retail

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