OPT100 sliding folding doors

The top of the range OPT100 is a long standing premium folding door system and uses German engineering expertise to give the user exceptional performance and aesthetics. It has very slim sight-lines, excellent U-values, top quality components and also has features not available in many other systems, including sliding corner posts and faceted tracks to open up curved walls. These doors are engineered to a very high standard, with more options than you will usually find available. They are completely bespoke to you and would certainly add the ‘Wow’ factor to your home!



The OPT100 bi-folding door system has many features and benefits which make it one of the most capable bifold doors available on the market.

Key features

Panel widths up to 1100mm
Door sets can be manufactured up to 2800mm high
Rounded and square frame profiles available
Capable of filling large openings, over 12 metres
Visible sight-line between panes of glass (the frame size) is only 100mm – make the most of your view!
Choice of panel arrangements – odd numbers include pass doors for easy everyday access
Low threshold options for seamless transition from inside to outside.
Multi-point locking and flat intermediate handles
Handles are colour-matched to the frames for no additional cost
Intermediate panels are available with key locking handles
Fully adjustable jambs (side frames) make this system easy to adjust, even when fitting on straps. They can even be straightforwardly adjusted after building settlement and years of use.
Sprung loaded jambs are included on at least 1 side of the opening (both sides for larger door sets). These jambs ensure the tightest possible fit of the panels within the frame when they are closed. The ‘spring’ accommodates the natural expansion & contraction of the aluminium frames through the seasons, therefore ensuring the doors always give fantastic protection against the elements.
Fully finger safe gaskets  – so even if your child reaches into the folding door with their entire hand and it is completely closed, injury is prevented
Swiss running gear ensures an exceptionally quiet operation.

Bi folding door options available

Full range of RAL colours available
Dual colour option
Option for metallic textured finish.
Suitable for manual, solar and electric in-glazed blinds.
Option with or without external sill
External sills available in 150mm, or 180mm
Handles available colour matched, or black, white, and silver anodised
Rounded or square frame profiles available
Sliding corner posts available
Faceted openings available to create curved walls
Full selection of matching windows also available

We have a variety of bi-folding door systems available to suit different applications and also budgets. You can see the full selection on our Folding Doors page.

Remember that we are Certass registered and offer an IWA deposit & guarantee protection on our supply and install contracts. This gives our customers independent protection for their peace of mind. You can read more about both of these organisations on their websites – IWA Insurance and Certass