Bi-fold Doors Trade Prices
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Emperor Concealed Hinge Aluminium Bi-fold Doors Technical Page

All of our Bi-folding doors are fully assembled and tested in the factory jigs prior to despatch.

They are photographed up to 28 times to ensure they reach you in perfect working condition.

These photographs are then put into every accessory box that is sent out that is sent out with our fitters.

Emperor Bi-fold Quality Control

We believe that the best way to make sure that every single one of our Bi-fold doors arrives to you in an excellent working condition, is to check them thoroughly before they leave the factory. Each Bi-fold door therefore that leaves the factory is checked by Quality Control; for more details see our Quality Control page.

Emperor Bi-folding Door Performance

U Value

Emperor Bi-folding Doors Specifying - Suitable Applications

  • Can be specified for residential / domestic applications.
  • Meets building regulations for new build. (For Oct 2010)
  • Meets building regulations for replacement and refurbishment projects. (For Oct 2010)
  • Standard threshold; suitable for use on the ground floor up to second floor. (Recommended fully weather rated threshold).
  • Low threshold options; suitable for use on the ground floor only, not recommended for properties situated by the coast or installed in exposed locations.

Emperor Bi-folds Sight-lines

Head / Top120mm
Jamb / Side120mm
Locking Jamb / Side122.5mm
Meeting Stiles135mm
Bottom - With Std. Threshold120mm
Bottom - With Low Thresholdn/a

Please Note: The details for the bottom sight-lines and step height are the optimum / best case scenario for open out doors that have been sunk / dropped into the floor.

The sizes detailed below are for guidance only; maximum widths can vary depending on your chosen height and vice versa. Widths wider than 6250 can be achieved with a mechanical joint to head and threshold sections. Panels can be made less than 700mm wide - please ask our technical department for advice.

Emperor Bi-folds Recommended Sizes

Minimum Width1400mm
Maximum Width6000mm
Minimum Height1600mm
Maximum Height2400mm
Maximum Panel Width1000mm
Maximum Weight70kg

Please Be Advised: since these doors are just a prototype and are still in the testing phase - this information is still open to change.

Emperor Bi-fold Door Key Profile Dimensions

Outer Frame Depth 75.5mm
Sash Depth75.5mm
Glazed Sealed Units28mm
Projection Cill Height - Optional25mm
Head Extension - Optional43mm
Transom / Mullion - if RequiredTBA

Emperor Bi-fold Number of Door Panels

No of Door Panels 2 3 4 5 6 7 8+
Minimum Width (mm) 1400 2100 2800 3500 4200 4900 Please ask
Maximum Width (mm) 2000 3000 4000 5000 6000 7000 Please ask

Please remember all sizes are for guidance only and are subject to location of the fitted product. Please contact us for more information.