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

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 / Top	120mm
Jamb / Side	120mm
Locking Jamb / Side	122.5mm
Meeting Stiles	135mm
Bottom - With Std. Threshold	120mm
Bottom - With Low Threshold	n/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.