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'UK Manufacturers of Quality Aluminium Products Since 1985'

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Emperor Concealed Bi-Fold

Passes With Flying Colours!

Introducing our patented Concealed Hinge Bi-folding Doors. These doors are now tested to PAS24 for security and the low threshold option is now weather rated. These bifold doors have no unsightly hinges breaking up the clean lines of the doors. The specially engineered hinges are fully concealed when the doors are closed, resulting in a clean, tidy and contemporary look. Why not come and see them for yourself?

Find Out More

Luxury Aluminium Front Doors

Our Luxury aluminium residential front doors are one of our most exciting products here at Duration. These all aluminium doors, provide strength and security, slim lines and great looks. Using the latest technology they provide high performance and thermal efficiency.

By using the strength of aluminium these doors allow you to maximise glass area and minimise the amount of frame. Whether you live in a traditional or a contemporary home you will discover an extensive range of styles, furniture, colours, threshold options, glass and glass designs, to suit your home. Also available is a range of made-to-measure side panels, toplites and sidelites. Create a Sensational impact and a lasting impression with durations Luxury Front Doors.

Technical Specifications

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 join, and heights of up to 3000 can be achieved (subject to panel width and location). Panels can be made less than 700mm wide - please ask our technical department for advice.

The Sizes Below Apply For Single Front Doors

Recommended Sizes
Min. Width (mm)	None
Max. Width (mm)	1000
Min. Height (mm)	1655
Max. Height (mm)	2400
Max. Panel Width (mm)	900
Max. Sash Weight (Kg)	80

Sight-lines
Head / Top (mm)	110
Jamb / Side (mm)	110
Meeting Stiles (mm)	N/A
Bottom - Std Threshold (mm)	110
Std Threshold (mm)	46
Low Thresholds (mm)	13

Please Note:
See Section Identifications for more information and detailed technical drawings.

The Sizes Below Apply For Double Front Doors

Recommended Sizes
Min. Width (mm)	None
Max. Width (mm)	2000
Min. Height (mm)	1655
Max. Height (mm)	2400
Max. Panel Width (mm)	900
Max. Sash Weight (Kg)	80

Sight-lines
Head / Top (mm)	110
Jamb / Side (mm)	110
Meeting Stiles (mm)	166
Bottom - Std Threshold (mm)	110
Std Threshold Height (mm)	46
Low Thresholds Height (mm)	13

Please Note:
See Section Identifications for more information and detailed technical drawings.

Door Performance

1.8

U Value
W/M²K

600 Pa

Air
Permeability

250 Pa

Water
Tightness

1200 Pa

Wind
Resistance

Please Note: These doors can be made to PAS23, PAS24 standards upon request.

These statistics apply for:
Open in, double-glazed units, 90% argon gas filled (4mm Planitherm ONE, 4mm Planilux), 16mm or more, Swiss V warm edge spacer bar (1.1 Glass - U Value centre Pane*). Achieving air permeability class 3, water tightness meets & exceeds requirements for class 5A, wind loads class 5 and frontal deflection classification C. Weather tested in accordance with BS EN 1026, BS EN 1027 and BS EN 102211.

Specifying - Suitable Applications

Can be specified for domestic or light commercial 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.

Technical Manuals - Downloads
Section Identification (Profiles, Combinations, Sight lines)	(4.6 Mb)
Test Results (Open in weather tested to BS EN 1026, BS EN 1027, BS EN 12211)	(0.3 Mb)
Glass Safety (Where you must use safety glass and what is considered to be safety glass)	(0.1 Mb)

Having problems downloading? - Click here »

Key Profile Dimensions
Outerframe Depth (mm) ¹	47 or 70
Sash Depth (mm)	47
Glazed Sealed Units (mm)	28 (4 x 20 x 4)
Projection Cill Height - Optional (mm)	25
Head Extension - if required (mm) ²	20 or 32
Midrail - if required (mm)	109
Coupling Bar - if required (mm)	35.5

Please Note:
¹A direct fix outerframe is 70mm deep, while the subframe fix outerframe is 47mm deep.
²A direct fix outerframe has a 20mm head extension, while a subframe fix outerframe has a 32mm head extension.

Technical Drawings - Downloads

Technical drawings can be provided in DWG or DXF format, please contact us.