Inline Bifold Door / Window SovereignSeries™
...folds back inline with exterior cladding
Maximum sizes for bi-fold doors vary by width, height, wind zone, and glazing requirement. Your local Bradnam's branch will be able to advise you whether a configuration is possible or contact NALCO Technical support.
As a guide, bi-fold panels up to 2.2m by 0.85m are recommended.
This door folds back 180° in line with the building. To do so, the front of the frame must be within 20mm of the face of the exterior cladding in a recessed application.
- Bi-fold frames have optional facings ranging from 25mm, 35mm cover, or no facing.
- Provision of a 24mm glazing pocket.
- Open out frames are available only as top rolling.
- The same frame is used to fabricate the two options, which can be included in the same door, for example three panel inline and three panel standard.
- Special support fixing brackets are required in timber frame cavity construction designs for both types of doors.
Glazing, Beads and Panel Types
- A range of 11 beads are available to accommodate glazing options from 4mm to 24mm and to provide a variety of finishing styles ranging from sloped to square.
- Inline bi-fold windows and door configurations are available in two or three panels only, providing for up to six panel bi-parting.
- For bi-fold windows we recommend fully captive configurations 2 and 0, 2 and 2, or 4 and 0. We do not recommend loose panel options with an odd number of panels sliding in one direction, such as 2 and 1, 3 and 0, 4 and 1, or 3 and 2. This is because the configuration requires additional latching, which may be difficult to operate in some instances such as over a kitchen bench.
- For doors we always recommend a service panel for convenient access.
Mullions and Transoms
- A coupling bar is used for window overlights. (Recommended for standard bi-folds only).
- Vision rails are available to improve safety in high traffic areas.
An Aluvent passive ventilation enables passive ventilation to be included into bi-fold doors. Refer to the Aluvent section.
Standard range of flashings include 84mm, 71mm, 63mm, 58mm, 53mm, 48mm, 41mm, 38mm, 31mm, 25mm, and 14mm. Refer to flashings section.
Proprietary NALCO bi-fold hinge, inline hinge, and bifold roller assemblies are critical components to provide attractive visual and functional performance of doors and windows. Other considerations include multipoint locks and twin bolts.
Refer to hardware section.
Special Support Brackets
Special support fixing brackets are required in timber frame cavity construction designs for both types of doors.