Aluminium bi-folding doors with slim sight lines of just 132mm
These affordable quality aluminium frame doors have been designed to use the maximum amount of glass with the result that they provide panoramic views and flood your living space with natural light. If your room is currently a little bland and dingy, Visofold 1000 aluminium bi-folding doors will transform it into bright inviting modern space, perfect for living in and entertaining.
Our Visofold 1000 aluminium bifold doors won’t let you down. We use only high quality hardware which provides an easy smooth sliding action that will be retained for many years to come.
These bifolds are available in a wide range of colours and finishes, including textured paint, selected to add to the style of your home. When open, over 90% of the open area is clear; ideal for making your garden part of your living space.
- Low weather rated thresholds are available.
- Slim aluminium profiles with polyamide thermal break.
- High security shoots bolts – all intermediate panels have high security shoot bolts to retain the doors in place.
- Each intermediate panel features an internal pendulum handle for outside access.
- High security multi-point locks are standard. These include hook locks for extra security.
- State of art PAS-24 Secured by Design certified s locking cylinders are used for advanced security.
- Better than Building Regulations requirements performance on all our doors.
- Quality steel bogie wheel assemblies and tracks provide smooth easy opening and closing and perfect operation.
- Colour matched aluminium quad trim is available.
Visofold 1000 Bi-folding Doors come with a polyester powder-coat paint which is baked onto the aluminium. This means that it will last and look just as good in years to come as it does on installation. All it needs is an occasional wipe down with a sponge. The finish is guaranteed for ten years.
These bi-folding doors are available in white, our extensive colour range, and textured and structural finishes including wood, metallic, and silver anodised. There are over 200 finishes to choose from and you can even select the dual colour option with different colours on the outside and internally.
There is a wide range of glass options. Standard double glazed units incorporate toughened Low-E safety glass sealed units. These are 90% argon gas filled and have a warm edge spacer-bar. The U-value is 1.2 W/M²K.
Doors can be supplied unglazed allowing you to source your glass from another supplier. Bear in mind that you will need to comply with building Regulations if you choose this option.
Staycool Solar Glazing
We can now fit Staycool solar glazing to all our aluminium sliding and folding doors. Not only does this protect you from direct heat from the sun and reflects glare, in the winter it provides you with the benefits of a 1.1 U-value thus maximising the amount of heat that is retained.
This leading edge glass technology reflects over half (57%) of direct solar heat and reduces glare by 35%. This is achieved without using coloured glass, a major benefit. It also means that your furnishings and flooring will enjoy increased protection from discolouration and fading.
Better than Regulations U-value
Current regulations stipulate a maximum U-value of 1.8, but our Staycool double glazing units beat this by a considerable margin. In fact measurements have shown that our double glazing units achieve U-values of 1.5. Note that the overall U-value of the bifold doors depends on a number of factors other than the double glazing units.
We are also able to achieve even better U-values with optional glazing specifications. For instance we can offer triple glazing and Krypton glass. These incur additional cost, so please contact us for prices.
Security is important, and we take security design seriously. Our doors are designed to give you the level of security we believe you deserve and we always strive to better standard security requirements.
Our security features include:
This is used as standard for traffic doors, which need to be highly secure. The mechanism has six locking points and is activated by a lever-lever handle. There are two deep throw hook locks which engage into the outer frame. These prevent the door from being pulled open when the intermediate shoot bolts aren’t engaged. Additionally there are a standard latch and a dead bolt. Adjustable rollers ensure that the doors are pulled in tightly for good weathering performance.
For arrangements that have double traffic doors, these are configured as a master door and a slave door. The master door locks as described above, with the slave door having additional top and bottom shoot bolts that are engaged by a pendulum handle.
The weakest part of traditional locking systems is the cylinder. This is vulnerable to picking, bumping, and drilling as routinely practiced by burglars. However our high security cylinders use state of art technology that is resistant to these. They have passed the PAS024 test stipulated by BSI & Secured by Design.
The intermediate handles can be locked by a key. This serves the same function as window locks, adding an additional layer of security. All intermediate handles can use the same key, though a separate key is needed for traffic doors.
These secure the door at the top and bottom of the intermediate panels. They are operated by the pendulum handle. They are chamfered for ease of use and give a very tight fit which protects against forced entry while providing excellent weather performance.
Fitted to the top and bottom of the outer frame channel, these provide increased security and consistent operation. They protect against forced entry using a jemmy or crowbar as they eliminate any possible leverage point. They also help maintain smooth operation of your doors.
Our standard glazing is toughened safety glass and sealed units are installed internally. We use high security beading to provide additional security. As the sealed units can only be removed internally, they are secure against forced entry from outside.
We are also able to supply 6 mm laminated glass units for additional security as an optional extra.
There are a number of handle options for traffic doors and intermediate doors. These include our Pendulum and Pendulum Nouveau handles which are available for intermediate panels and traffic doors. There is also the option for outside access which removes the requirement for a traffic door.
Handles are available in a range of colours.
Traffic Door Handle
For configurations that include a traffic door you can choose a lever-lever handle. Functional and easy to use, these give easy access. They include high security locking cylinders and multi-point locking.
Intermediate Door Handles
Intermediate panels feature our Pendulum handle. This classic design is sleek and elegant. You can also choose the Pendulum handle for traffic doors. It is sufficiently strong and robust for opening and closing the doors on its own, eliminating the need for extra D-handles. Locking action is provided by shoot bolts and the handles are locked using a key.
D-handles are optional. Fitted to the inside of doors they make pulling and sliding easier by providing a strong hand hold. While not necessary, some people will find them beneficial. They fit at the position of the hinge.
Hinges & Bogie Wheel Assemblies
The doors incorporate four wheel bogie assemblies. These move on twin stainless steel tracks; the combination providing graceful and easy and opening and closing. The full weight of the doors is supported giving a beautiful sliding action.
Additional security and stability is provided by a dedicated guide running inside the outer frame.
Traffic Door Buffer Magnets
There is the option to fit high strength buffer magnets to traffic doors. These secure the doors to the adjacent intermediate panel keeping them open. It also stops the traffic door handles hitting the intermediate panels.
Bifold Doors Configurations
|Minimum Door Width (incl outerframe)||1650mm|
|Maximum Door Width (incl outerframe)||7200mm*|
|Minimum sash width||750mm|
|Maximum sash width||1200mm|
|Maximum sash weight||100kg|
|Maximum Door Height||2500mm**|
*Doors are available wider than 6 metres on request.
**Maximum height dependant on installation location.
|U Value||1.5W/m²K using 1.0 W/m²K|
|Air||Class 4, 600Pa|
|Class E, 750Pa||Class E, 750Pa|
|Wind||Class 4, 1800Pa|
|Document L Compliant||Yes|
The required weather performance of windows and doors is stipulated by BS 6375: Part 1: 2009. Our bi-folding doors comply with all aspects of these regulations including wind resistance, water tightness, and permeability. We are able to provide a copy of the test results on request.
Bifold door sightlines
Bifold door sightlines are the width of the frame, and modern construction methods and materials have allowed us to reduce the sightlines to provide an improved look and feeling of space. The sightline of panels that move in the same direction is just 132 mm, and in the case of a traffic door meeting a folding sliding panel it is just 179 mm. Where there are connected meeting stiles the sightline is 216 mm.
Integrated Trickle Vents
Trickle vents are small openings in doors and windows that permit a limited amount of ventilation of the space when the doors and windows are closed. These are now compulsory throughout UK and Europe for all naturally ventilated spaces. Their benefits include a reduced risk of condensation, minimum ventilation to reduce heat loss, and the avoidance of drafts.
Trickle vents are mounted on the surface of thin aluminium bifold doors, and although they provide many benefits the downside is they are unappealing aesthetically. However by clever design we can now offer an exclusive frame extender to our Visofold 1000 bifold doors which conceals the trickle vents from view. The effect is that the slim lines of our folding sliding doors are maintained. The door design includes a weather drip which improves overall performance.