The main feature of Bi-fold Patio doors is the way they open they concertina (fold) to the sides of the frames leaving a huge clear space.
The leaves of the doors themselves move on tracks and can be stacked to either left, right, inside or outside the frames thereby allowing maximum versatility (all the doors can open left or right or they can open in the middle and slide to the sides).
In terms of movement, even though there is a considerable amount of glass, the track systems at both top and bottom ensure the doors do not de-rail and can be maneuvered into position quite easily.
You can even find designs with concealed hinges & recessed handles, giving an even sleeker appearance.
For the sake of safety and energy efficiency, these bi-fold patio doors should be fitted with either laminated or toughened safety glass (see building regulations).
The safety glass will ensure that in the event of an accidental breakage there are no sharp pieces to cause injury to the occupants – for both laminated and toughened glass the section will stay in place if broken.
Energy efficiency is also at the top of many homeowners’ lists and with double glazed or triple glazed panels featuring Low-e glass & gas filled centres giving some designs A+ ratings you can almost achieve the same insulating quality as a solid wall – although this does not come cheap!
The 3 main materials used in the manufacture of the frames would be:
- UPVC (Vinyl)
Thresholds & Water
It is very important, due to the way Bifold door thresholds are fitted flush with floor level, that you have a well-designed threshold that drains water & is draught proof otherwise at the first heavy shower your interior could get a lot of water coming in.
Size Range for BI-fold Patio Doors
Sizes are approximate
- Up to 6 feet (1.8 metre) 2 panels
- 6 feet (1.8 metre) to 10 feet (3 metres) – 3 to 4 panels
- 12 feet (3.6 metre) – 4 to 5 panels
- 14 feet (4.2 metre) – 6 panels
- 16 feet (4.8 metre) – 6 panels
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What Does a Bifold Patio Door Cost?
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