The Pros and Cons
Bi Fold Doors have been the modern patio door of choice for the last few years due to their ability to open up rear elevations of a house. It is an easy option for homeowners looking to create an indoor-outdoor living environment.
The downside to bi-fold doors in modern architectural design is their sight-lines. When closed aluminium bifold doors have a thick vertical framing section where both bi-folding panels meet which is normally at least 120mm depending on the system of choice.
We all love the thought of opening the entire rear wall of our home to the garden but let’s be honest; in the UK the amount of the year which we can actually do this is limited to a month or so in summer.
Modern sliding doors, like KELLER minimal windows®, are becoming a much more popular option for architects and design-minded homeowners looking to create a modern, indoor-outdoor rear patio design.
The slim framing afforded to glass sliding patio doors, even when closed, means that the boundaries between inside and outside are blurred. If you opt for a sliding door system that offers a full floor to ceiling glass finish, like KELLER minimal windows®, then that barrier is blurred even further.
If you want to open up an entire aperture with the slim framing afforded to Keller minimal windows, design them to slide into pockets within your external walls. The minimal framed sliding patio doors can slide easily away into the wall opening up the whole door opening but when closed the doors still have a 21mm sightline.
|Standard Bi Fold Doors||minimal windows||minimal windows 4+|
|Maximum panel height||3m||4m||4.5m|
|Maximum panel width||1.2m||Overall size of 8.5m2 per panel||3m|
|Vertical Frame Width||120mm||21mm||26mm|
|Floor to ceiling glass finish||No||Yes||Yes|
|Flush floor finish||Dependant on installation||Yes||Yes|