Two glass panels must have high insulation properties. The cavity between them must be impermeable. This means there must be a gasket or seal all around. There are no frames on the sides of the doors. However, there is visible, narrow gasket. This blip is much smaller than the frames on bi-folding doors.
There were also very few companies that sold them. Eventually, though, I found exactly what I wanted at a good price, with a good delivery date and from a local manufacturer/installer. Everything was perfect in my garden, and I loved looking through my bifolds made of Single Glazed Acoustic Glass Partitions Leeds
These single glazed door panels are popular in Spain and are known as "glass curtains". They cannot replace bifold patio doors because they do not comply with thermal regulations. They were not weatherproof and were intended to be used as enclosures on balconies. There was, and still is, nothing comparable as a conservatory door or interior room divider for period and contemporary homes
There are hundreds of framesless glass patio doors in the UK. Some photographs can be viewed on a few websites. Some installers also import similar products, but purchasing British will allow you to install this custom-made home improvement item faster and help British businesses rebuild the economy.