Bi-Fold and Folding Sliding Doors explained

The sliding doors we have in Europe and North America are based on the sliding Shōji or Fusuma door in traditional Japanese buildings. Widespread use within large hotel chains in the 50s and 60s has led to them becoming a very popular element in residential construction over the years.

With the advancement in glazing technology, they are now also an energy efficient option to enhancing your home.


Sliding glass doors come in many styles, and can be referred to by many names. Some are double glazed doors with one door on a track. More recent styles come in several sections, and are known as bi-folding or folding sliding doors.

Essentialy, they all serve the same purpose in providing door access from a dining room, kitchen or living room to a garden or pation area and a source of fresh air, copious amounts of natural light and a full indoor/outdoor experience.

What about security?


Modern folding sliding doors are extremely secure. Strong construction from resilient materials, double glazed panels and mult-point locking systems mean that your patio door will be secure enough to deter all but the most determined unwanted visitor.

Multi-point locking systems feature a key-locking cylinder, incorporating a latch for convenience, mushroom headed ESPAG bolt and shootbolts top and bottom.

Key locking facilities are available for additional internal security, depending upon your individual needs.

A five-lever key-locking cylinder is incorporated within Euro profile doors, and these are are fitted to the end lead door or single pass door where there are an odd number of panels, or to the first opening pair, in an even number of panels. These can be fitted to either the inside only or both internally and externally as required, meeting the requirements of the Association of British Insurers.

Where you might want added security, additional key locks can be added at every intermediate handle point.

What about heat loss and energy efficiency?


Modern folding / sliding doors come with double glazing, or even on occasion triple glazing, designed to keep the heat in and the cold out.

The efficiency of these units is now such that the impact on heating costs is negligible.

Energy efficient glass helps conserve and retain heat within your home, keeping the weather out, resisting condensation and allowing ‘free’ natural energy from the sun to heat the home.

Typically, doors can be made using any frame material – PVCu, aluminium, steel, wood or a combination.

If you’d like a brighter living space, dogive us a call or send us an email.