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Glossary of terms for slide and fold doors

The frameless slide and fold doors you see on our website are developed by us to create a slide and fold door for your home like no other. As you do your research around bifolding or even sliding doors, you may come across some technical expressions. So to help you, we have created a glossary of terms for slide and fold doors.

Glossary of terms for slide and fold doors

Glossary of Terms for slide and fold doors.

Some of the terms and definitions used are relevant to all types of folding doors; others are exclusive to our unique frameless doors.

Bifolding door system.

When people talk about a bifolding door system, they are referring to the company that is behind the design of a particular “system”.  The frameless slide and fold doors from FGC are our own bespoke purpose-designed system you will not find on sale anywhere else.

We make our advanced frameless bifolding doors that are fitted by us and guaranteed by us.

Frameless doors.

A frameless door, whether hinged or bifolding is a door with little or virtually no visible framing. Study carefully other versions of slide and fold door marketed as ‘frameless’, and you will see plastic or aluminium extrusions covering the glass edges of the doors.

Only our doors give you a true frameless appearance. The correct definition of a frameless slide and fold door is the one with no visible mullions. Our doors have no visible mullions yet remain secure and highly weather resistant.

Traffic Door.

A traffic door on a bifolding door is an independent hinged leaf that works like a regular door. Traffic doors are very beneficial in enabling you to use the doors all year round without having to slide or fold any of the remaining door panels.

If your new door is the only door out to your garden or you wish to benefit from easy access in and out all year round, we recommend a traffic door.

Low threshold.

Bifolding doors are broadly speaking available with a standard rebated or a low threshold. It is the low threshold that enables you to have the level floors either side of your new doors.

Many bifolding door systems with a low threshold option will advise that there is no weathering or that low threshold doors are only available for internal applications.

The threshold on a frameless slide and fold door is as low as 5mm and still has a weather rating.

Energy efficient glass.

A quality folding door has double glazing or triple glazed units. These glass units are made with warm edge spacer bars, argon gas fill and low-emissivity coatings. These and other materials create energy efficient glass.

Energy efficient glass, when used in conjunction with the thermally broken framing create doors that help reduce your heating bills.

The energy efficient glass used in our frameless slide and fold doors is patented and unique to our doors. On our sealed units, you will find a beautiful transparent spacer bar made of toughened glass, not plastic or metal. We use toughened 20 mm glass spacer at the edges, sandwiched between 4 mm – 6 mm Low Iron (light reflective) or Pilkington Planitherm 4s energy efficient glass with argon gas filling.

Thermally broken aluminium.

Aluminium profiles in their raw form are inefficient conductors of heat. For current slide and fold doors, the aluminium profiles are modified with a thermal break. This is an insulating material that forms a bridge between the inside and outside faces of the aluminium.

Thermally broken aluminium is warmer, better insulated and with the glass, contributes to creating an energy efficient door with low U-Values.

U-Values.

A U-Value is a measure of the thermal performance of a slide and fold door. The lower the U-Value, the better the performance. The glass used in our frameless bifolidng doors has a U-Value of 1.0Wm2K

Bifolding door configuration

The bifolding door configuration refers to how the door is designed for your home. Configuration relates to the number of panels, the sliding direction, whether the doors open in or out and if there is a traffic door.

Colour, handle options and other access also come under configuration.

PAS24.2012

A quality door is subjected to independent testing for its security. One of the most highly regarded security tests is PAS24.2012. PAS24.2012 specifies test methods and other criteria to test the enhanced security performance of doors and windows. These test methods are designed to resist the methods of attack from the opportunistic burglar.

Our frameless glass slide and fold doors are independently tested to PAS24.2012.

Bifolding door stack.

The bifolding door stack refers to the fully open doors where all panels are folded open to one or both sides. When configuring a bifolding door consider how much space the doors will take when in the open position. The more door leaves, the bigger the stack and space taken.

With profile sizes of 45mm, our frameless slide and fold doors take up just 180mm on a four panel set. Conventional aluminium bifolding doors are more than double this dimension.

Bifolding door Mullion/Sight Line

The bifolding door mullion relates to the visible size of any bifolding door when in the closed position. Each door panel meets the next creating a sight line.

The major aluminium systems in bifolding doors have sight lines on average of 120-154mm. Frameless bifolding doors give you only a minimal gasket line as they have no visible mullions or door hinges at this mullion/sight line junction. There is no slimmer slide and fold door on the market.

If you would like further information on our range of frameless slide and fold doors, internal doors or frameless room dividers, contact us today.

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What our customers say

Always Polite

Re delivery, there was an initial hope that you might be earlier than the 6-8 week lead time, but once that wasn’t going to happen, you gave us a date, and were then able to bring it forward a couple of days to fit around our holiday schedule, which was great.  Guys turned up at

Delighted with the transformation

The Glass Curtains are all that you promised….and are much admired. We are delighted with the transformation to the dining area now that the decoration is complete. Will forward cheque by post tomorrow( Friday)  and some pictures by E . Don’t hesitate to use us as a satisfied customer!

MR VH, Essex

The service I received from FGC was professional and prompt from the initial on site survey through to installation and completion. Added to this the finished product has exceeded my expectations. It has enhanced my home with style and individuality, and enabled me to make use of the space in a way that is ‘unique’.

After Sales Customer Service Exceptional

Thank you for your excellent after sales customer service it is exceptional.
The track coating was repaired to a very high standard by Dan the “Magic Man”, he is very professional and his work is very good, to the point that it is difficult to spot where the repair has been made.
Best

JD

HP

Yes we are very pleased with the doors and would recommend them. Initial contact was done by our neighbour at Kingswood so cannot comment, however, the price we were initially quoted was incorrect and significantly lower than it turned out to be. Not sure why. We at Derwent only had a verbal quotation. The installation

Excellent product and great service

I am delighted to have found FGC online! I installed their glass curtain between my office and the kitchen/living room area. It looks fabulous! Easy to use and can be locked.
I visited the factory and it looks smart and professional. All communication has been fast and also very professional. Will definitely use again!

Lilia Severina
Lilia

Pleased with the product and installation quality.

I found Frameless glass Curtains very easy and trustworthy to deal with. All personnel I had contact with were polite and professional. I am very pleased with the product and installation quality.

Mr M Donovan
Mr M Donovan

bringing the outside in!

as an Architectural Technologists, I stumbled across FGC and its proved to be my best stumble. I have knocked two rooms into one to make the most of viewing my garden, my wife and I were looking for the most unobtrusive bi fold door frame to maximise the view, which was proving a challenge until

Anthony Mackin
Anthony

Professional and Efficient

We had FGC doors and windows installed in our house in May 2019. From our initial enquiry through to installation everything was handled very professionally and with attention to detail. The doors and windows themselves are excellent quality and definitely enhance the house. The fitters who carried out the original installation were very good and

Geoff Radford
Geoff

Mr W @ Church Street Sutton Courtney Oxford

We had been dealing with a large commercial glass door supplier who were extremely slow and unable to meet our requirements for a large opening on our barn. I found your product on the website and came to see you at your farm. You came out the following week and the installation was completed with-in

Great product with amazing after sales service

All of our dealings with FGC have been great. They are professional, friendly and accommodating. Our glass curtain is wonderful and we love it even more than we thought we would. The few little settling in issues we’ve had have been dealt with so quickly and their technical team are incredibly easy to deal with.

rhona mead
Maisie

The most stylish doors!

We first saw FGC at the Grand Designs exhibition in the autumn of last year (2019). We have had frameless glass doors and windows fitted to our house extension and they look fabulous from inside and outside, and make the rooms extremely light. Opening these doors is quick and easy. The service has been attentive

Ashley Fulton
Ashley

Published on September 11, 2017

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