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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

Mr PM

We chose FGC because we wanted something unique to connect both garden and our new room. Unique design, simple flawless construction, ease of use and durable construction all fit perfectly with what we wanted. FGC further enhanced the fit with great service and on site installation, answering any further queries we had very quickly. 20150112

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

Unfailingly Helpful

It is a good time to say to you that while we still very much the windows, the ease of opening, the views closed or open, now that the weather has turned colder we have been struck quick dramatically by the improvement in insulation.  The large windows here that you/we have replaced were double glazed

No Hesitation in Recommending You

A brief note to thank you for your services in supplying two sets of doors and two fixed panels. From the start of contact with your company you have been very professional and communication has been excellent. The panels now installed look amazing and appearance when compared with usual bi folds or other types of

A great installation

“Thank you again for a great installation, we are really enjoying the extra light.” I will be sending a load more images your way at some point today.

Mr T – Woking

I have nothing but praise

I have nothing but praise for FGC who have just replaced a panel in my frameless glass curtain which is almost 10years old…there was no quibble and they replaced it quickly and efficiently…I would recommend their frameless product to anyone wanting a stunning addition to their home..with 5 star service

rosalie reeder
rosie

Recent maintenance visit

FGC came to carry out some minor maintenance and as always they were very efficient and friendly. During this period of social distancing, they were well prepared and able to do the work safely and professionally.

David Paterson
David

the amazing glass door from FGC

The amazing glass door has transformed our kitchen and given it a wonderful inside/outside living feel and flooded the room with sunlight. It’s a fantastic product. The whole team at FGC were superb.

Gerry Geddes
Gerry

Professional, diligent and friendly with it

Dealing with FGC has been a straightforward and hassle free experience from start to finish. I had several queries long before placing an order and FGC were always prompt and helpful with the responses. Then at site survey time they attended on time, with courtesy calls leading up to the appointment to keep me advised,

Matt Chenery
Matt C

Brilliant After Installation Service

Our FGC sliding doors were installed in May 2018.
Although we have had two relatively minor problems – neither of which stopped the doors from working – FGC have attended very promptly to carry out remedial action.
Excellent customer service from head office and excellent service from install technicians.
Many visitors comment

Nick Medlam
Medlam

Start to Finish

From that first phone I knew I had found the product and the company! We wanted an internal glass partition and a bespoke fit. It arrived on time to the exact specifications detailed and was fitted by genuinely helpful guys who want the product to look good and work well. All the staff at the

Craig Ives
Craig

Brilliant, on time and tidy

I just wanted to follow up as I was in the gallery this morning.  The guys were brilliant, on time, tidy, efficient and they fitted the door perfectly. We are very pleased   20151107

Published on September 11, 2017

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