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Comparing sight lines on bifolding doors

Bifolding door sightlines are one of many considerations when choosing a new, quality folding sliding door for your home.  To help you understand this feature found in all types of doors, we explain more about it as well as what to consider. We also compare our best selling frameless doors with some of the best-known brands.

bifolding door nightlines
Only our frameless sliding and fold doors come with virtually no sight line and no visible mullion.

Everything you need to know about bifolding door sightlines.

First of all, the definition of a sight line is the amount of non-glass material, blocking the line of sight through any door in the closed position.  Many good brands of bifolding doors now offer reduced sightlines thanks to the better design.

Secondly, every door, whether aluminium, PVCu, timber or even our frameless doors, require a frame. One frame houses the glass units; the other frame is the perimeter frame fixed to your house.  The outer frame is always visible – as every door needs this for rigidity, security and weather performance.

Third, is the visible frame you see around the glass.  In a conventional bifolding door, every panel is independent. As a result, when looking at a closed set of doors, you see visible mullions.  The more panels in your bifold, the more mullions you see. This is the sightline.

Therefore, while bifolding doors are outstanding as a patio door, opening up your home, in winter, they remain closed. Consequently consider that the thinner the mullion, the more glass you get and the better views through the glass.

Comparing bifolding door sightlines on aluminium bifolds.

At FGC, not only do we have a lot of bifolding door experience, but we also know other products too.  Our patented frameless system is a premium quality door.  With no visible mullions as well as no aluminium, only our door offers you the slimmest bifolding door sight lines. Therefore,  if you’re comparing our doors to other top brands as you do your research, we make it easy for you to compare bifolding door sightlines.

BIFOLDING DOOR SYSTEM Door Sight Line
FGC Frameless Double Glazed Door Virtually no sightline
Schuco ASS 80FD 112mm
Schuco ASS 70 FD 120mm
Reynaers CF68 131mm
Centor C1 Bifolding Door 136mm
AluK Optio BSF70 Folding Sliding Door 140mm
Origin Bifolding Door 154mm

Of course, there are other brands of bifolding doors, but we are showing you the premium brands allowing you to compare on a like-for-like quality basis.

Four Reasons why frameless doors are the better bifolding doors.

If the sight lines on your bifolding doors matter, there are more great reasons to choose an FGC frameless slide and fold doors.  Our unique mullion design provides benefits and a better bifolding door in other areas too.

No unsightly door hinges.

Any aluminium, upvc or timber concertina style bifolding door needs hinges to connect the door panels. As a result, you get not only visible mullions but also visible hinges.  Inside the doors, you also get two handles. One is a pull handle the other is a locking handle.

Our frameless system uses our roller system with durable guides meaning the doors do not require any intermediate hinges.

Better views through the glass.

Look at the double glazed units in your home, and you will see a white,  silver or black ‘spacer bar’.  A spacer bar holds the two panes of glass together as well as providing energy efficiency to the overall window or door.  Thermal performance in glass and windows help lower your energy bills.

Our doors also use thermally enhanced spacer bars. However, at the door mullion, we use glass instead of plastic or metal.  As a result, we offer better clarity through our already minimal sight lines.

Thinner aluminium than other bifolding doors.

As well as offering you no visible mullions and the best aesthetics, our doors also have thinner aluminium in the critical areas.  Our door rails and our outer frame is smaller than most bifolding doors on the market.

Furthermore, our doors are also narrower depth profiles too.  So not only do you get thinner doors when closed, but you also get neater stacking doors when open. Our fully folded panels take up less space than other brands.

A lower bifolding door threshold.

The thinner bifolding door sightlines and thinner frame also allow us to design a lower threshold.  Even better is our threshold is lower than other brands’ threshold and comes with a weather rating.  Check out most other bifolding door thresholds marketed as ‘low’, and you’ll often see a disclaimer saying there is no weather rating or that threshold suggested for internal use.

Contact us today to find out more and for a free quote.

Our unique patented product offers all the benefits of a bifolding door such as transforming your living space and enhancing your home.  They are energy efficient, secure and weather resistant.  Our doors also give you better views thanks to slimmer frames and bigger glass panels.  They also have the best sight lines. Contact us today to find out more and get a free quote.

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What our customers say

Really Pleased

As to how we were from initial contact (were we polite)?   Very polite and attentive, always got back quickly with answers to queries but there was no hard sell which I really appreciated after being bombarded by calls and contacts from other companies!  The measuring up part seemed more complicated than it needed to

It is fabulous

Thank you.  It is fabulous  

J Comley (Margate)
J Comley (Margate)

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

Our Frameless Glass walls

Putting a frameless glass walls between our South facing lounge and dining room conservatories was one of the best things we have ever done in our house. When shut, they keep out the cold in winter and, most importantly, the heat on very hot summer days. When open during sunny winter days, the heat warms

Heather Glasgow
Heather

An underestimated product

After visiting a NT stately home which had a glass porch entry I asked fgc to see if they could do one for us. I had the vestiges of a porch with brick sides but no front. The installation made the entrance a feature which is declared up market and interesting. It is a halfway

Professor Eaton
Professor

A talking point up and down the village

Glass Curtains have caused a talking point up and down the village but nobody has knocked on the door yet. We are very pleased with them and thank your teams for their timing and workmanship  

Mr R
Mr R, Fareham

Outstanding

This is the first project I have completed with FGC and it will not be the last. From the original survey and quote, right through to final installation, the team at FGC have been tremendous. The communication and detail is outstanding, the quote was fair market competitive and the final result of the product in

Claire Menzies
CMenzies

Mr JR

We have had these doors for several months now and are very pleased with them. Our initial contact with the company was very positive, the structure and operation of the doors clearly explained. The installation was carried out very efficiently with no disruption and the installers were friendly, their work clean and tidy. Our friends

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

Chartered Building Surveyor I was impressed with the installers

I would like to reiterate that we are very pleased with our new FGC doors. As a Chartered Building Surveyor I was impressed with the installers who were careful, methodical and very professional my wife who is most particular was also very impressed with their cleanliness. I am sure we will get many years of

Mr A B

We are very pleased with the glass curtains, which do what we want them to – separate the house and conservatory, meeting building regs, but as unobtrusively as possible. We were very happy with the service we received and the efficiency of those who fitted the curtains and we would have no hesitation in recommending

Look Great and Slide Beautifully

As it happens, we are still sadly not in the house. We should be however at the end of February which will be great! I can however pretty much respond to the below as I have been able to test the doors. 1. Your performance was excellent from what has been reported by the builders.

Published on May 28, 2015

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