I am also over folding doors and have the same bunching criticism as you. However everything has its place.
I think folding doors work well if your opening is small and you want the aperture to feel big when walking through. The bunching criticism is less noticeable if there is a wall for them to fold back onto which may be the case with your 90degree extension.
But my preference would be sliding doors.

Many thanks Marienne, I shall give them a try.

We prefer sliding and offer two solutions with slim interlocks and also schuco bifolds

We've been looking at the same thing and are most likely going for sliding doors - one thing that swung it for me was the fact that you can just crack a sliding door slightly open to let air in, even on a rainy or windy day. That's a bit more awkward with a bifold! We're most likely getting these http://m.arkaywindows.com/Pages/DocumentManager/Arkay_InfiniGlide3_Brochure.pdf they are probably stocked by one of the specialist door companies in Birmingham!

Bifold -BUT I think it depends how wide the aperture is and what you want to achieve - our kitchen / dining area isn't all that wide and we love opening the bifolds to the max (when its dry) so we feel part of the outdoors. If you don't want to open up the whole of the glazed area then slidingis good. A door stop works fine if you want to stop a door from flapping in the wind when only the door panel is open.

Skyglaze.co.uk 01932354821 have 2 options stunning affordable options for minimal sliding doors

Hi Rustumshah

Johnathan has touched on some valid points in regards to each option.

Some other important points to consider when looking at large doors are your requirements for privacy and light control. Will your living space be overlooked by neighbours at night or will bright sunshine need to to be filtered out.

Since the doors will be overlooking a garden, you might also want to consider installing insect screens to keep out unwanted pests.

As you are in the planning stage it’s the perfect time to consider integrated options that have insect screens and shades built-in. If this sounds like something you are interested in take a look at our Integrated Doors that are available in Folding and Sliding options.

Good luck with your build!

Kind regards

Emily

I have lift and slide Rationel timber doors in my house, which are very successful (incredibly energy-efficient for so much glass).

If you want a slimmer frame profile, try Velfac, who do an ultra-slim aluminium-clad timber slider (a bi-parting slider too, which is fun).

Have a look at some options.

If the elevation is 12 mt long - I would recommend 3 or 5 panels (an odd number always preferable to an even number as otherwise results in a central division, which is not easy on the eye.

Not sure if 4 mt panels possible but 2.4 definitely are in the case of 5.

Try finelinealuminium.co,uk for slim frames.

Good luck

thanks everyone

Have a look at Warmcore bifolds - they are slim and stack well

I'll start my response by saying we have been supplying and installing
award-winning bifold doors and award-winning sliding doors right across
the UK for 17 years, so we have plenty of experience - and unlike some others on Houzz we have no bias
towards either system.

Without seeing the plans it isn't easy to advise completely, but given your comments Rustumshah I think sliding doors are the best option for you.

We offer two slim sliding doors, theEDGE which is our award-winning system with ultra-slim 24mm sightlines and Grand Slider II which is our hugely popular slider with 83mm profiles.

In terms of choosing between systems, one of the key factors alongside visual appearances is the usability of the doors. If you get the chance to try the doors before you order then I would highly advise it. Historically some of the other systems on the market have been very heavy to open and close so if you can get to one of the exhibitions like Grand Designs Live, Homebuilding & Renovating or Build It Live where you can compare systems then that may assist your decision making.

If you want to discuss your particular project where we can answer
questions and provide a quote for your project then
simply give us a call on 01603 408804, visit or website www.idsystems.co.uk or email us at info@idsystems.co.uk.