A sliding door always leaves a gap which wont cut out noise. How about a bi fold door which gives a snug fit. You can then select triple glazed panels to further keep the noise down. I suggest looking at 'doors of distinction', amazing variety of glass patterns tho' may not be double/triple glazed or 'Steve Sherriff ' for ideas. Good luck. Bee

Stackable doors, when fully open, will free up the entire width, especially those which fold out towards the outside. So if you walk out into a patio, these will open up the patio view, making itlook larger. Sliding doors on the other hand will always block part of your 3.3m width. Depending on how many panels 4 or 5, you your total width will be reduced by say around 75-85 cm on each side. Perhaps in my opinion more appropriate for larger openings, say above 5m.

Hi, I know this discussion has been a while now, but what option did you finally go with? We are also in a similar situation. We are considering a bifold or slide and turn option. Sunseekers reviews seem better than new wave. I look forward to hearing what option you went with.

Hi Adam, we also looked at both sliding doors and slide and turn for our opening and were shocked at the price of the slide and turns. One thing that a few designers and window providers said to us was that essentially slide and turn doors (or bifold doors) look better when they are open, and sliding doors look better when they are closed (as they tend to have fewer panels and so less view is blocked by pane). As we are based in London, where for most of the year the doors will be closed, we were advised by everyone to go with sliding doors. (NB our opening is wider, so it was a difference between 3 sliding door panels or 6/7 slide and turn panels).