Hi Kathryn, we manufacture bi folding doors to suit any purpose. Regarding sound proofing we use the best seals on all joints. The joints between doors have 2 seals. Our standard doors are 54mm thick which does prevent most sound traveling through. However if you want extra thickness we can increase them to 68mm and install acoustic glass. You can contact us on 01633 740636 or view our work here http://timberbifold.co.uk

I think slim line sliding doors look more modern and you'll get more view of your garden. We were going to have bifolds but have now decided on sliding doors. Our opening is 4m and planning to have 3 doors. As your opening is quite large, you could have 3 door and once they are opened, you will still get a good size opening. We're having 35mm profiles but I think you can get even thinner ones. Are you have a flat roof or pitched roof?

At home we have one of each. Sliding from the dining room into the garden room and then bifold in the garden room. I like both but it’s nice having the bifold that can be stacked providing an uninterrupted view. We’ve left our bifolds open all through this hot weather. On the downside a blackbird flew into the open bifolds. Needless to say he came to an unfortunate ending.

The kitchen is an extension, the "new dining area" would have been the old kitchen so no structural wall will be knocked down. Below is the outside. The current window will be moved and will fit in opening of French doors and bricked up. And bifolds will go where small window is need to know how big to take it. And do we try and match up the frames and go white PVC or aluminium?? Below wall will be knocked down to create one big space through. It's a stud wall so will be leveled off. No beams This will be new dining area with bifolds