Custom Folding Sliding Doors by Folding Door Co.
Here's a secret we had to share: You no longer have to refinance your property to afford an architectural wall of glass doors that collapses to create an indoor/outdoor space. In fact, you can order this system as if you were ordering drapes—it's that simple. Custom made for openings up to 50 feet, these aluminum-framed doors are shipped in a DIY kit directly from the factory in Britain.
About $10,000 for a four-door system; thefoldingdoor.co.uk