We had Elite Windows (from Buxton) put in these bi-folding doors in the the workshop. They are really smart.
The frames are made from aluminium and have integral blinds within the glazing. They can open out to give a large entrance space. Here's what they look like from inside:
Oh yeah, I also painted the inside. I managed this just before my wife went into labour and had to go to hospital, literally just before!
We've used Elite Windows before to fit the uPVC windows in our house, the proprietor Alan Barnes and his team have been excellent on both occasions. They take pride in the work they do and if there are any problems after the job has finished then Alan sorts it out straight away, we'd recommend them to anyone.