Factory Folding Interior Soundproof Bifold Doors Aluminium Folding Glass Door

Usually, we use 5mm+6A+5mm double glass, you can take easy. Our double glass is made professionally, no steam or going foggy between the double glass.

Yes, all the doors & windows include frames. Installing the windows and doors on wall is OK.

It is better to use 5mm double glass, because: A) Sliding door looks ugly with single glass. There is a wide space for glass, if you use single glass, we will fill so much silicon in it. B) 5mm double glass is safer than 6mm single glass. C) 5mm double glass is more soundproof than 6mm single glass.

Yes, but it just can be one side, the other side has to be glass silicon. Because it is not strong enough to use double rubber. And it is easier to fall off than the glass silicon.

There are 90 degree and 45 degree corner connecting. 90 degree window is connected by screw, and we assemble the 45 degree window by corner brace. The 45 degree corner connecting window is new style, which is easy to overhaul.