You can make a regular glass material using the Wizard in the material editor, and then increase the surface roughness to maybe 10-30. If you also want a smooth part for reflections you can add a regular non transparent bsdf as well, low roughness and set it's weight to 5-10.
And, correct me if I'm wrong, but you should be prepared for lots of noise....
I won't sign it, if it is not a piece of art.. So far, I haven't done any...
Revit Architecture 2012, Max Design 2012, AutoCAD 2012, Moi3d, Maxwell, Octane ... and many working hours
Nope. It really depends on how the scene is lit. If it's lit from emitters behind this glass, yes it will be noisy. Well placed fill lights will definitely help.