Honest 1
Too bad I am not around your area to come and install some new windows for you.I am a glazier by trade and since 1989 that's what I do,fabricate and install commercial curtain wall systems.That's the fancy glass on the high rise towers.
But I did a lot of residential work too.I would definetely recommend aluminum windows with glass of at least 4 mil thickness sealed units installed on glazing 1/8 shim tape(double glass)Low-e,argon filled.One inch overall thickness.Aluminum frame must be thermally broken .Obviously a non operative window (fixed)would be more sound proof but one that contains sliders at the bottom and sealed glass unit on the top portion is the best compromise.Usually they go with sealed glass unit for the 2/3portion of overall height and remaining bottom part with sliders (four sliders in total,two exterior and two interior).
Good installation is critical.Absolutely use expanding foam around the new installed window,that will stop a lot of noise,air movement,heat transfer.When measuring for the replacement window you must allow 1/4 of an inch clearance all around for expansion e.t.c.It is that gap that needs to be foamed,let cure and cut foam flash with a sharp OLFA knife.
Best of luck
George
Too bad I am not around your area to come and install some new windows for you.I am a glazier by trade and since 1989 that's what I do,fabricate and install commercial curtain wall systems.That's the fancy glass on the high rise towers.
But I did a lot of residential work too.I would definetely recommend aluminum windows with glass of at least 4 mil thickness sealed units installed on glazing 1/8 shim tape(double glass)Low-e,argon filled.One inch overall thickness.Aluminum frame must be thermally broken .Obviously a non operative window (fixed)would be more sound proof but one that contains sliders at the bottom and sealed glass unit on the top portion is the best compromise.Usually they go with sealed glass unit for the 2/3portion of overall height and remaining bottom part with sliders (four sliders in total,two exterior and two interior).
Good installation is critical.Absolutely use expanding foam around the new installed window,that will stop a lot of noise,air movement,heat transfer.When measuring for the replacement window you must allow 1/4 of an inch clearance all around for expansion e.t.c.It is that gap that needs to be foamed,let cure and cut foam flash with a sharp OLFA knife.
Best of luck
George