want to sound proof bedroom window, whats best to use?
i have bedroom window that i never used in 10 years, never even opened the curtains in that time.
looking for some sound insulation to put in it to stop noise coming through.
opening is 2000mm wide x 1050 high and 100mm deep. its a block wall its in.
im thinking of putting some sound insulation in it between the curtains so cant see it from outside that will block noise and screws board over the window on the inside. i have 100mm of gap to play with.
what would be best sound proofing for this?