comments:
OutsiderLookingN posted on r/apartmentliving3w
I used the reflective insulation foam like in car windows for over a decade and it works fantastic. My new landlord won’t allow so I have heavy black out / sound insulation curtains and they don’t help as much Reflectix BP48010 Double Pack Insulation, 48 in. x 10 ft https://a.co/d/0gs7RtqC