I am looking to noise proof a common wall that I share with my next door neighbor. The wall is made of dry wall with a space in between it which I would like to fill up with insulation. Questions 1. Is there any insulation that blocks out noise completely? 2. What is the best way to find a professional? Do they carry a certification for noise proofing? 3. How much will this cost me? 4. What can go wrong? 5. How long does it usually take to noise proof a wall? Can I stay in my home during that time? 6. Will I have to rip out my side of the wall? 7. How are outlets protected? Any answers or advice is welcome.