how do i go about sound proof my existing walls. i've contact sound proofing companies but with an existing house it seems they are not interested. Don't get me wrong they've been a big help over the phone but thats about it. There are only 4 companies that i've found through the the blue book building & construction (www.bluebook.com) that specialize in anaylysing & construction. I'm desperate to get this job going but not also ready to lose my shirt in cost. help!!!