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<blockquote data-quote="keep_hope_alive" data-source="post: 8479282" data-attributes="member: 576029">i didn&#039;t add MLV to the roof.&nbsp; just stuffing the cavities, a few squares of deadener, and the radiant barrier was more than enough.&nbsp; my YouTube channel has a video of me knocking on it - it&#039;s shockingly dead.i don&#039;t consider the roof to be a dominant noise source (the glass is), but if you did add MLV you would need to pin it to the roof supports.&nbsp; be SUPER careful here so you don&#039;t go through into the roof.&nbsp; i&#039;d consider zip ties through the holes in the supports to prevent using any fasteners.i didn&#039;t cover the holes filled.&nbsp; you can if you want.&nbsp; the results will be different.&nbsp; if left open, they are excellent sound absorbers.&nbsp; if covered, they reduce the internal volume of the car and boost noise isolation.&nbsp; you can cover with MLV or deadener, or any other limp mass.another friend documented his implementation of my door treatment process here:<a href="http://www.driveaccord.net/forums/138-audio-electronics-lighting/374945-front-door-build-log-improve-sound-quality.html" target="_blank">Front Door Build Log: Improve the Sound Quality - Drive Accord Honda Forums</a></blockquote>

[QUOTE="keep_hope_alive, post: 8479282, member: 576029"] i didn't add MLV to the roof. just stuffing the cavities, a few squares of deadener, and the radiant barrier was more than enough. my YouTube channel has a video of me knocking on it - it's shockingly dead. i don't consider the roof to be a dominant noise source (the glass is), but if you did add MLV you would need to pin it to the roof supports. be SUPER careful here so you don't go through into the roof. i'd consider zip ties through the holes in the supports to prevent using any fasteners. i didn't cover the holes filled. you can if you want. the results will be different. if left open, they are excellent sound absorbers. if covered, they reduce the internal volume of the car and boost noise isolation. you can cover with MLV or deadener, or any other limp mass. another friend documented his implementation of my door treatment process here: [URL="http://www.driveaccord.net/forums/138-audio-electronics-lighting/374945-front-door-build-log-improve-sound-quality.html"]Front Door Build Log: Improve the Sound Quality - Drive Accord Honda Forums[/URL] [/QUOTE]

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