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<blockquote data-quote="Rudy" data-source="post: 7502950" data-attributes="member: 568035">I try to use enough material to cover 25% of the panel, spread out over the central 40-50%. Here&#039;s the theoretical ideal on an open panel like a roof:<img src="http://www.sounddeadenershowdown.com/_forum_images/tile_distribution2.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" />Doors get a little more complicated (in theory):<img src="http://www.sounddeadenershowdown.com/_forum_images/civic/doors/front-door-tile-placement.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The blue rectangle is the stock material.The black horizontal bars are the side impact beams.The Black square is a steel structural element attached to the outer skin.The yellow rectangles are vibration damper.The key concept here is that the side impact beams are bonded to the outer skin. They are that way from the factory in this Civic. I fill the gap on cars where they aren&#039;t connected.The side impact beams effectively divide the outer skin into 3 &quot;virtual&quot; panels. Target the centers of each one.Treating the roof with vibration damper is almost always a good idea. Floors usually need no or very little supplemental damping. They are reinforced at many points and usually have a lot of material installed at the factory. You really need to add a barrier for noise reduction on the floor.</blockquote>

[QUOTE="Rudy, post: 7502950, member: 568035"] I try to use enough material to cover 25% of the panel, spread out over the central 40-50%. Here's the theoretical ideal on an open panel like a roof: [IMG]http://www.sounddeadenershowdown.com/_forum_images/tile_distribution2.gif[/IMG] Doors get a little more complicated (in theory): [IMG]http://www.sounddeadenershowdown.com/_forum_images/civic/doors/front-door-tile-placement.jpg[/IMG] The blue rectangle is the stock material. The black horizontal bars are the side impact beams. The Black square is a steel structural element attached to the outer skin. The yellow rectangles are vibration damper. The key concept here is that the side impact beams are bonded to the outer skin. They are that way from the factory in this Civic. I fill the gap on cars where they aren't connected. The side impact beams effectively divide the outer skin into 3 "virtual" panels. Target the centers of each one. Treating the roof with vibration damper is almost always a good idea. Floors usually need no or very little supplemental damping. They are reinforced at many points and usually have a lot of material installed at the factory. You really need to add a barrier for noise reduction on the floor. [/QUOTE]

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