sound deading roof/ trying to kill roof flex

[petergunz559]

Hopes this is the right spot, A couple of months back I installed 2 18s in my 98 astro. Its sounded real good and hit really hard, now the roof sounds like poop. really bad, and the bass is covered through the rattles. I dampend the sides with spray foam and some fatmat. but sense I did that the roof sounds even worse. any strength the roof on a astro before? Im going outside in the heat in a bit to remove headliner. any tips n pics would be highly appreciated. thank you oh and if i remove the roof rack, would that make the roof weaker??

[Phantom]

Hopes this is the right spot, A couple of months back I installed 2 18s in my 98 astro. Its sounded real good and hit really hard, now the roof sounds like poop. really bad, and the bass is covered through the rattles. I dampend the sides with spray foam and some fatmat. but sense I did that the roof sounds even worse. any strength the roof on a astro before? Im going outside in the heat in a bit to remove headliner. any tips n pics would be highly appreciated. thank you oh and if i remove the roof rack, would that make the roof weaker??

You need to use sound dampening material , something that absorbs noise and vibration, Depending how much power you are using it could be a big expensive task to get what you want , there is a tutorial on how Mr Singh did his van with like about 30 pics on how he built it ,,likely the most impressive van you'll see in any time soon ; the entire rear of van has like 18 large subs and can make a shirt DANCE , literally

This is his van , I am sure he can tell you anything you need to know , you can see/hear his system videos on you tube

[petergunz559]

Thank you!!!

[Mr Bones]

Go Here > http://www.astrosafari.com/viewtopic.php?f=32&t=518

[JaxSPL]

second skin audio sound deadener. Look at the sludge. It can be rolled or brushed on. It is thick and dries hard as hell. It's a little expensive, but well worth the price to get rid of the roof rattle (or any other rattle). If you're serious into audio, you'll want to get this stuff.

What I have found with my roof is the supports going across the width of the van came loose from the roof. Not sure how to get them back in place/shape to do any good.

You can also use, along with sludge, minimal expanding foam. Spray it along the supports, in between the roof and support. This will help out a lot and once you've gone over that with sludge.. you'll be hard pressed to hear a rattle from the roof in the areas you put it.

[paintdrying]

That second skin can also be sprayed on. They sell the gun for @30 dollars.