Effective use of sound deadening

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Old Apr 21, 2009 | 12:44 PM
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Effective use of sound deadening

I'm seeing some mighty impressive application of sound deadening products, and I'm considering doing it to my truck. It would seem the most effective place for sound deadening would be the door panels. This is where I'll probably start unless there is another area that is more critical. What does everyone use to cover the large access holes in the door. I know I don't want anything permanent, but something that can be removed. Is it necessary to cover every square inch of the outer door panel?
 
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Old Apr 21, 2009 | 01:15 PM
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I am currently going to be using plexiglass and sheet metal screws to seal that area up so I can take it off when I need to. I would also recommend the back wall on the cab it will make a huge impact there as well. Then if you want to go all out go with the floor and the roof.
 
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Old Apr 22, 2009 | 07:11 AM
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How thick is the plexiglas? Are you going to apply deadener to it too? I'm thinking I might try and find some thin aluminum sheet for the access hole. I figured doors would make the biggest difference for deadener. I'm still using that OEM covering on the rear wall, so I figured with covering in place, it wouldn't make that much difference. The doors are definitely vibrating. How did you prep your doors for the deadener. Approximately how many sq ft of deadener covered your 4 doors? I've been following your install. Looks good! I wish I had the time to pull something like that off.
 
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Old Apr 22, 2009 | 08:10 AM
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I am using 1/4" thick plexi that I am going to bolt and seal to the door. I will probably only run dampener along the edges of it to only cover the bolts. I am wanting to be able to see into the door panel to check for problems before I have to tear into something.

Covering the back wall will still make a big difference, that is where a majority of your road noise comes from. I drove with the back wall uncovered for a while and it is ridiculous how much noise is really let in back there.

I used probably 20 sq ft per door but I doubled up the dampener to make sure I had the doors good and quite. I used the 62 sq ft roll that Rick at Raamauido sells. I put the rest of it on the back wall and the transmission hump in the center of the truck. I will be purchasing two more rolls here in the near future to complete the job. I have the two rear doors left, the roof, and most of the floor needs covering.

Thank you for the kind words, it is a decent system with a great install. I still have a lot to learn but I know that it will be a good preforming system for my sq needs.
 
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Old Apr 22, 2009 | 10:05 AM
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I had the top part of my rear seat out and I know what you're talking about. But most of that road noise is coming through the rear vents. I am not impressed with that design. Did you cover yours up?
 
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Old Apr 22, 2009 | 10:20 AM
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Not really but I build a little cover for them with a .25" spacer to that way air could still flow out. But I dampened it, and it really helps to deflect the sound waves coming in. Now I have the best of both worlds I felt it was a fair compromise.
 
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Old Apr 22, 2009 | 11:19 AM
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I appreciate the info. If I could bug you with one more question? How much deadener did you need for the rear wall?
 
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Old Apr 22, 2009 | 11:26 AM
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I did double layers on the back wall but it really does not take too much to do just a single layer, I would say less then 15 sq ft.
 
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Old Apr 22, 2009 | 12:20 PM
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Originally Posted by 05_sprcrw
Not really but I build a little cover for them with a .25" spacer to that way air could still flow out. But I dampened it, and it really helps to deflect the sound waves coming in. Now I have the best of both worlds I felt it was a fair compromise.
Would you have any pics of this?
 
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Old Apr 22, 2009 | 12:29 PM
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I will try to get some later when I get off work.
 
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Old Apr 22, 2009 | 08:01 PM
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Originally Posted by 05_sprcrw
I will try to get some later when I get off work.
Excellent, thanks...
 
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Old Apr 25, 2009 | 10:50 AM
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Fill the back corners with expanding foam. I notice the most noise coming from those corners more than anywhere else.
 
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Old Apr 28, 2009 | 11:16 AM
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Originally Posted by 05_sprcrw
I am using 1/4" thick plexi that I am going to bolt and seal to the door. I will probably only run dampener along the edges of it to only cover the bolts. I am wanting to be able to see into the door panel to check for problems before I have to tear into something.

Covering the back wall will still make a big difference, that is where a majority of your road noise comes from. I drove with the back wall uncovered for a while and it is ridiculous how much noise is really let in back there.

I used probably 20 sq ft per door but I doubled up the dampener to make sure I had the doors good and quite. I used the 62 sq ft roll that Rick at Raamauido sells. I put the rest of it on the back wall and the transmission hump in the center of the truck. I will be purchasing two more rolls here in the near future to complete the job. I have the two rear doors left, the roof, and most of the floor needs covering.

Thank you for the kind words, it is a decent system with a great install. I still have a lot to learn but I know that it will be a good preforming system for my sq needs.
Would you happen to know what the size of the hole in the door is you are covering with Plexi? I need to order some and I would rather not take the panel off if I do not need to. I have a screw if it matters.
Thanks in advance
 
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Old Apr 28, 2009 | 11:49 AM
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Sorry I have not been able to get pics of the vent covers yet. But the plexi is an odd shape I can measure when I get home but roughly I would say it will take a 30 x 24 min for each door so you can cut it to the correct shape.
 
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Old Apr 28, 2009 | 02:45 PM
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Originally Posted by 05_sprcrw
Sorry I have not been able to get pics of the vent covers yet. But the plexi is an odd shape I can measure when I get home but roughly I would say it will take a 30 x 24 min for each door so you can cut it to the correct shape.
No problem on the covers and thanks for the information. I am still in the process of getting materials together so I have time to wait on them. I have saw the pictures of the holes and knew they were odd shape but I just wanted to get a rough estimate of the size of the piece I would need to cut them out of so I can get it on order. If you can get a measurement, it would be greatly appreciated. I am trying to learn from everyone elses experience to do the best possible install in the easiest way possible so I appreciate any information and assistance I can get.
 
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