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Old 04-21-2013, 09:45 PM   #1
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Ideas for soundproofing JK???

Ok I know that it's a Jeep and they rattle and all that fun stuff. I was just wondering since the back of my JKU is pretty hollow maybe a lot of the rattles and noise is from that. Has anyone used anything to cover the back of the Jeep with anything and they put the carpet back over it?? Just wondering if something like Dynamat would help what I am hearing. Thanks for any suggestions or info!!

Chris

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Old 04-21-2013, 09:56 PM   #2
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Something such as the Boom Mat Hardtop Headliner will muffle some of the noise, as well as aid in climate control and some say it'll improve the sound quality of the factory radio. I just bought a set for our 2-dr.

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Old 04-21-2013, 09:58 PM   #3
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Dynamat, or anything like it will certainly help quiet things down. Pull the carpet, roll it on, and put the carpet back.
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Old 04-21-2013, 10:15 PM   #4
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Originally Posted by NFRs2000NYC View Post
Dynamat, or anything like it will certainly help quiet things down. Pull the carpet, roll it on, and put the carpet back.

Dynamat is definitely not cheap huh!! Is this link basically what I would need to order or is this too much??

Dynamat Extreme Bulk Pack
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Old 04-21-2013, 10:32 PM   #5
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Consider B-Quiet as well, much the same thing but less expensive.

B-Quiet sound deadening materials - B-Quiet Extreme

Be warned, Dynamat is ridiculously sticky. Once that stuff's down it's not coming back up again, and anything that you need to get to underneath it - bolts, wires etc - will be a real hassle.
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Old 04-21-2013, 10:38 PM   #6
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It is also heavy...
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Old 04-21-2013, 10:56 PM   #7
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My JKU with hardtop isn't noisy... can barely tell it's a convertible. Maybe the 13's like mine are better though.

All of those suggestions are good, but I wouldn't put dynomat or any sound deadening material under the carpet or anything. If you have rattles in there, fix them. I would do the headliner only if I thought there was noise. Otherwise I think my 13' is very quiet.
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Old 04-21-2013, 11:00 PM   #8
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You can use b-quiet. Basically the same crap as dynomat but cheaper.
B-Quiet sound deadening materials - B-Quiet Extreme
http://www.b-quiet.com/ultimate.html


Pick the thickness you want. It is a quality product as well, and I have used it in a number of sound systems I've built back in the day.
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Old 04-21-2013, 11:08 PM   #9
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Originally Posted by Thegame View Post
Ok I know that it's a Jeep and they rattle and all that fun stuff. I was just wondering since the back of my JKU is pretty hollow maybe a lot of the rattles and noise is from that. Has anyone used anything to cover the back of the Jeep with anything and they put the carpet back over it?? Just wondering if something like Dynamat would help what I am hearing. Thanks for any suggestions or info!!

Chris
I just finished using a product called string road kill. I believe 80mil is how thick it is. It was cheaper than dynomat and you get more. I bought it on eBay. I wouldn't say it masks the road noise, but it does help. I did the floor and doors. I Also have the hothead headliner kit-top and sides. I would say the wind noise isn't as loud, but the Jeep is definitely more insulted. The stereo sounds better, and the Jeep is warmer on the cold days without blasting the heat. I'm glad I did it! Here's some pics from the install. I iPod takes crappy pictures.

Attachment 239270



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Attachment 239273
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Old 04-21-2013, 11:11 PM   #10
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Originally Posted by Wingsnut72 View Post
I just finished using a product called string road kill. I believe 80mil is how thick it is. It was cheaper than dynomat and you get more. I bought it on eBay. I wouldn't say it masks the road noise, but it does help. I did the floor and doors. I Also have the hothead headliner kit-top and sides. I would say the wind noise isn't as loud, but the Jeep is definitely more insulted. The stereo sounds better, and the Jeep is warmer on the cold days without blasting the heat. I'm glad I did it! Here's some pics from the install. I iPod takes crappy pictures.
80mils?! Wow, your rig should sound like a coffin. Thats REALLY thick.
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Old 04-21-2013, 11:12 PM   #11
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You can use b-quiet. Basically the same crap as dynomat but cheaper.
B-Quiet sound deadening materials - B-Quiet Extreme
B-Quiet sound deadening materials - B-Quiet Ultimate - Better than Dynamat!! brownbread


Pick the thickness you want. It is a quality product as well, and I have used it in a number of sound systems I've built back in the day.

Thanks for the suggestions guys. Where did you see the pick the thickness you want option? I only see where it says to order with 12 square foot or 50 square foot. Sorry for all the questions
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Old 04-21-2013, 11:19 PM   #12
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Turn up the radio. Rattles tend to disappear.
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Old 04-21-2013, 11:23 PM   #13
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Thanks for the suggestions guys. Where did you see the pick the thickness you want option? I only see where it says to order with 12 square foot or 50 square foot. Sorry for all the questions
The links I posted are two different thicknesses. One is 60mils and the other is 45mils. Obviously, the thicker, the heavier (0.30lbs/sqft vs .035lbs/sqft) and the quieter. Pick your poison.
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Old 04-21-2013, 11:45 PM   #14
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The links I posted are two different thicknesses. One is 60mils and the other is 45mils. Obviously, the thicker, the heavier (0.30lbs/sqft vs .035lbs/sqft) and the quieter. Pick your poison.
Cool cool!! Thanks
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Old 04-21-2013, 11:56 PM   #15
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I just finished using a product called string road kill. I believe 80mil is how thick it is. It was cheaper than dynomat and you get more. I bought it on eBay. I wouldn't say it masks the road noise, but it does help. I did the floor and doors. I Also have the hothead headliner kit-top and sides. I would say the wind noise isn't as loud, but the Jeep is definitely more insulted. The stereo sounds better, and the Jeep is warmer on the cold days without blasting the heat. I'm glad I did it! Here's some pics from the install. I iPod takes crappy pictures.

Attachment 239270



Attachment 239271



Attachment 239272



Attachment 239273
wow nice job man!
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Old 04-22-2013, 12:05 AM   #16
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Originally Posted by Wingsnut72 View Post
I just finished using a product called string road kill. I believe 80mil is how thick it is. It was cheaper than dynomat and you get more. I bought it on eBay. I wouldn't say it masks the road noise, but it does help. I did the floor and doors. I Also have the hothead headliner kit-top and sides. I would say the wind noise isn't as loud, but the Jeep is definitely more insulted. The stereo sounds better, and the Jeep is warmer on the cold days without blasting the heat. I'm glad I did it! Here's some pics from the install. I iPod takes crappy pictures.
Attachment 239270
Attachment 239271
Attachment 239272
Attachment 239273
How heavy is this stuff? Wrangler isn't a hot rod, so it's probably not that much of an issue. I'm sure some people wouldn't want to add too much weight to theirs though.

{Fellow Wings fan here... not much hope this year }
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Old 04-22-2013, 12:33 AM   #17
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B-Quiet Extreme weighs .30 lbs per sq ft. So 3.6 lbs for the 12 sq ft pack.
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Old 04-22-2013, 08:36 AM   #18
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80mils?! Wow, your rig should sound like a coffin. Thats REALLY thick.
You're right. It's actually 50mil, and it's Stinger Road Kill bulk pack off of amazon. Spell check sucks. I believe it's 9 panels 18"x36".
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Old 04-22-2013, 08:40 AM   #19
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Turn up the radio. Rattles tend to disappear.
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Old 04-22-2013, 08:54 AM   #20
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When I bought my Jeep at the dealer there was an option for the typical rust and paint protection but it also included a sound deadener. It is like a black foam they coated the whole underside of the body with also inside the doors and A & B pillars.
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Old 04-22-2013, 09:13 AM   #21
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I've done several cars with Second Skin and had positive results for sure - makes vehicles feel a lot more solid. Basically it is a constraint layer dampener that:

- converts vibrations into easily dissipated low level heat.
- adds structural integrity and mass to vehicle panels, eliminates resonance and flexing.
- creates a very basic thermal barrier blocking heat transfer in and out of the vehicle.
- creates an acoustical barrier of sorts

A few details...1. take care - you will get lots of aluminum razor cuts while installing 2. the aluminum backing won't rust but may oxidize over time 3. the butyl is sticky stuff - touch two pieces together and you'll be hard pressed to separate

This said.... don't think I will do the Jeep.
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Old 06-20-2013, 02:54 PM   #22
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I installed some Dynamat on the trunk area, under the passenger seats and on the floor front area as well as the speaker pots and inside the overhead speaker enclosure. The sound is definitely better from the stock radio. The road noise @ 70mph is definitely better. I will install the rest under the front seats and cover the center hump entirely. The extra weight it adds doesn't bother me. I want to be able to talk to the passenger when on the highway. Running 35" M/Ts at HWY speeds can get loud. Now I can run the radio at 13-16 without issues and I can actually use the Uconnect properly lol. boom Matt will be a next purchase.

The undercoating from the factory was a joke. I had to take it four times after the initial "application" and there were lots of gaps in places they should had sprayed.
That said, I am taking the JKU back for the last treatment. After that I will spray my own and treat some rust spots(NY salty winter roads). Skip on the cash spent for the factory to do the undercoat, unless they throw it in for free. Dynamat the interior, or bedliner it(my original idea). It does help. Yes, Jeeps are supposed to be noisy, but you can still enjoy it when the hardtop is on and you have the AC going.

E
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Old 08-16-2013, 08:46 PM   #23
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I installed some Dynamat on the trunk area, under the passenger seats and on the floor front area as well as the speaker pots and inside the overhead speaker enclosure. The sound is definitely better from the stock radio. The road noise @ 70mph is definitely better. I will install the rest under the front seats and cover the center hump entirely. The extra weight it adds doesn't bother me. I want to be able to talk to the passenger when on the highway. Running 35" M/Ts at HWY speeds can get loud. Now I can run the radio at 13-16 without issues and I can actually use the Uconnect properly lol. boom Matt will be a next purchase.

The undercoating from the factory was a joke. I had to take it four times after the initial "application" and there were lots of gaps in places they should had sprayed.
That said, I am taking the JKU back for the last treatment. After that I will spray my own and treat some rust spots(NY salty winter roads). Skip on the cash spent for the factory to do the undercoat, unless they throw it in for free. Dynamat the interior, or bedliner it(my original idea). It does help. Yes, Jeeps are supposed to be noisy, but you can still enjoy it when the hardtop is on and you have the AC going.

E
Almost two months later, do you still recommend Dynamat and did you installed the boom mat?
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Old 08-16-2013, 10:21 PM   #24
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And how long does it take to cover floors / door panels for avg person?
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Old 08-17-2013, 09:41 AM   #25
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There is a spay on application called lizard skin. They have a heat and a sound option. I'm not sure how great it is.
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Old 08-18-2013, 10:11 AM   #26
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Almost two months later, do you still recommend Dynamat and did you installed the boom mat?
I've had mine soundproofed for a few months now. I'm glad I did it. The Jeep's interior doesn't get as hot anymore, and it's a lot quieter now. Hardly any wind noise at 75mph. Can hold a normal conversation. Love it.

=)
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Old 08-18-2013, 08:35 PM   #27
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Just get some felt carpet underlayment from any carpet and supply store. I used 3/8" underlayment. I took the stock carpeting out, stenciled the outlines onto the underlayment with permanent marker, and cut with a utility knife. I had to trim some areas of the underlayment back smaller than the carpeting, so all would fit. Install underlayment first, than install carpeting over it.
I put some up the side walls under the dash too. Make sure it goes way up, so it won't fall down on the pedals.
I put fiberglass , the type used in house walls, in hollow areas in the rear walls. Don't put any in the pillars where the seat/shoulder belt apparatus is. It will stop it from retracting safely.
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Old 08-18-2013, 10:25 PM   #28
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Just get some felt carpet underlayment from any carpet and supply store. I used 3/8" underlayment. I took the stock carpeting out, stenciled the outlines onto the underlayment with permanent marker, and cut with a utility knife. I had to trim some areas of the underlayment back smaller than the carpeting, so all would fit. Install underlayment first, than install carpeting over it.
I put some up the side walls under the dash too. Make sure it goes way up, so it won't fall down on the pedals.
I put fiberglass , the type used in house walls, in hollow areas in the rear walls. Don't put any in the pillars where the seat/shoulder belt apparatus is. It will stop it from retracting safely.
This sounds like a great idea! How much underlayment did you need?
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Old 08-19-2013, 12:39 AM   #29
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And how long does it take to cover floors / door panels for avg person?
Honestly, for something like dynamat, you shouldn't cover the entire floor or door. But most people do anyway, maybe because they don't know how it works, or, because it ends up looking better since the panels are level and you dont have to use anything else to make the surfaces even.

Dynamat is about weight and vibration absorption, adding weight to panels to stop resonance/vibrations but not noise, as its not made for that. You only need enough to stop the vibration. You see people wrapping the entire floor and cargo area in it, when they only need a few sheets placed in specific places, usually in the middle of a large metal panel to stop any unwanted vibrations.

For road noise or other noise, like wind hitting through the top, you need something like the liner, dynaliner I believe it is? Its some kind of rubber/foam/neoprene kind of thing. Its actually designed to stop sound and to be used along dynamat and also works as thermal insulation if I recall.
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Old 08-19-2013, 12:42 AM   #30
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I'd recommend dynamat every day of the week, but i find this strange as I expect a TON of rattles in mine when I did my system in it and the only thing that rattles on mine is the license plate (which of course I can't hear rattling when driving, only if I'm standing outside of it playing music).

Somewhat amazed me too as I have a 900 watt JL HD amp pushing 100watts x4 to the main speakers and 500 watts to a 12w6 - I expected tons of rattles and have none.

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