Sound Insulation?

[Evan A. Beck]

I have driven several trucks with owner-installed sound insulation behind the back seat... I must say, the difference between insulated and non-insulated is pretty big. I was just curious about what some of you guys are using and why. I am considering Dynamat Xtreme or one of the vinyl-based materials from Cascade Auto Engineering. Anyone have experience with both of these? Pros? Cons? Any info would be greatly appreciated.

 

[krs]

Evan, there's been a tremendous amount of work done in that pursuit and several threads report the various products used with some level of success.



One of the most inclusive is this:https://www.turbodieselregister.com...readid=63647&highlight=sound+insulation+noise

but many more will show up with search using 'noise sound insulation'.



Good reading!

 

[Jamie Attridge]

I soundproofed my whole truck. I took Brownbread available at www.b-quiet.com and did the whole interoir. Roof back wall floor doors everywhere! Then I took a 3/4" sheet of plywood and covered it with speakerbox cover and siliconed it to the back wall of my truck this is also my AMP rack this really stopped alot of noise! Then I took it one step further! I got on old hood liner 02's done come with em thanks DC anyways I Brwonbreaded the whole hood then installed the liner. WOW what a difference still wanting more I then used the brownbread on the fenders under the hood and also the fire wall where I could I have a truck now that is really quiet!

 

[BarryG]

Evan:

I just did this a few weeks ago. That thread mentioned above is very good. I ended up using both dynomat extreme and brownbread. I found the extreme to be of better quality now whether it does a better job of dampening the sound not sure since I mixed them. I did the front and qc doors inside of outside skin, inside of inside skin and outside of inside skin as much as possible and put 2 layers on the back wall all the way up to the rear of the front seats at which point I ran out of material. I have 2 sheets of extreme left but not enough to complete the job. Glad I didn't pull the front seats yet. To do what I did took 1 roll of brown bread (70sf) and 1 bulk pack of extreme(36sf). Will finish the front floor and firewall after I get some more. Definite improvement in road noise and exhaust. Since I didn't do the front yet it did nothing for the motor noise. By the way on a tip from member "John" I purchased the dynamat extreme from www.thezeb.com they had the best price by far for the dynomat extreme.

 

[Morphious]

I did the floor and the back of the cab with the B-Quiet Extreme and it made a big difference, course I also removed my carpet and installed a factory rubber floor instead.



Morph.

 

[JohnMcIntyre]

Dynamat

. Seats out, carpet out, then Dynamat eXtreme (foil backed) on walls/doors and regular (!) eXtreme on floor and rear wall but not roof, then carpets and seats back in.



Once done never regretted. Absolutely essential pre-requsite for BOMBing the stereo IMHO

 

[TomGolden]

I've used the 1/2" thick SoundStop foam from Great Southern Insulation down in Florida. I used them after many emails and recommendations from Greg Long (LSfarm) the Noise Nazi of the TDR. I actually have 2 layers on the rear cab wall. I also did the entire floor and as high up on the cab side of the firewall as I could go without removing the dash, both main and both quad cab doors, as well as the kick panels, and the small panels in the rear of the cab between the Q/C doors and the rear wall. I am going to do the roof this summer. Just for reference, I believe I have used a little over 6 sheets of the GSI foam to date. It cpmes in 3' x 4' sheets if I remember right.



It has made a difference, but it is still very loud in the cab...



[edit] I forgot - Greg Long has worked a discount with these folks, but when you call you HAVE to tell them you are a TDR member. Be explicit, not just "my truck club".



Tom

 

[John]

Evan, as you may (or may not) have remembered, I used 2+ layers of Dynamat Xtreme followed with a layer of Dynamat Hood Liner on my back cab wall. This seemed to make a significant difference. Also, so did adding my canopy, having my bed Line-Xed, and later, adding the Mopar bed mat on top. Each played a small roll in quieting things down in the interior.



If I were to do things over, I would use a layer or two of Dynamat Extreme Liner as opposed to the single layer of Dynamat Hood Liner (above the Dynamat Xtreme). Why? Simply, the Extreme Liner has a layer of lead as well as other sound deadening and absorbing layers which more effectively reduce noise transmission. However, the Extreme Liner is not recommended by Dynamat for application on verticle surfaces. But...



I've never let things like that stop me before!



heh,heh,heh

 

[John]

As BarryG stated, www.thezeb.com is by far the cheapest place to purchase Dynamat products.



I purchased at least $350. more Dynamat from them late last year. Excellent place to deal with too!



Now, I just have to find the time to install all the Dynamat.

 

[KL]

I have also used the 1/2 inch GSI soundstop foam that Tom mentioned earlier. When I did the back wall of my cab, I put on some GSI Sound deadener (similar to dynamat) and put the soundstop foam over that. KL