Door Sound Deadening Placement Question

Hi all! Longtime reader, first time poster. Had a question I could not find a direct answer for. I ordered Dynamat Xtreme to reduce road noise in my truck as it’s very loud in the cabin on my long highway commute everyday. I am planning to do the whole truck eventually but am going to start with the doors.

During all my research on it, the only thing is not clear is are you supposed to add Dynamat to both the inner door skin as well as the area where the panel goes? Is there any benefit of doing both? Appreciate any help in advance!

 

You definitely want to do your outer door skin, doing the inner door skin also helps, especially around the speaker. Really any undamped sheet metal will benefit from some dynamat. Just keep in mind, when you go to do your doors, carefully peel back the moisture barrier plastic and keep it intact. Stick it back in place when you are done. It serves to keep moisture out of the interior door panel and the cab.

 

Go big or go home. Do both inner and outer skin.

 

If I’m doing Dynamat over the entire door panel, where would the plastic go? Over the Dynamat? I’ve watched the install videos from Taco tunes and didn’t see them put the plastic back on? Maybe I missed that part, I’ll look again

 

If you cover the entire hole that was covered by the moisture barrier, no - you don't have to put it back in.

 

you don't need to put Dynamat on the door skin. Place it on the metal. There is a plastic sheet tacked to the metal. I recommend taking the plastic off and placing the Dynamat in that same area. If you don't have enough material for that I would recommend covering places where the metal is a bit thinner and whatever voids you can. There are a lot of products out there that are a bit cheaper than Dynamat and works just as well.

 

Are there areas in the inner skin that you don’t want to do? Mainly will the Dynamat block the window from coming down?

 

Yeah definitely covering the entire whole like in the taco tunes video. I looked at other brands as well but Dynamat was only like 10-15 bucks more so I just went with that

 

I wouldn't do the outside of the inner skin, just inside of outter and inside of inner (what the speaker sits on) skin.....if that makes sense.

 

Dynamat alone will do very little for road noise. It's more for vibrations and rattles. To block road noise you need foam and something with a lot of mass, like lead sheets of mass loaded vinyl.

 

I think I follow you. I’m just asking about the metal you can see through the opening where the plastic front the factory is. Basically the backside of the door metal

 

Waiiiiiit a sec. You have a dark colored truck and you are in TX......I would just do the inside of the inner door skin. I remember reading somewhere that in hot climates sound deadener could melt and make a mess.....
You are safe on the inner skin, but I wouldn't mess with the outer one that could get really hot .

 

In my experience, quality sound deadener like Dynamat won't have an issue with Texas heat. I used to have a black truck with Dynamat on all the doors (inner/outer skins) and never had it melt or make a mess.

 

That's good to hear!

 

My truck isn’t black, it’s the dark charcoal color but I see what your saying. So why do people do the outer skin, is there a benefit?

 

This is how you do it if you want it to actually work. A single, unbroken piece that bonds the entire door. (No gaps or breeches)



Inside the door too, overlapping so it doesn't peel off in the heat of summer, (applied with 600° heat gun to ensure proper initial adhesion).



Spray door panels with deadener too then stuff any area that is a void with foam to get rid of any possibility of a fucking rattle!

Relax and enjoy peace and quiet.
...and when you close the door, it sounds like an iron vault door, with a super deep thud as it shuts, not a tin can ready to cry.
I use Cascade professional sound control products.
In the car application it is called V-BLOK.


http://www.cascadeaudio.com/

 

The back wave of the speaker rings on the outer door metal. This causes terrible, and horrific anomalies in sound quality. The quieter every surface is, the better the sound quality and the less amount of power (amp) is needed to get good reproduction.

 

This. And it actually does cut down on road noise too.

 

I’m sure I’m not the only one to think dynamat is overpriced. So I researched and found this video of a product sold at Lowe’s. The guy who made the video also posted comments of how it’s holding up 4yrs later. I’m gonna go get some and install it. 50sqft of dynamat he mentioned is $220 where this product available locally is $60 for over 50sqft

https://youtu.be/ZaE7RfkN1Eo

 

Hate to break some bad news but that stuff is not the same as dynamat, it would probably be ok to cut down some vibrations and rattles but it doesnt have the same mass or other properties as dynamat. I would be worried about melting and smells from it. Theres another product called frost king duct insulation that people say is the same, it's not. Its light weight foam and foil, I got some and used it in a few spots for the purpose of rattles, but it's not a true sound deadening material, you'd get the same effect by gluing some skinny yoga mat material to the metal. Dynamat and other CLD tiles are very heavy and specifically designed for audio purposes. Idk what materials make up that stuff you posted, but if you strictly wanna cut down on minor rattling that is not caused by the stereo, I would suggest the frost king foam stuff.

 

I did the outer and inner door skins as complete coverage as i could get. I put a piece of 1/2" dynafoam behind eack speaker as well. For the 4 doors i used over 50sf of dynamat
Photo of part way thru the outer door skin


Finished door, i kept the dynamat 1/2 to 1" inside the line of the door panel so the panel would install tight to the door skim still.

 

Great detail. Good job on the sound deadening. About to do this to my '04.