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post #1 of 56 (permalink) Old 11-21-2013, 09:03 PM Thread Starter
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DIY: How I fixed our 3rd gen road noise issue

So I have seen a lot of grumblings about how bad road noise is in our cars. I have installed some dynamite equivalent in my car and it is now much quieter than my bmw. 128i. I was genuinely surprised by the improvement. All you will need is 50' of 50mm fatmat, a box knife, a small roller to press it into place a heat gun and some aluminum tape to cover any edges that you feel might need it. Takes about 2 hours and remember it does not need to be perfect because it will be covered by a door panel. All said you can get what you need for about $150. Sorry about the quality of some photos.

The instructions are for the front door but the process is the same for the others except for the small piece of trim by the mirror.

Remove the trim by the front mirror


Remove screws that are under the door handles. There are 2 on each door


Pull door panel till it pops off then unplug the switches and remove door pull from panel.

Cut layers of fatmat to size using a box knife (scissors will get clogged up) to cover entire panel heating the fatmat till it is warm enough to adhere then press it into place using the small roller. If you overlap don't worry, just make sure not to cover any holes the panel snaps into. Cover any edges with aluminum tape.

then cover any edges with your aluminum tape.

As you can see it doesn't have to be a work of art. works the same no matter what

It's easier than it looks and made a night and day difference in my car.

Follow steps in reverse when your done and repeat for each panel.


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Last edited by 2014mazda6; 11-21-2013 at 09:24 PM.
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post #2 of 56 (permalink) Old 11-21-2013, 11:07 PM
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Looks very nice. Thanks for the walkthru! I might do this in the spring.
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post #3 of 56 (permalink) Old 11-22-2013, 12:12 AM Thread Starter
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Originally Posted by venomxjr View Post
Looks very nice. Thanks for the walkthru! I might do this in the spring.
Thanks. I meant to add this in the walk through. I would try and do it before it get to hot. The sound deadener will stick to anything and stay there once it's warm. The colder temperatures definitely made it easier to place exactly where you want it to go.


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post #4 of 56 (permalink) Old 11-22-2013, 12:37 AM
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You did the 4 doors for 150.00 ? What kind of weight do you think it added to the vehicle ? Thanks..

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Last edited by cpnfantstk; 11-22-2013 at 01:01 AM.
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post #5 of 56 (permalink) Old 11-22-2013, 02:02 AM Thread Starter
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You did the 4 doors for 150.00 ? What kind of weight do you think it added to the vehicle ? Thanks..

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it might make more sense to get 100sqft and all the tooling on amazon for a few dollars more and do the trunk as well which is what I did. All said it was less than 30 lbs and if you just do the doors it would be less weight than that.

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post #6 of 56 (permalink) Old 11-22-2013, 12:04 PM
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This is something I want to do as well with Damplifier or Raammat and also add a layer of thermozite or overkill.
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post #7 of 56 (permalink) Old 11-22-2013, 01:48 PM Thread Starter
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This is something I want to do as well with Damplifier or Raammat and also add a layer of thermozite or overkill.
Dont wait. Probably one of the single best improvements to the car.
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post #8 of 56 (permalink) Old 11-22-2013, 04:57 PM
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2014mazda6, thank you so much for sharing. Most folks on the wind noise thread suspect the noise is passing through the window seals and the pillars. looks like that is not true based on what you did. Roughly what percent nosie reduction did you feel after installing the fatmat?
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post #9 of 56 (permalink) Old 11-22-2013, 05:33 PM Thread Starter
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Originally Posted by S100Y View Post
2014mazda6, thank you so much for sharing. Most folks on the wind noise thread suspect the noise is passing through the window seals and the pillars. looks like that is not true based on what you did. Roughly what percent nosie reduction did you feel after installing the fatmat?
It probably was about 30%. Which is huge. I still hear some noise through the windows if a truck or car is right next to the driver window, a given since glass is acoustically transparent. Overall noise was greatly reduced. I mostly hear just the engine now which isn't a bad thing. I am trying some different materials in the actual window seals to see if I can further improve the noise coming into the car and haven't had any improvement yet but will keep everyone posted. I took some of the door seals off and inspected them and they are quite beefy. I suspect there is little to be gained there. Excited to see if others have similar results to mine or see other solutions.

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post #10 of 56 (permalink) Old 11-22-2013, 07:21 PM
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Instead of fatmat, use either Dynamat or Raammat or Damplifier Pro from SecondSkin (the best of all three). SecondSkin also has Spectrum, a spray that produces a viscoelastic layer for sound deadening (many use this spray over the aluminium tape or on wheel wells when there's prominent road noise).
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