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Discussion Starter #1
I read a few posts about sound proofing the trunk area of our cars
with Dynamat/Fatmat etc or using sticky foam duct/pipe insulation.
Was getting tired of yelling at the person beside me to have a
normal conversation so decided to try it myself.
I removed all the carpet and lining from the trunk area and then actually
drove the car around for a day to hear where most of the noise was coming
from. These areas I found where targeted with additional layers of Fatmat
and foam padding.

I was going to line the trunk with Dynamat (as used before) and then
found the cost was too much so I located the 1/8 foam padding at Rona
instead. Then searching thru Ebay found a place in Oakville that sells
Fatmat in bulk at a cheap price so decided to pick up 100sq/ft of it.

Now having a pile of foam padding and also a pile of Fatmat I decided
to line the trunk area with Fatmat and then put the foam padding overtop
of the Fatmat too. This was a best of both worlds in sound insulation.


Here is a photo of my 99 Z51 trunk area with all carpeting and lining removed.



Now with the Fatmat installed after 4+ hours of rolling.
If you notice the back wall I already applied the foam padding on top of the Fatmat.
I wish they did not put so much ink/logos on the material as my hands where blue!



Final photo of the Fatmat and foam padding installed overtop of it.



Final notes, I added a double coating of Fatmat over the wheel wells top and side.
I added double coatings of Fatmat on the back trunk wall area and double foam padding
as the trunk wall liner would still fit properly.

The difference from this moddification is amazing the back of the car
is dead quiet from road noise yet you can still hear the growl of the
exhaust. Now what I need to do next is the front car area under the
seats and the doors. I will save that for another weekend.
 

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Great write up and pictures. Did you happen to weight all the insulation to keep track of how much weight was add with the project. Just curious?

Thanks again for the great write up on the project.
 

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Great write up and pictures. Did you happen to weight all the insulation to keep track of how much weight was add with the project. Just curious?

Thanks again for the great write up on the project.
Good question :agree: . Any mod I install has to be equal to or lighter than the the part I am replacing. But then again I'm :crazy:

Sound proofing is one of the mods I've been wanting to do for a while now. Thanks for taking the time out to inform us. Your trunk looks great :thumbsup: .
 

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Discussion Starter #4
The Fatmat is approx 30lbs for 100sq/ft.
I used about 40sq/ft on the trunk area of the car so that would be about
12lbs of weight for the Fatmat. The foam is so light the weight might be
5lbs at the most. In total that would make it 20lbs for the rear depending
on the thickness of the mat material you use.
With the lining of the front and doors it should take less then 100sq/ft with
foam also the max weight would be no greater then 40-50lbs.

100lbs of weight will cost you about 1/10th in the quarter.
 

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Great post!

Why'd you use the foam stuff... did it make a difference? If so... what way?

And... do you think multiple layers of the foam could equal fatmat's sound deadening quality?

Thanks.:thumbsup:
 

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Discussion Starter #6
Had used Dynamat on an old Mustang years ago and had amazing success.
I decided to go with the foam as was alot cheaper but then rethought the
Dynomat type material when I found the Fatmat on Ebay as it was cheaper.
So since I already had the foam and had bought the Fatmat decided to use
both, first the Fatmat and then the foam for extra sound insulation.
Also for those complaining about any asphault smells the top coating of foam
padding seals things up nicely.

I dont know if multi layers of foam would do the same as the Fatmat has so
much density to it. I think the two combined is the way to go as they are two
different material types and will work differently at stopping the unwanted sounds.
 

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Great thanks for the weight info....:thumbsup:
 

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Great job, now I need to do mine.:thumbsup:
 

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[/B]
Had used Dynamat on an old Mustang years ago and had amazing success.
I decided to go with the foam as was alot cheaper but then rethought the
Dynomat type material when I found the Fatmat on Ebay as it was cheaper.
So since I already had the foam and had bought the Fatmat decided to use
both, first the Fatmat and then the foam for extra sound insulation.
Also for those complaining about any asphault smells the top coating of foam
padding seals things up nicely.

I dont know if multi layers of foam would do the same as the Fatmat has so
much density to it. I think the two combined is the way to go as they are two
different material types and will work differently at stopping the unwanted sounds.
:WTF What asphalt smells :lookinup: ??? This is the first I've heard of asphalt odors after installing soundproofing. Who's complaining about it?? What product are they complaining about?? How bad is it??? Are you talking about the dynamat stuff? Which product is producing this offending odor?? Do tell.

Thanks in advance.
 

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Hello flybyu.. everyone is waitng for an answer to your smelly post....

hello hello hello
 

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Discussion Starter #12
Sorry for the less then lightning response, I dont hound over the forums all the time between 11:30 and 4am in the morning.
And try not to get your panties in a knot.

I used the Dynamat on my 91 Mustang thought the whole car and it did have a definite smell to it.
At that time it was an asphalt based product I think, now since the switch to extreme its a rubberized compound.
If you hold a sheet of it to you face and sniff there is a certain smell to it for sure.
Does it bother me, No, that is why I installed it in my car!

For anyone who says it smells/stinks or gives off and odor the foam on top would help at sealing that in and
keeping them happy. Does it bother me, No I dont smell anything at all with the Fatmat extreme as it too is a
rubberized compound.


"Xtreme is better than the original Dynamat: no more bad smell, easier installation without a heat gun, and 4 times of the damping efficiency"

"Dynamat is asphalt. Stay away. Dynamat Extreme is buna rubber with aluminum backing and it works fine. Can be applied in multiple layers in critical areas. Once applied it is very hard to remove, which can be good or bad depending on your intentions!"
 

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^^^^^

Ok, your post above clears the air ( pun intended :) ). I was going to purchase dynamat as this was one of the installs that I wanted to do for a while. So, when I'm ready to buy, I need to make sure I purchase some of the new stuff dynamat is putting out. I guess I should do a sniff test before I take it home just to make sure I'm not purchasing the old asphalt based stuff.

Alright dude thanks :thumbsup:. Oh and as far as panties, I rarely wear underware :devil: :cheers:
 

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Discussion Starter #14
Ok, no problem buddy, glad to clear things up.
Hope your install goes well, make sure to post some photos.
 

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Great write-up. I'm considering using the products by RaamAudio. Anyone have experience with them? Supposedly as good as Dynamat, however the mat and ensolite is less expensive due to direct marketing/sales.

http://www.raamaudio.com/
 
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