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Old 12-30-2007, 05:03:34 PM   #1
gordonquixote
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Duct Insulation as a Sound Deadener...

I looked at a roll today at Home Depot (12"X15') and it looks like it is somewhere between dynamat and thermal insulation. It is foil faced and about 3/16" thick.

I almost bought a roll but I was wondering about the flammability of it - there was nothing on the package to indicated flame spread....is it safe?

I know carpet melts nicely but I would like less combustible materials in the car 'just in case'.
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Old 12-30-2007, 05:14:35 PM   #2
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What did it cost Gordon?

do a little experiment, flick yer bic and see for yourself, then let us all know.

And if it burns real good, get video
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Old 12-30-2007, 05:48:34 PM   #3
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stuff is called torch down and is for roofing. same type of stuff as dynomat. but you heat it with a propain torch to make it soft to contur the floor. great stuff and for 20.00 you can do the floor and trunk and still have some left over for another car..
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Old 12-30-2007, 07:32:12 PM   #4
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Quote:
Originally Posted by Marks71BB
What did it cost Gordon?

$16 for 15 square feet - foil backed, one sticky side, with soft cellular foam sandwiched in the middle.

I'll look into the torch down - sounds kinda like peel-n-stick roofing rolls without the granulated stuff on top. Basically dynamat!
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Old 12-30-2007, 07:38:08 PM   #5
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put it all over in my car,really is quiet now. Never did the torch test will wait to hear about that one.
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Old 12-30-2007, 08:01:41 PM   #6
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Quote:
Originally Posted by gordonquixote
I looked at a roll today at Home Depot (12"X15') and it looks like it is somewhere between dynamat and thermal insulation. It is foil faced and about 3/16" thick.

I almost bought a roll but I was wondering about the flammability of it -

I used it under my headliner, and on the sides of the rear quarters inside, and behind the rear seat.. Because I had the same concern about flammability, I used a different product on the floors.

It is easy to work with, and does deaden sound, and also has a low R-value.
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Old 12-31-2007, 08:47:35 AM   #7
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I was talking to a guy I know that has a 70 and he said that he used the Duct Insulation from home depot. I went and looked at the stuff yesterday, I almost got a roll but I'm not quite that far along on my car just yet.In about another 3 to 4 weeks I will be, no need for it to be stting in the way untill then. Home depot also carries it in a 3' x 15' for about $30.00
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Old 12-31-2007, 08:52:47 AM   #8
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If it's the type that is foil faced and thin...insulating may be good but I don't think it'll work for sound.
I have some on my garage door and all it's made of is bubble wrap faced with foil...
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Old 12-31-2007, 09:29:18 AM   #9
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Quote:
Originally Posted by kik_start
If it's the type that is foil faced and thin...insulating may be good but I don't think it'll work for sound.
I have some on my garage door and all it's made of is bubble wrap faced with foil...

The duct insulation from Home depot is thin dense foam. Foil on one side, self adhesive backing on the other. It definitely helps for sound deadening.
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Old 12-31-2007, 04:34:20 PM   #10
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i used rammat foil and foam...its more expensive but when you tap on the metal there is no noise, except for a thud...its going to make car heavier
www.raamaudio.com/




also did rear deck lid....doors need done yet
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Old 12-31-2007, 07:55:37 PM   #11
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I know lots of people over at the corvetteforum used "Reflectix" from home depot/lowes as under carpet insulation. Don't have any personal experience with it as I have never gotten to that point yet, but they always gave it good reviews and at an affordable price.
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Old 12-31-2007, 08:52:50 PM   #12
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[quote=gordonquixote]I looked at a roll today at Home Depot (12"X15') and it looks like it is somewhere between dynamat and thermal insulation. It is foil faced and about 3/16" thick.
[quote]

I used a 4x4' square piece from the firewall to under the seats and it reduced the heat inside the car bigtime!!! works great and did quiet the car down a little..

Go for it, alot cheaper than dynamat
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