Sound deading question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Harpie · 09-21-2014, 06:18 PM

My cab is getting it's make over at the body shop and I'll have it back soon. My question is since I'm using fatmat do I still need to run the factory black pads up on the firewall under dash area. Just trying to get everything ordered so I can get my cab back together when it's back at home. Thanks for any help!

leftybass209 · 09-21-2014, 06:57 PM

You do not HAVE to, but more insulation in that area can help keep the engine bay heat where it belongs.

88fordf150 · 09-21-2014, 07:01 PM

I think it would help keep the heat out and the cold air in if you have a/c. I think it really depends on what look you want.

Harpie · 09-21-2014, 07:04 PM

Quote:

Originally Posted by 88fordf150

I think it would help keep the heat out and the cold air in if you have a/c. I think it really depends on what look you want.

Thank ya sir I'll prolly go ahead and install both then.

Z10 · 09-21-2014, 11:53 PM

Take a look at my build thread. Just did this. Fat Mat + Aluminized closed cell foam + MLV (Mass Load Vinyl) + Carpet insulation + Carpet.

Harpie · 09-22-2014, 07:05 AM

Quote:

Originally Posted by Z10

Take a look at my build thread. Just did this. Fat Mat + Aluminized closed cell foam + MLV (Mass Load Vinyl) + Carpet insulation + Carpet.

I'll take a look thanks.

**MidLifer** · 09-22-2014, 01:59 PM

Remember, Fatmat and like products do not block sound, they dampen vibration. If you want to block sound, you need to use Mass Loaded Vinyl. Also, you only need to put the mat on 20-40% of the metal area to get the desired effect.

The science behind all this can be read on this excellent website, to which I have no connection but to which I owe my peace and quiet:

http://www.sounddeadenershowdown.com/

09-21-2014, 06:18 PM	#1
Harpie Registered User Join Date: Jan 2012 Location: Durant OK Posts: 372	Sound deading question My cab is getting it's make over at the body shop and I'll have it back soon. My question is since I'm using fatmat do I still need to run the factory black pads up on the firewall under dash area. Just trying to get everything ordered so I can get my cab back together when it's back at home. Thanks for any help!

09-21-2014, 06:57 PM	#2
leftybass209 Registered User Join Date: Feb 2011 Location: Modesto, CA Posts: 2,186	Re: Sound deading question You do not HAVE to, but more insulation in that area can help keep the engine bay heat where it belongs.

09-21-2014, 07:01 PM	#3
88fordf150 Registered User Join Date: Nov 2009 Location: Michigan Posts: 473	Re: Sound deading question I think it would help keep the heat out and the cold air in if you have a/c. I think it really depends on what look you want. __________________ Brad handshoe

09-21-2014, 11:53 PM	#5
Z10 Registered User Join Date: Aug 2012 Location: Midland, TX Posts: 1,267	Re: Sound deading question Take a look at my build thread. Just did this. Fat Mat + Aluminized closed cell foam + MLV (Mass Load Vinyl) + Carpet insulation + Carpet. __________________ 1969 RS/SS Z10 Camaro Pace coupe 1972 GMC Short Step buildhttp://67-72chevytrucks.com/vboard/s...=1#post6356218 1979 Mazda RX7 1979 Pontiac Trans Am WS6 & 1979 Pontiac Trans Am 10th Anniversary 1999 Honda Valkyrie 2006 Corvette Z06 2010 BMW 650i

09-22-2014, 01:59 PM	#7
MidLifer Senior Member Join Date: Apr 2011 Location: South NJ Posts: 1,260	Re: Sound deading question Remember, Fatmat and like products do not block sound, they dampen vibration. If you want to block sound, you need to use Mass Loaded Vinyl. Also, you only need to put the mat on 20-40% of the metal area to get the desired effect. The science behind all this can be read on this excellent website, to which I have no connection but to which I owe my peace and quiet: http://www.sounddeadenershowdown.com/



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