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Basic soundproofing. I need some input #2701283
07/31/12 09:30 PM
07/31/12 09:30 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
For awhile I've been considering adding some soundproofing to my Focus. I've read a lot online about people using roofing membrane material as sound deadening, as it is similar to a lot of 'professional' sound deadening products. What I really want to know is: how much do I really need to apply?

I've heard that even a 1' x 1' square applied to a panel can make a HUGE difference in absorbing vibration and some sound. Is this true? If so, I can easily apply a little sound deadening to each panel on the car (doors, trunk, etc).


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Basic soundproofing. I need some input [Re: Klutch9] #2701295
07/31/12 09:39 PM
07/31/12 09:39 PM
Joined: Apr 2010
Posts: 13,534
Chicago, IL
dparm Offline
dparm  Offline
Joined: Apr 2010
Posts: 13,534
Chicago, IL
Without knowing the precise location the sound is originating from, you're better off applying as much as possible. Doors, floors, ceiling, etc. I have seen some people go nuts and gut the entire interior.

It comes down to "mass". The thicker and heavier stuff deadens the sound better. So yes, a single 12"x12" square can provide some relief, depending on the type of noise you have making its way into the cabin.

Last edited by dparm; 07/31/12 09:54 PM.

2017 Chevrolet Corvette Grand Sport
Re: Basic soundproofing. I need some input [Re: Klutch9] #2701309
07/31/12 09:55 PM
07/31/12 09:55 PM
Joined: Aug 2006
Posts: 9,804
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,804
Central Washington
Yes, just doing the middle of the panel as best you can is usually enough. Doing up to the edges does not help as much because what the sound deadening does is prevent ringing of the metal. The edges are not going to ring because they are pretty stiff. Its the middle of the panel that is going to do it.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: Basic soundproofing. I need some input [Re: Klutch9] #2701340
07/31/12 10:15 PM
07/31/12 10:15 PM
Joined: Feb 2011
Posts: 6,718
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,718
Hudson, NH
I use this stuff with a sticky back. Put it everywhere. Rip the rugs and seats out, put it down, put the rugs and seats back, what a difference. Seems to help with heat and the cold too. stick it to the inside of the door panels. under your speakers to direct sound, etc. ebay has it cheaper

http://www.eastwood.com/eastwood-thermocoustic-material.html


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Basic soundproofing. I need some input [Re: Klutch9] #2701460
08/01/12 01:19 AM
08/01/12 01:19 AM
Joined: Sep 2006
Posts: 19,479
Chicago Area
mechtech2 Offline
mechtech2  Offline
Joined: Sep 2006
Posts: 19,479
Chicago Area
Are you atteuating a loud sound system?
Are you quieting the car from out side noise?
These require different approaches and materials.
Cheap jute carpet underlayment with duct tape and construction glue works well for ambient noise reduction.

Re: Basic soundproofing. I need some input [Re: mechtech2] #2701600
08/01/12 08:32 AM
08/01/12 08:32 AM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Originally Posted By: mechtech2
Are you atteuating a loud sound system?
Are you quieting the car from out side noise?
These require different approaches and materials.
Cheap jute carpet underlayment with duct tape and construction glue works well for ambient noise reduction.


Yes, I am trying to quiet some of the ambient/road noise.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Basic soundproofing. I need some input [Re: mechtech2] #2701723
08/01/12 10:30 AM
08/01/12 10:30 AM
Joined: Apr 2007
Posts: 206
Boston, MA
jhMalibu Offline
jhMalibu  Offline
Joined: Apr 2007
Posts: 206
Boston, MA
Originally Posted By: mechtech2

Cheap jute carpet underlayment with duct tape and construction glue works well for ambient noise reduction.


I did this on my 09 Ranger on the door panels. Made a big (enough for me) difference without costing stupid money. I didn't break any of the plastic seals on the door so shouldn't be a moisture problem.

Re: Basic soundproofing. I need some input [Re: Klutch9] #2701725
08/01/12 10:35 AM
08/01/12 10:35 AM
Joined: Oct 2008
Posts: 19,090
Sunny Florida
SteveSRT8 Offline
SteveSRT8  Offline
Joined: Oct 2008
Posts: 19,090
Sunny Florida
Yes, it can make a HUGE difference.

Some of it is heavy, but there are a lot of choices now. I have used this in several cars and trucks and the difference is well worth the effort.


"In a democracy, dissent is an act of faith."
J. William Fulbright
Best ET-12.79 @ 111 mph
4340 pounds, Street tires
Just like we go to Publix
Re: Basic soundproofing. I need some input [Re: SteveSRT8] #2702083
08/01/12 04:54 PM
08/01/12 04:54 PM
Joined: Nov 2003
Posts: 264
Rio Grande Valley
mgm13 Offline
mgm13  Offline
Joined: Nov 2003
Posts: 264
Rio Grande Valley
I used "FatMat",bought a bulk pack 50 sq ft & put it down.Self adhesive and you must roll it down tight.I did everything but the headliner. A huge improvement-worth the cost and effort.


mgm13,NRA Life Member

2012 Toyota Highlander LTD
Re: Basic soundproofing. I need some input [Re: Klutch9] #2702106
08/01/12 05:13 PM
08/01/12 05:13 PM
Joined: Sep 2006
Posts: 19,479
Chicago Area
mechtech2 Offline
mechtech2  Offline
Joined: Sep 2006
Posts: 19,479
Chicago Area
I did my headliner, doors, floor [under the carpet] and trunk area with carpet underlayment and also some extra in spots of the high density under hardwood foor insulation.
A couple of hours and the car was MUCH nicer.
My ZX2 needed it more than a Crown Vic, though.

Re: Basic soundproofing. I need some input [Re: jhMalibu] #2702798
08/02/12 12:16 PM
08/02/12 12:16 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Originally Posted By: jhMalibu
Originally Posted By: mechtech2

Cheap jute carpet underlayment with duct tape and construction glue works well for ambient noise reduction.


I did this on my 09 Ranger on the door panels. Made a big (enough for me) difference without costing stupid money. I didn't break any of the plastic seals on the door so shouldn't be a moisture problem.


Just curious... Did you put the jute on the plastic door skin, or on the metal inside of the door? I could easily pull all of the door skins off and put a layer of jute on them, without even touching the plastic/moisture seals. Doing it this way wouldn't really dampen door vibrations, but it WOULD block sound I'd think.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Basic soundproofing. I need some input [Re: Klutch9] #2703032
08/02/12 04:07 PM
08/02/12 04:07 PM
Joined: Sep 2006
Posts: 19,479
Chicago Area
mechtech2 Offline
mechtech2  Offline
Joined: Sep 2006
Posts: 19,479
Chicago Area
Outside of the plastic is the same as inside, for noise attenuation.
If the door panel fits back on, it will work great. Why disturb the plastic if you don't have to?

You can also spray bedliner - any heavy coating - on the inside of the doors [under the plastic on the inside door skin]. Make sure the drains are free afterwards!
Don't plug the drains!
Don't use stinky stuff - it'll take forever to go away!

Last edited by mechtech2; 08/02/12 04:08 PM.
Re: Basic soundproofing. I need some input [Re: mechtech2] #2706138
08/05/12 10:58 PM
08/05/12 10:58 PM
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
Klutch9 Offline OP
Klutch9  Offline OP
Joined: Jan 2009
Posts: 2,460
Rochester, MI, US, World
I have decided on what I'm going to do. After some careful listening while driving, it seems that a good majority of the road noise comes from the trunk area. So I'm going to deaden that first, using 'Quick Roof' from Home Depot (same as Peel & Seal from Lowe's). I'm going to do literally every surface in the trunk: floor, spare tire well, sides, trunk lid, and rear deck. I'm picking up the supplies tomorrow morning and will probably have it applied before the end of the work week, but it'll depend on my schedule. If all goes well and I notice some positive results, I'll move on to doing the doors also.

Part of me feels that it's not worth it... it's just a Ford Focus. But the other part of me feels that for a few bucks, why not give it a shot? After all, I plan on driving this car until it dies, so why not make it 'user-friendly'? The '08-'11 Foci (basically the same car, just facelifted) is much quieter, thanks to better sound deadening. Hopefully I can find a way to put my '07 somewhat on par with its newer siblings.


'11 Fusion SE 2.5L - 79k miles - HK 0w20 syn, Wix XP filter
'08 Sedona LX LWB 3.8L - 126k miles - Havoline HM 5w20, Auto7 filter
Re: Basic soundproofing. I need some input [Re: mechtech2] #2706925
08/06/12 06:13 PM
08/06/12 06:13 PM
Joined: Jun 2003
Posts: 486
Los Angeles, CA
razel Offline
razel  Offline
Joined: Jun 2003
Posts: 486
Los Angeles, CA
I have tried and use undercarpet padding, dynamat knockoff and neoprene sheets. I recommend dynamat for large flat metallic areas, but the most muffling and quietest effect I got from neoprene sheets to replace the vapor wrap found in doors and undercarpet padding above the wheel wells in the trunk.

Neoprene sheets in various thickness can be bought cheap off ebay and carpet padding super cheap at your local Home Depot or Lowes.

Last edited by razel; 08/06/12 06:14 PM.
Re: Basic soundproofing. I need some input [Re: Klutch9] #2707459
08/07/12 09:24 AM
08/07/12 09:24 AM
Joined: Dec 2002
Posts: 4,153
The Garden State
Whimsey Offline
Whimsey  Offline
Joined: Dec 2002
Posts: 4,153
The Garden State
My 1996 Contour has lots of "road noise" emanating from the trunk. I know it's from the trunk because when we go on vacation and the wife packs enough luggage for 2 months for a 10 day vacation it's real quiet, she's not though grin2.

Whimsey

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