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#1 |
Registered User
Join Date: Feb 2014
Location: CA
Posts: 84
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Sound deadening
How much sound deadening material will I need to cover the cab of my truck, the fire wall, floor, and back wall. I was looking at the dynamat bulk pack it comes with 38 sqft, curious if this is enough. Does anyone have any recommendations doing this, should I do the doors too and also should I coat my floor with a rust inhibitor or something like por-15?
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#2 |
Registered User
Join Date: Oct 2012
Location: Arlington Washington
Posts: 1,808
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Re: Sound deadening
My ball park guess would be 45sq ft. You can also find it by length x's width of back of cab, floor, and firewall. I would imagine 38sq ft would get you pretty close. Dynamat is a sound deadnear only it will not protect the metal other then just surface water/moisture wouldn't penetrate the underneath steel
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#3 |
Senior Member
![]() Join Date: Oct 2013
Location: Bay Area, CA
Posts: 493
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Re: Sound deadening
I used Second Skin, here is a great deal on their B stock stuff.
http://store.secondskinaudio.com/b-stock-40-pounder/ With the 40lb stuff, I had a good amount left after lining my car. High quality stuff. |
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#4 |
Senior Member
![]() Join Date: Apr 2011
Location: South NJ
Posts: 1,266
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Re: Sound deadening
Have a read on www.sounddeadenershowdown.com before you embark on this project. What I learned there is that the "mat" products are vibration dampeners and that you only need to cover 30-40% of the meal area. The key is to add a layer of a product called mass loaded vinyl that actually blocks sound from passing through it.
This is yet another of those subjects on which we all have opinions and Im sure mine is different than a lot of folks here, but read that site and examine his data for yourself. I did and am very happy with the results. |
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#5 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Sound deadening
Sound deadener deadens the panels. It does not insulate against sound (well, not at the frequencies you care about). MidLifer is right. For example, on my back wall of my cab I put an insert of mat on each of the "low" stamped areas. No need to cover the whole thing.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#6 |
Registered User
Join Date: Jul 2011
Location: Farmville, Va
Posts: 3,026
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Re: Sound deadening
I used Dynamat and did the roof also, I'm very happy with what I have.
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#7 |
Registered User
Join Date: Aug 2012
Location: Midland, TX
Posts: 1,267
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Re: Sound deadening
Click on my build thread and you'll see what I dead. Dynamat type material down first, closed cell aluminum backed insulation, MLV mass load vinyl, carpet insulation then carpet.
Not hard to do, but it is time consuming. ![]()
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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 |
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#8 |
Registered User
Join Date: Mar 2007
Location: Rohnert park, CA
Posts: 139
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Re: Sound deadening
To answer your second question yes it never hurts to Por-15 the floor before you sound deaden it
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#9 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Sound deadening
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Frank |
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#10 |
Registered User
Join Date: Oct 2013
Location: Vancouver,Wa
Posts: 339
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Re: Sound deadening
My friend uses the product from homedepot in the roofing area. 60% cheaper and it wooks great for heat resistant and sound. I'll post the name of it if I can get a hold of him.
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1968 C10, 250, L6 4spd OTF, Fleetside Upgrades: Power Steering .......................____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ |
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#11 |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Re: Sound deadening
Don't forget to do the inside of the outside door skin, makes a big difference in noise levels in your cab. It also sounds better when you close the doors, a nice thud instead of a loud clang
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http://smg.photobucket.com/albums/v655/aaronhero/ |
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#12 | |
Senior Member
![]() Join Date: Oct 2013
Location: Bay Area, CA
Posts: 493
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Re: Sound deadening
Quote:
Check this out: http://www.sounddeadenershowdown.com In my truck I have dampener and deadener in it, makes a huge difference. |
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#13 |
Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Sound deadening
Keep in mind if trying to use asphalt roofing stuff that the smell might be strong and hang around a lot longer than you'd like.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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#14 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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I used road kill and very pleased with it. I did a 12" square inside the door and then 4" squares in each corner of the doors. They shut now with a nice thud sound like a new vehicle.
I also put the bubble wrap down then the carpet. ![]()
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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#15 |
Registered User
Join Date: Apr 2004
Location: Las Vegas, NV
Posts: 2,188
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Re: Sound deadening
I used dynamat extreme in the doors and it made a huge difference, mostly with the stereo cranked (eliminated vibration in the doors from my 6x9s). I used LMC's sound damping kit in the cab with so-so results.
With my vent window rubbers shot, not much can be heard over the wind noise anyway... I need to take care of that soon.
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RIP EastSideLowLife '72 C20 SWB convert. 5 lug, LS1/4l60e |
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#16 | |
Registered User
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Location: St.Petersburg,Fl
Posts: 1,267
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Re: Sound deadening
Quote:
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#17 | |
Registered User
Join Date: Apr 2011
Location: Rapid City, SD
Posts: 104
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Re: Sound deadening
Quote:
The bulk pack is not enough. Doing mine right now. You will need about 4 more sheets. |
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#18 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: Sound deadening
I used Dynamat and very please with the results. I did the entire floor from the gas tank up to the bottom of the cowl, behind the gas tank, cab corners, inside the doors. Very little road noise, loud exhaust and I can hear the radio on low volume even at freeway speeds. I bought the 9 piece set (72 square feet) and had one sheet left over plus the scrapes. There's a few pictures in my album.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#19 |
Registered User
Join Date: Jun 2009
Location: East Brunswick, NJ
Posts: 70
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Re: Sound deadening
I used the peel and seal from home depot, two rolls of the 6 inch wide was plenty. That was two years ago and I have never had an issue with any sort of smell or other issues. If you look up the MSDS for dynamat and peel and seal you will find they are the same material, just slightly different thicknesses.
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#20 |
Senior Member
![]() Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,365
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Re: Sound deadening
I used B Quiet. I am very pleased and I got it of ebay with free shipping.
http://www.b-quiet.com/ultimate.html
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A husband can be right...or...A husband can be happy. ![]() 67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk. ![]() 1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc ![]() ![]() JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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#21 |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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According to the box it has 20 sq ft in each one and I used 2 boxes of it to cover the floor and up the back wall to the window and both doors and up to the fire wall in front. I left the factory stuff in place on the fire wall. I have 2 12" peices left in the second box. That would mean 38 sq ft is what I used. I didn't cover every inch of the floor are the back wall but I did a pretty good bit!
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__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 ![]() Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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