caleb22
1/2 ton status
I like the way my 89 sounds on the outside, I just want to quiet it down on the inside. Is there some cost conscious materials I can use to accomplish this? Matting under the carpet or maybe insulation in the panels/doors?
CK5
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Sound dampening
- Thread starter caleb22
- Start date
rug!
All Gm uses is "Jute" padding like they put under carpeting ..you could use foam too,like they use under carpets..I put that "Bubble Wrap" packing material I found at a warehouse where I got free pallets for firewood in my 79 C10 under the carpet--it cut the noise level down a lot,and it helps keep salt off the floors too.--I noticed much more heat in the cab now in the colder weather too..I haven't looked to se if it "sweats" underneath it though,my floors are galvanized 16 ga steel,so it probably won't matter anyway...I wouldn't use fiberglass house insulation..a shag rug,or one with a foam backing goes a long way to quiet road noise..
You can buy "sound deadening mats" at most body shop supply stores,but its pretty costly..looks like a hunk of roofing felt with tar on it if you ask me...
..it does work good though.. 
All Gm uses is "Jute" padding like they put under carpeting ..you could use foam too,like they use under carpets..I put that "Bubble Wrap" packing material I found at a warehouse where I got free pallets for firewood in my 79 C10 under the carpet--it cut the noise level down a lot,and it helps keep salt off the floors too.--I noticed much more heat in the cab now in the colder weather too..I haven't looked to se if it "sweats" underneath it though,my floors are galvanized 16 ga steel,so it probably won't matter anyway...I wouldn't use fiberglass house insulation..a shag rug,or one with a foam backing goes a long way to quiet road noise..
You can buy "sound deadening mats" at most body shop supply stores,but its pretty costly..looks like a hunk of roofing felt with tar on it if you ask me...
..it does work good though.. Robert D
1/2 ton status
There is also sound-deadening material like...dynamat...I believe that is the name. Crutchfield should sell it. It is used to deaden the outside noises to keep a clear sound stage for a stereo install. The stuff comes in sheets of different sizes and different levels of sound quality. I'm not sure what it is made out of, but I'm sure it can be "mimicked" with some sort of foam...
Do a search in the "Audio" forum for the term
Polymeric Mastic
It's a generic version of Dynamat. Works great for about 1/6 the price. Sold my McMaster-Carr. You should be able to find all the part numbers, etc with the search results you get.
Polymeric Mastic
It's a generic version of Dynamat. Works great for about 1/6 the price. Sold my McMaster-Carr. You should be able to find all the part numbers, etc with the search results you get.
Robert D
1/2 ton status
Sweet, I had no clue of that stuff. I didn't realize how loud this truck actually is after not driving my old 944 for 2 1/2 months prior to owning this truck...I drove my roommates Dodge Ram last week and was so suprised at not hearing anything from outside the car. It doesn't look like I'll be using sound-deadening on my rig as I plan on removing the top during summers so keeping it quiet won't be necessary.
caleb22
1/2 ton status
Thx Greg, sounds like what I'm looking for. With the strong adhesive backing I'm sure that will help around corners also.
grimjaw
1/2 ton status
I used foam insulation (think home) between the headliner and the roof. Works great and was cheap.
86Cucvbeater
1/2 ton status
I was thinking of putting bedliner on my floorboards. Shouldn't that quite the cab some?
chevyin
1/2 ton status
If you buy mat, only buy butyl rubber based. The older asphault based (sometimes called mastic) stuff cannot even compare to the newer butyl rubber stuff.
4xcrazy
3/4 ton status
I read the title as "sound dampening" and the first thing that came to mind was "Put the pillow FIRMLY over her mouth"sorry
MrArmyAnt
1/2 ton status
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What wont hold water? most sound dampeners have little air pockets as air and objects help to deaden sound, solids carry sound faster. if i drown my car (same reason why i am putting an all marine sound system in) those mats will act like spunges and rust out. anything else?
Get some closed cell foam sleeping pads, sold for camping. They're cheap and won't absorb water. Cut to fit and glue into place. I'm planning to put it on the walls behind the rear side panels on my Suburban, as well as inside the rear barn doors.
Years ago I put R13 house insulation down both sides of a Blazer, behind the rear side panels. It made the interior a LOT quieter!
Years ago I put R13 house insulation down both sides of a Blazer, behind the rear side panels. It made the interior a LOT quieter!
chevyin
1/2 ton status
Yep, any closed cell foam will not absorb/hold water, because well, the cells are closed. 
This is also the superior type to open cell foams for sound deadening/absorbtion. Basically what Im saying is you should only use closed cell type foams for this type of stuff anyway, and it wont cause any problems with holding water.
This also holds true with sprayable expanding foam. They make both types, only use closed cell types.
This is also the superior type to open cell foams for sound deadening/absorbtion. Basically what Im saying is you should only use closed cell type foams for this type of stuff anyway, and it wont cause any problems with holding water.This also holds true with sprayable expanding foam. They make both types, only use closed cell types.
MrArmyAnt
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chevyin said:Yep, any closed cell foam will not absorb/hold water, because well, the cells are closed.
This also holds true with sprayable expanding foam. They make both types, only use closed cell types.
You ever actually fill anything with that? Like the inside sidewall ccavities? Hadn't thought of that. Seems like it would strengthen it quite a but vs. weuight, although it might float
. What if rust is already there? Won't spraying it over it or attaching it to it allow it to continue to rust?
