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#1 |
Active Member
![]() Join Date: Feb 2022
Location: PLANO, TX
Posts: 135
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Sound barriers / Interior insulation
Wondering what are the good and not so good interior insulation options?
It seems like not a lot of area but when going threw the books it adds up pretty quick dollar wise so I am asking what ya'll can point me too? The Classic Industries Catalog alone has many options that all look good. As always Thanks in advance!
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1955.1 GMC 100 RestOMod 1972 T120RV 1967 C200 Trail 90 2014 TRD Quad CAB |
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#2 |
Registered User
Join Date: Dec 2011
Location: Moxee WA
Posts: 1,470
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Re: Sound barriers / Interior insulation
Check out water heater insulation at Home Depot or Lowes. Both are peel and stick so the floors etc must be clean of all debris. Then add a layer of jute rug padding with carpet on top. you should be cool and happy. Also, make sure you use the silver tape over all holes and all gaps. It wont be as quite as a new Lexus, but its better that bare floors with a rubber mat.
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49 chevy 3100 3 window. 327 / m21 4 spd, 12 bolt w/ 3:55's Bought in 1973 for $235.00. Had it longer than my wife & Kids!! |
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#3 | |
Senior Member
![]() Join Date: May 2007
Location: Doodah Kansas
Posts: 7,773
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Re: Sound barriers / Interior insulation
I wrote this up a while ago and will repost it here.
Quote:
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the mass of men live lives of quiet desperation if there is a problem, I can have it. new project WAYNE http://67-72chevytrucks.com/vboard/s...d.php?t=844393 |
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#4 |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,507
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Re: Sound barriers / Interior insulation
I missed that the first time but well done Joedoe.
From what I have seen both heat and sound insulation have advanced greatly in the past few years. Sound, it doesn't hurt to get over into the car audio groups and see what they say about various materials. They discuss not only materials but tricks to deal with those drumming panels that sometimes amplify outside sound or have their own sounds as air moves past them at speed. I'm tired of heat and tired of outside noise that I don't want to hear with the windows rolled up and the AC or heater on. I don't need it as quiet as my BMW or Cad DTS were but outside of a bit of wind noise all I want to hear is my pipes when I want to and the sounds I have to hear. I've been looking into Lizard skin but you have to buy separate products for heat and sound.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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#5 |
Registered User
Join Date: May 2021
Location: Spokane, Wa
Posts: 263
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Re: Sound barriers / Interior insulation
Trying to maintain the stock look on a heavily modified truck, I applied Lizard Skin on the entirety of the inside of the cab. Inside the dash, firewall, roof, floor, and inside the doors. applying extra on surfaces that I sanded flat. The product goes on like paper mache thru a straw, so lots of splatter. It greatly eliminates the oil can affect on all the surfaces. I thought it would be easier to apply in tight spaces compared to rolling out other products...and when sanded flat it looks like it's the stock surface. It is a bit of work, but I couldn't have achieved the look on all interior surfaces, including floors and kick panels. I've also installed the stock inside firewall insulated heat pad, just for extra. Still working on getting it on all 4s, but I honestly think that Lizard was worth the extra expense and work.
I do have to say that all of the products that I purchased for this truck project 3+ years ago has gone way up in cost. I'm glad I went insane when starting this endever and spent almost a small fortune then doing bulk orders on almost everything. Don't want to think of what it will cost in the next 3 years. But don't listen to my lunatic rantings. It may lead to bankruptcy and divorce.
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Chip '51 Chevy 3600 5 window C4 Vette front/rear suspension & drive train full Rusto-Mod ![]() '92 GMC Sonoma GT VIN #0015 '91 GMC Sonoma GT extended cab 1 of 1 Last edited by fauXGT; 07-29-2024 at 02:19 AM. |
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#6 |
Registered User
Join Date: Jan 2017
Location: Derby Kansas
Posts: 371
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Re: Sound barriers / Interior insulation
I've thought about using ATAC from DEI. It's supposed to be heat and sound deadening. It's a one coat for both and cheaper than lizard skin by the time you buy the heat and sound. Anyone used it before?
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#7 |
Registered User
Join Date: Nov 2013
Location: Show Low, Arizona
Posts: 771
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Re: Sound barriers / Interior insulation
Here's what I did to address the points Russ made in his write-up
"knowing that, seal the direct paths: holes in the firewall, floor, doors and door jambs, anywhere that air can leak in." Every panel that was removable, like the transmission cover and battery cover, I sealed with a gasket made from 3/16" closed cell foam. I used the Steele Rubber products on the doors and used the 'dollar bill' test to make sure there was contact everywhere. I run stock pedals so I found some rubber gators to replace the factory felt seals. For the steering column firewall penetration, I used Dumdum on the interior side and a boot on the firewall side to seal it. I found a Dodge shift boot and a substantial chrome trim ring that I mounted to the floor with nutserts so I could pull it down for a good seal. ..... adding mass (usually asphalt) to a panel lowers its frequency, and lower frequencies are much harder to reproduce and need a lot more power. You can do it cheap with the foil-lined asphalt stuff from Home Depot, but it stinks (literally, especially in the Arizona heat). Killmat is about the cheapest alternative and that's what I used (Made in Russia - kinda strange) I had 100% coverage on the floor, underneath the seat, as far up the firewall as I could get it and the back of the cab, and on the roof. For the doors, I only covered about 40% of the door skin. As Russ mentions, complete coverage is probably overkill, but it came in 30SF boxes and I kept applying it till it was gone. As Mr48Chevy suggested, I also looked at some of the car audio guy's suggestions, and I put a 1/4" layer of closed cell foam over all the interior surfaces I'd installed Killmat on. The upholsterer who did the carpet put a nice jute pad, and that helps a lot. He even put jute and carpet under the seat. He also put carpet up the wall of the cab in back of the seat and carpet under the seat cushions, which probably helps a little with sound absorbtion in the cab. All-and-all, I have about $100 in Killmat and foam, and maybe another $100 more in pedal gators, shift and steering column boots/bezels Pic of the boots and bezels for sealing up the floor. (floormat is just a coconut door mat from HD that's been edge banded) ![]() Killmat before the foam installation on the roof ![]() Last edited by e015475; 07-29-2024 at 03:47 PM. Reason: add photos |
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#8 |
Registered User
Join Date: Aug 2016
Location: Hunkered Down
Posts: 1,843
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#9 |
Active Member
![]() Join Date: Feb 2022
Location: PLANO, TX
Posts: 135
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Re: Sound barriers / Interior insulation
@e015475 What a beautiful floor board!!!!
I tend to agree with @Vintovka "No noise when parked" meaning I will do my best but not kill myself when doing it. My interior will never sound as good as my living room ![]() Thanks ya'll for all your input!!
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1955.1 GMC 100 RestOMod 1972 T120RV 1967 C200 Trail 90 2014 TRD Quad CAB |
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#10 |
Registered User
Join Date: Aug 2016
Location: Hunkered Down
Posts: 1,843
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Re: Sound barriers / Interior insulation
I have heard some amazing high quality sound systems in AD's at shows. Some cost thousands and almost all the owners admit they actually sound no better than a cell phone with bluetooth speakers when driving. I am shocked how many who enjoy loud systems are now severely and permanently hearing impaired. As their hearing loss increases they turn the sound up to point its actually painful to others without realizing it. Then they wonder why their kids can't hear them as well. Local radio stations who provide loudspeaker music at car shows are the worst. They are mostly deaf and shocked when e been "dis-invited" to attend future shows. Seen many complaints especially from those with small children. At one show my insulation efforts paid off as i hid in cab to escape blaring "music".
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#11 |
Registered User
Join Date: Jan 2012
Location: Motown
Posts: 7,680
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Re: Sound barriers / Interior insulation
I did a soundproofing write-up in my build thread. I had rhino liner sprayed on the underside of my cab and fenders, plus the inside back wall Two layers of fatmatt and a layer of ensolite foam on the floor inside, back wall and firewall. Ensolite foam on the roof under the headliner. Fatmatt inside the doors.
After all that, I'm gonna say that the 1000 watts of stereo probably is the best thing for an old truck. If you can't mask the noise, drowned it out.
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cool, an ogre smiley ![]() how to put your truck year and build thread into your signature shop air compressor timer |
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