Sound matting, dynamat or similar, how many QSFT

[Rusty Marlin]

I estimate it'll take 66sqrft to do the 4 doors, sides of cargo area and tailgate.
For those that have done this, is that sounding reasonable. Just double checking my math.

 

[voodu3]

That sounds about right. I used this as a guide for the measurements when I did my floor. Calculation per car - Noico Solutions - Quantity of material
I rounded up to the next full box. The Noico came in 36 sqft boxes so I got two and I had a few extra pieces left over.

 

[haulin auss]

That sounds about right. I used this as a guide for the measurements when I did my floor. Calculation per car - Noico Solutions - Quantity of material
I rounded up to the next full box. The Noico came in 36 sqft boxes so I got two and I had a few extra pieces left over.

This sounds about right for the floor. I just used Noico to do everything but the ceiling and ended up using 4 boxes, which was definitely overkill.

 

[Rusty Marlin]

I'm not pulling the carpets out at this time, it will just be the 4 doors and the cargo area walls.
Thanks for the calculator... hadn't seen that.

 

[alia176]

I read a study long time ago that 25% coverage is sufficient for sound deadening. More than this amount, you'll get deadening but not a linear amount. But I see that 25% is the wrong amount by one vendor while another one touts is!

I'm confused!

from Heatshieldproducts.com

For those of you looking to "Sound Deaden" your truck!

Hey guys! I've seen a lot of posts recently with people going crazy covering their interiors with Dynamat. I wanted to inform you that you are doing it wrong. Dynamat or (CLD) Constrained-Layer Deadener wasn't designed to block or absorb sound. It was designed to absorb vibrations. While CLD is...

powerstrokearmy.com

 

[Heckraiser]

I've read some very in-dept articles and the lesson, as my foggy memory can recall, is that you only need 20-40% coverage with the stick-on foil stuff that goes on the panels. This just dampens the vibrations of the panels themselves. But to have truly effective sound deadening you need a 100% layer of mass-loaded vinyl or some other barrier product, which should be sealed (taped) at the seams and as close to 100% as you can reasonably get. Sometimes an additional layer of decoupling material goes in between the two. May be overkill, but the research seemed pretty solid.

At any rate, the job of the stick-on stuff is really just to stop your metal panels from rattling around, not to provide a sound barrier, so you reach a point of diminishing returns once you're past 20-40%. They say just stick it on in squares here and there across the panel. I'm sure someone will link the article I'm thinking of.

 

[Rusty Marlin]

So 66sqrft is total overkill; need half that; a 35 sqrft roll is more than adequate for what I'm doing.
I'm not looking to turn my land cruiser into a sound chamber like a Rolls Royce, I'm just trying to kill some buzzing and road noise.
Thank you for the great info.

 

[NLXTACY]

Mass loaded vinyl is my next project in the turbo truck. I need to look into it some more.

 

[MrMikeyG]

Any offhand pros/cons of removing all of the old factory stuff? Those that have thread here regarding the removal, it seems like a lot of work if one can simply apply new over old.

 

[NLXTACY]

Any offhand pros/cons of removing all of the old factory stuff? Those that have thread here regarding the removal, it seems like a lot of work if one can simply apply new over old.

Apply over old BUT a crazy simple way to remove is get crushed dry ice in a bag and lay it over the asphalt. Then crack the pieces with a hammer and remove.

 

[Milogreen]

I just did the dry ice thing, leave it on for 10 minutes or so till you hear it snap crackle and pop and you can basically lift it out. Have some cardboard and tape if you want to remove the deadner on the verticles. There is a youtube video on here showing some Aussie guys using dry ice to remove it in an 80. The dry Ice makes short work of it. If you have a lot of the jute backing glued to the floor take a manual wire brush and remove as much as you can so you get good contact.

USING DRY ICE TO REMOVE FACTORY SOUND DEADENING. SUPER EASY WAY!

forum.ih8mud.com

 

[Kernal]

IIRC some people who've completely covered their floors in a sound damping material have said afterwards there wasn't much difference in road noise before versus after?? Anyone have other results?

 

[NLXTACY]

IIRC some people who've completely covered their floors in a sound damping material have said afterwards there wasn't much difference in road noise before versus after?? Anyone have other results?

I can say right now that is bull****. I dyno lined every inch of my SC'd 80 and its a major difference.

 

[Cruiserhead05]

IIRC some people who've completely covered their floors in a sound damping material have said afterwards there wasn't much difference in road noise before versus after?? Anyone have other results?

I think it's because the wrong material was used. It goes back to the earlier point of vibration dampening Vs. sound deadening. Different materials with different intended purposes. If you look at Second Skin Audios website they break it down into categories: deadening, blocking and absorption.

Many years ago, I did a layer on the entire floorboard of the buty-backed vibration dampening (second skin damplifier) material, then followed by two layers of their brush on "spectrum". Both of these products appear to have a primary purpose of vibration reduction. I didn't realize it at the time and while it did make an improvement, it was not the right product for the intent goal.

Personally, I think the build quality of the 80 lends itself to having very few vibration related issues (subjective opinion) relative to many other vehicles. As a result, whenever i get around to this project again, I'll do a small amount of butyl, but focus most of my efforts on mass loaded vinyl for the floors and doors.

 

[musthave]

I estimate it'll take 66sqrft to do the 4 doors, sides of cargo area and tailgate.
For those that have done this, is that sounding reasonable. Just double checking my math.

I've done a few 80's and am doing my 3rd 100 series cruiser using Second Skin products. I use the 3 layer process for doors, walls, etc. Damplifier pro, spectrum spray, then luxury liner pro. I've been using the Mega Zorbe product on the ceilings. I've used Dynamat in the past, but as others have said, I didn't notice nearly the difference. Once you do the 3 step process on an 80 and do the firewall and underside, you can't hear the mud terrains as you roll down the road. It's that good.

I do recommend taking up any of the old jute and as others have said, dry ice does the trick every time.

As I'm doing my 4th 80 now, I have templates for the damplifier pro and the Luxury Liner pro. I am considering offering a package to people here that provides them everything they need to do 1, 2, or 3 layer process on their vehicles. We'll see what happens.

I just completed doing the engine compartment of my 80 while doing the head gasket. That's a little crazy for a "while you're in there" but it was the right time to do it.

Here are pictures of the 100 that I'm working on now for a customer.


Completed part 2 of sound deadening for a customers 100 series. 1st layer was damplifier pro by SecondSkin, 2nd part is Second Skin Spectrum. 3rd part goes in this coming week. It’s a time consuming process and a labor of love. The results are absolutely incredible. It’s like driving in a casket while the tornado sling aluminum cans at the cruiser. You hear nothing. Sorry, best analogy I’ve got. You can see the damplifier pro underneath the Second Skin.

 

[davidp14]

This may be a dumb question but is this stuff waterproof?

For example, what if a deep water crossing goes wrong? Will the dampener hold moisture? Or, if I do this have I relegated my LC to road duty only?

 

[musthave]

This may be a dumb question but is this stuff waterproof?

For example, what if a deep water crossing goes wrong? Will the dampener hold moisture? Or, if I do this have I relegated my LC to road duty only?

I don't know that it's "waterproof", but I have had water in the doors and on the carpet and everything dried out just fine. No issues at all.

 

[Bludozer]

I've done a few 80's and am doing my 3rd 100 series cruiser using Second Skin products. I use the 3 layer process for doors, walls, etc. Damplifier pro, spectrum spray, then luxury liner pro. I've been using the Mega Zorbe product on the ceilings. I've used Dynamat in the past, but as others have said, I didn't notice nearly the difference. Once you do the 3 step process on an 80 and do the firewall and underside, you can't hear the mud terrains as you roll down the road. It's that good.

I do recommend taking up any of the old jute and as others have said, dry ice does the trick every time.

As I'm doing my 4th 80 now, I have templates for the damplifier pro and the Luxury Liner pro. I am considering offering a package to people here that provides them everything they need to do 1, 2, or 3 layer process on their vehicles. We'll see what happens.

I just completed doing the engine compartment of my 80 while doing the head gasket. That's a little crazy for a "while you're in there" but it was the right time to do it.

Here are pictures of the 100 that I'm working on now for a customer.


Completed part 2 of sound deadening for a customers 100 series. 1st layer was damplifier pro by SecondSkin, 2nd part is Second Skin Spectrum. 3rd part goes in this coming week. It’s a time consuming process and a labor of love. The results are absolutely incredible. It’s like driving in a casket while the tornado sling aluminum cans at the cruiser. You hear nothing. Sorry, best analogy I’ve got. You can see the damplifier pro underneath the Second Skin.

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Any idea of the added weight of the entire 'three step process?' Definitely sounds worth going through that trouble.

 

[RS6tofj80]

I've done a modified 3 step process on my last three 80's - fatmatt, boom spray and foam dampner on larger panel and my current CE is quieter then my wife's truck even on worn mud tires... I still have to do the firewall and recall from my last 80 that really made a difference.

worth the time IMHO - I think I used 150sf of fatmatt so far.

 

[musthave]

Any idea of the added weight of the entire 'three step process?' Definitely sounds worth going through that trouble.

On the last 80 I did I weighed it as I added it. For 3 steps, firewall, tailgate, and roof it was right at 180 pounds. Keep in mind, that is disbursed throughout the vehicle. The only really heavy stuff is the Luxury Liner Pro, it's heavy. The megazorbe for the ceiling is super light. The spectrum is heavy but it's sprayed to 2 to 3 mil and isn't a lot of weight.