Bed liner over insulation

[UTfball68]

So I'm getting my 79 Bronco back to reliable dd/wheeler status. I've had cheapo carpet in it since I bought it from the PO...after hauling parts and absorbing grease, etc...the carpet smells and I want to do away with it.

With 36x14.5" TSLs and 12" cherrybombs, I wouldn't mind cutting down on some noise to have a conversation...so I would like to cut down on sound. I also wouldn't mind keeping the Bronco cooler in the summer and warmer in the winter. So after some reading, I found alot of guys say the following Peel and Seal is just about identical to Dynamat eXtreme:

http://www.lowes.com/pd_154017-81326-PS625_0__?storeNumber=0495&Ntt=peel and seal roofing&UserSearch=peel and seal roofing&selectedLocalStoreBeanArray=[com.lowes.commerce.storelocator.beans.LocatorStoreBean@29512951]&productId=1018733&ipTrail=204.155.99.89&rpp=32

From what I've read, general consensus seems to believe that cuts out 7-11db of cabin noise. And I should only need somewhere between 5-7 rolls depending on how extensive I get with coverage.


Now my question comes here...as I said, I'm trashing the carpet, and am looking for something that I can just spray out. Which naturally leads me to bed liner. Everyone and their brother is telling me it can't be done. First of all, I understand foil doesn't promote the best adhesion, but I don't think it's impossible. Secondly, I'm the kind of guy that will do something when everyone else tells me it can't be. Problem being, I'm stupid...so I need your help.

While digging, I came across this old Jp Magazine article, that doesn't have much detail, but they rolled Herculiner on to Dynamat...unless the foils have different adhesion properties, what's the difference???

http://www.fourwheeler.com/how-to/body-chassis/154-0608-august-2006-jeep-cooling-kits/

I was also thinking about scuffing the foil and laying down a self etching primer and then rolling something on. Or possibly even laying down some fiberglass and then rolling on. So what says you guys???



Also worth noting, general consensus seems to believe cabin noise is reduced by 2-4db with just bed liner. So between the insulation and bed liner, 9-15db reduction sounds pretty good to me. And in some extreme heat, temps were recognized as being about 45* cooler as well.

 

[jeepinmatt]

I think your numbers are quite optimistic. I recently did a bunch of sound measuring on my 03 Duramax (LT with carpet and stuff like that). I also have Dynamat in the doors and behind the rear seat. At a stop, its about 59-60dB, country roads, its 67-69dB, rolling down the interstate its 70-73dB depending on whether the mechanical fan is on or not. I just installed an MBRP exhaust, and it made no difference in the dB readings at any of those speeds compared to stock, as the driving factor was the tire noise, followed by engine fan noise, followed by AC fan noise. On the interstate with the windows down, it was about 72dB, windows up was about 70dB. The MBRP with muffler but no resonator was much louder than stock, but did not affect the total dB reading in the cab.

 

[UTfball68]

Interesting. I figure most of the numbers I saw were embellished for internet readers...but at this point, I think something is still better than nothing. Right now, the only thing between floor steel and my feet is what looks like black pool table felt.

 

[Will Carter]

I'd probably shoot for a 1 or 2" gap of exposed floor between your different panels of insulation. Your best bond is going to be to that factory paint on the floor. Then you'd at least have separate bonded compartments over the insulation should the liner not want to adhere to the foil very well.

 

[Caver Dave]

I think your numbers are quite optimistic.

And even if they weren't, 7-10db is piddly...

Decibel: the sound volume made from a mouse pissing on velvet...