Sound dampening

[scenic760]

In pulling out all my boxes of stuff to put this Suburban back together, I found my boxes of Kilmat...

I have (2) 36 sq ft boxes and vaguely remember my plan to be do the floors with the Kilmat and with the ceiling, doing foil backed foam in between the headliner almost like a wall assembly. Also I was planning to Kilmat the doors, under the door panels.

I have read several of the threads on sound deadening and had a couple of questions now:

1. If I don't put Kilmat on the ceiling, will the insulation and headliner muffle enough of he sound or is it just going to resonate through the interior?
2. I see a lot of people putting the Kilmat on the inside of the door's exterior skin. I see why this would be superior to door under the plastic panels but seems like a REAL PITA. Does it make THAT much difference?

Thanks all!

 

[TotalyHucked]

Can't answer about the ceiling as I have never applied it up there. But as far as the doors, it makes a HUGE different putting it on the backside of the outer skin. I've done this with both newer trucks and vintage ones. You don't need much either, I just put 1-2 squares of whatever size I can fit through the access holes in the door. It just takes the "tinny"-ness out of it.

 

[Bloodhound1981]

I definitely agree with the Kilmat on the outer door panel. You don't need to use a lot, there or anywhere else. I put one sheet inside each door and totally killed the tin sound. I did the roof as well before adding the headliner, and you don't have to go crazy over every square inch to get good results.

 

[PrairieDrifter]

Agreed on the doors. It does completely change it.

My burb was unbearable in rain storms until I did the roof. It was sooo loud. Cut down the resonance a lot after the roof like in general. Helps the sound system too lol. Does help with temp as well. I'll be doing the closed cell foam as well.

That said, I haven't had a headliner since I tore the old junk out, even after the deadner. Someday.

You must be registered for see images attach

 

[scenic760]

Agreed on the doors. It does completely change it.

My burb was unbearable in rain storms until I did the roof. It was sooo loud. Cut down the resonance a lot after the roof like in general. Helps the sound system too lol. Does help with temp as well. I'll be doing the closed cell foam as well.

That said, I haven't had a headliner since I tore the old junk out, even after the deadner. Someday.

You must be registered for see images attach

CLEAN install!!

 

[PrairieDrifter]

CLEAN install!!

Appreciate it! Pictures are good at hiding flaws lol. 5 sheets of 24x48 will do the roof dang near perfect if you take your time lining them up.

 

[MikeB]

I'd be concerned that material on the underside of the roof may come loose, due to the roof's exposure to the sun.

Then again, if you live in North Dakota...

 

[Frankenchevy]

I'd be concerned that material on the underside of the roof may come loose, due to the roof's exposure to the sun.

Then again, if you live in North Dakota...

Once you get most CLDs applied to a well prepped surface and rolled down, they are pretty unlikely to ever come off without quite a bit of effort.

 

[TotalyHucked]

Yeah I know a bunch of people in the SE that have put that stuff on their roofs with no issues.

 

[Fat 454]

i'm really conflicted about using this stuff. It has been a HUGE job to remove from previous projects, and have found that it traps moisture on the floor leading to rust. I am NOT putting this stuff back in our new truck after a full internal clean out and respray, and am going to try a combination of the old school felt and a layer of foil for heat under the OEM floor mat. At least that can be pulled up to check for moisture from time to time.

I am sure I am in the minority here, but am willing to sacrifice some comfort for ongoing maintenance of the truck body ( mind you we don't live in the desert anymore ... )

 

[PrairieDrifter]

I'd be concerned that material on the underside of the roof may come loose, due to the roof's exposure to the sun.

Then again, if you live in North Dakota...

Hasn't budged at all. We get over 100F and high humidity too. Don't you worry about that!

Right now it is -15F without windchill lol

 

[Frankenchevy]

i'm really conflicted about using this stuff. It has been a HUGE job to remove from previous projects, and have found that it traps moisture on the floor leading to rust. I am NOT putting this stuff back in our new truck after a full internal clean out and respray, and am going to try a combination of the old school felt and a layer of foil for heat under the OEM floor mat. At least that can be pulled up to check for moisture from time to time.

I am sure I am in the minority here, but am willing to sacrifice some comfort for ongoing maintenance of the truck body ( mind you we don't live in the desert anymore ... )

You could try lizard skin. It’s a paint on deadener.