Outer Roof Skin - Sound Deadening/Proofing

[Tank6x2]

Has anyone replaced these panel spacers with legitimate sound deadening like killmat? I had two layers of it to support between inner and outer panel - going to finish prepping the top side interior roof panel & rust coat - then was thinking I would be able to get rid of a little road decibels by layering the sound deadening material before final installation of the outer skin.

Thoughts are welcomed please!

 

[PrairieDrifter]

I'd probably keep an air gap in there. Paint it then maybe a wax coating, like factory did in some areas. Would definitely help sound and temp though. Maybe an aerosol deadner.

 

[TotalyHucked]

I would use a rust inhibitor paint and then maybe just put enough Kilmat to match what the factory had. Like Mason said, I'd wanna keep some air gap in there

 

[Tank6x2]

I'd probably keep an air gap in there. Paint it then maybe a wax coating, like factory did in some areas. Would definitely help sound and temp though. Maybe an aerosol deadner.

I would use a rust inhibitor paint and then maybe just put enough Kilmat to match what the factory had. Like Mason said, I'd wanna keep some air gap in there

I was also along the same line of thinking of definitely paint and kilmating enough to build up what was there to, maybe leaving the centre open, put a bit of wax in the low spots, air gap / flow is a good point but with the air you get sound to some respect, curious what factory’s thoughts were on it/ an autobody guys opinions were, I wasn’t shocked, I assumed sound and panel vibrations like the hoods on 67-72 Appreciated guys!

 

[PrairieDrifter]

They did the double wall as their "insulation". My 70 hood is awful as well lol.

If truly worried about the roof I would do the inside and then do a headliner. If in the desert you won't have to worry about moisture as much.

 

[Tank6x2]

They did the double wall as their "insulation". My 70 hood is awful as well lol.

If truly worried about the roof I would do the inside and then do a headliner. If in the desert you won't have to worry about moisture as much.

It’s the heat that makes me think it would sag in summer, only 90-110°f in summer 35-42°c

 

[PrairieDrifter]

It’s the heat that makes me think it would sag in summer, only 90-110°f in summer 35-42°c

A quality sound deadner will not. Especially on the inside of a double wall.

Single wall suburban. We get plenty hot here. Not a single spot has an issue. Floor pans get way hotter but obviously no gravity issues.

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