Best thermal and sound insulation for floor and headliner

[Charger Fan]

I'm close to installing the new carpet and headliner on my '73 Charger. I want to install good sound and thermal barriers on the floor pan and roof before installing either. There are lots of products on the market with various prices. Any recommendations on a good overall product out there that will achieve both thermal and sound barrier protection?

 

[Davefinan]

I , also , am interested in some advice on this. Just got a 76 b100 van and it’s a blank canvas right now

 

[Biopack]

I used the Kilmat product. I recommend the 80mm and it is available from Amazon.

 

[71Beeper]

Good ol Dynamat, but the stuff is stupid $$$.

 

[themechanic]

Just checked the links at the bottom.

Sound deadener/insulation recommendations

I’m looking at different products for lining under the trunk mat, under the interior carpet, and between the roof and headliner. I’m aware of Dynamat, FatMat, KILMAT, & Noico in various thicknesses. Have any of you used these products, and what are your recommendations, and tips? Would you use...

www.forbbodiesonly.com

 

[Don selleck]

I just ordered some of the el cheapo stuff for around $1.50 a sq. ft. should be here in a few days will get back if its any good for install, adhesion, etc. Bought the Dynamat before, was nice stuff, but around $7 a foot. that's a hell of a price difference. I could double it up and still cost less than half.

 

[440 4 speed]

Some people use the insulation that is used on furnace ductwork. Say they like it. Home Depot sold it at one time.

 

[eldubb440]

if it's an empty shell, lizard skin sound deadener and thermal insulation is an easy spray in

 

[j-c-c-62]

Maybe stating the obvious, in generalities, insulation solutions for thermal and acoustic issues often have opposite attributes. Best solution is to use a sperate solution for each issue based on need. Everything else singly is just a compromise to some degree. Both solutions are tasked usually with reflecting the concern, or dampening the concern, and sometimes both. There are no silver bullets. Each case is different.
Case in point, reflective surfaces reflect infrared heat well. However, having it on the inside surface of an interior primarily only efficiently reflects heat back inside the car, but it sure looks pretty. Dark/Black surfaces emit heat rather well vs light/white colors. Acoustically, mass dampens sound well, light thin materials do not. Thick stiff, solid materials reflect sound better.
The best and most overlooked solution IMO, just reduce the source of the problem first.