OK, I have the fatmat down on the floor pans, package tray and the back seat panel. Now I am wanting to know if anyone has used the fatmat on the roof?? Under the headliner, I took it down to bare metal and plan to paint with Zerorust. Just want to know if the fatmat will stay there once i get it in??

Thanks, Mark

 

Mark I hope you find an answer to your question.
I have been wanting to know what to use myself.
I scraped off the paperlike material from the factory
because it was just disintegrating anyway.
It will have to be very thin whatever we use, yes?

 

I would use something very flexible and lightweight.
One of the cheap generic fiberglass hood insulation pads could be cut to fit and secured with 3M 8090 trim adhesive.

 

I used FatMat under my roof. so far so good. It stuck up there very nicely. I had to remove a piece to re do it and it was a little difficult getting it off.

 

Gary,

Thats what I wanted to know! I wanted to use the fatmat, just wondered if it would stay in place.
Thanks

 

Where I dive my car, I'm more worried about thermal insulation on the roof. I put fatmat on the floor, firewall, doors, etc... but I just left the original insulation on the roof. On 100 degree days you'll be more concerned about heat radiating off that more than noise.

 

Gary,

My original insulation was coming off due to a pinhole under the vinyl roof. So, my daughter and I spent yesterday afternoon scraping it all off and cleaning the residue. I plan to paint with zero rust and then use the fatmat as sound and heat insulation.

 

I used Fat Mat on my roof and then glued the repro felt style insulation to the FM. I have had no problems with it. I did it over two years ago and I a happy with it.

Adam

 

Just in case you are putting the headliner in yourself here is a very good article that I used to install mine. I had never attempted to install one before but this helped me out tremendously. My headliner came from Legendary Interiors although they did not manufacture it. also I would highly recommend you replacing the headliner bow clips will make the installation much easier when you try to press the bows in.
http://www.chevelles.com/forums/showthread.php?t=161372

 

I'm with you on that! Same here!
AL

 

Remember that the factory material was really there to deaden the large expanse of sheet metal and prevent "drumming."
If you want to use a lighter foam or fluffy insulation, you will need a "mass" insulation like FatMat or asphalt underneath, to keep the sheetmetal from drumming.

- Eric

 

@ Gary thanks for the tips on installing the headliner... This should help me out

 

If you like the smell if it gets over 90 in your car in the summer...

 

The original anti-drumming material was an asphalt-coated paper.

Perhaps the asphalt compound wasn't the same thing as what's under your tires, but it was made of petrochemical cracking dregs, or asphalt.

- Eric