Under carpet material

[racefaith]

Hello and next interior rest question.

Car is out and new kit ready to be installed. Their was one prior restoration that was done about 15 years ago which included a floor pan replacement. At that time they seem to have placed a layer of "aluminum" topped adhesive material to the floor which I am guessing is first a heat barrier and secondarily for sound deadening. It hasn't been fun removing it but we're on our way. It was very well placed and molded to the floor and frame contours.

? - what material have folks placed down under their carpet re-fits? Im wondering if there is something preferable for both sound and heat?
thanks in advance.

[RobSirg]

Hi, I believe that Al'n backed material is called Dynamat? and is quite superior for sound and heat insulation.
I plan to place the black 3mm sheet bitumen-like material on the floor pans to keep it original. I believe these cars didn't have underfelt fitted beneath the carpet originally, but I found the carpet 'sat' better ( flatter) if you glued underfelt to the back of the carpet itself. ( pretty sure I read that tip in the forum somewhere). Gives a better finish to the carpet, better heat and sound insulation and even satifies the purists (some) when they lift your carpet to inspect the floorpans to see if you have the original material or some loose underfelt lying there. As a "would-be" purist I don't like the thought of someone seeing some shiny modern material when they lift my carpet.

Cheers

Rob

[Raymond]

As a car owner, I don't like people looking under my carpet!   
If you are not fighting for every point in a Concours judging, I'd go with the Dynamat or similar.  The stuff is designed to provide a density to block road noise and reduce vibration.  I find it worked well in my car providing a noticeable damping of the rumbles under the car.  The only issue is the foil backing makes it easy for the carpet to slip about so you'll have to take steps to tack it down at the corners.

[Bonnyboy]

I spray painted my dynamat flat black so you can't see the foil covering.  It holds the carpet better as well.

[jerrycastillo]

My car is having the rusted floor pans replaced. The shop doing the job suggests coating the floor pans and tunnel inside the car with Rhino liner to prevent rust, then painting it to look like factory and place Dynamat on top of it to deaden noise before laying the floor mats. Any thoughts will be welcome as I would like to preserve authenticity and at the same time avoid future rust.

Jerry

[Shvegel]

Rhinoliner is very rough. getting dynamat to lay down over it would be near impossible.