Install Sound Deaden material on floor boards?

[Have914]

Has anyone installed sound deadening sheets on the floor boards under the rugs? Does it make for a much quieter ride?

[ChrisG]

Depends what you call quiet.
Some people think that it makes a difference - others don't.
A word of advice though. I have just added a 1970 VW Type 3 Fastback to my drive (in addition to the 914) and that still had all of the sound deadening attached.
After looking over the heater channels I decided to take a look under these SD's.
Rust, rust, more rust and holes.
Needless to say if you car is spending time in wet conditions (like over here in the UK) you could do no worse than forget the SD's.
Our 914 has a similar problem with rot in the floorpans - I am trying as hard as I can to keep up with it, but the SD's just propogate rust.

Enough ranting on my part.

Chris G

[halbl]

First note the 914 came stock with some sound deadening material on the floor. It can be chipped out to get to the rust. In a restoration project I removed all the material, repaired the pans structuraly, painted with POR 15 anti rust paint, applied some undercoating for tack, applied a sound deadening material with an adhesive backing, topped that with a marine coal tar epoxy, and plan to top that with the body color. Total thickness compares to the original. Is there a difference? Yes. One need merely tap on the floor as bare metal and compare to a tap on a stock floor. Should be good for another 25 years.