sound proofing

[Darrel Kline <darrelk@domain.elided>]

>Hello all,
>I have returned to the list after missing  a whole bunch of past posts. I
>can jump in on this one as I have talked about it extensively in the past. I
>used the felt type insulation/soundproofer on the floor of my 76 Scout II
>after I had sandblasted, primed, enameled, and then undercoated it with the
>"rubberized" undercoating. I also applied dynamat sheets on the firewall and
>on the transmission tunnel as well as under the plate the holds the
>transmission lever on. The truck is *real* quiet and not plagued by
>excessive heat rolling up through the floor. The doors were also lined with
>Dynamat and have a real heavy "thunk" to them now when shutting. I also used
>the foil backed insulating material under the roof liner and behind the
>formed side panels that go around the side rear windows. I used
>indoor/outdoor carpet tape to hold it on, it's very aggressive stuff. With
>the windows up one can now listen to the CD player on low and talk to the
>passenger in a normal voice. Very nice.....
>regards,
>
>Garry 

Garry,
Thanks for the info. I made two trips to California this year and the noise
is unbearable. Besides the tire/road noise I also get a lot of wind noise
from the hard top.
I've been thinking that I would use something thicker then primer and paint
on the interior floor. But Rhino lining is what $600 for a Scout II, and
Durabak is probably $250? How about using the 3M rubberized undercoating
that comes in spray cans? I don't know if it's suitable for interior use,
but I don't see why not. It's only 5 bucks a can, and I think 6-8 cans
would do the entire floor. After sandblasting is it mandatory to primer and
paint, or could I spray the undercoating directly onto the bare metal? That
would be too easy. Using the undercoating on both sides of the floor (with
insulation and carpet) should make for a super quiet ride. 
I've heard that there's a certain type of roofing material that can be used
instead of Dynamat that's really cheap. Anybody?

Darrel Kline
Colorado Springs
1980 Scout II