Dynamat Sound Deadening Testing Before and After - Worth it?

[kuleinc]

It seems like it would be important for it to not hold water, if you make your own...
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http://www.thesamba.com/vw/forum/viewtopic.php?t=496946 1987 VW Vanagon Westfalia with 1.8T

[igarrett]

Amazing thread. Thanks for the detailed info

Anyone know how much I would need to cover

1. Middle section floor
2. Both middle side panels
3. Engine area
4. Both front doors

Gracias

[erste]

https://www.amazon.com/Dynamat-10455-Self-Adhesive...at+extreme

Dynamat Extreme 36 sq. ft.

I think you'll have more than enough with 72 sq. ft.

You don't need to cover the entire surface. At some point you're wasting material.

I just cut it into 3" strips x 4-6" long and spaced them a few inches apart, tapping the panel, and adding more until it sounds 'dead' everywhere.

I've done the rear hatch gate, full side panels and sliding door, front doors, front seating area, and a little bit onto the "firewall" (or whatever that panel in the front should be called.. bulkhead?).

I have 3 sheets of dynamat left of those 2 packs (18 sheets total).

The only areas I haven't done are the engine area around the engine cover, the middle floor, and the roof. The engine area already has something laid down from the factory, and to be honest I don't want to see a bunch of dynamat when I lift up the carpet. The middle area has a well-fitting pad and I didn't want to interfere with it.

I have a roll of mass loaded laying temporarily over the engine bay and the middle floor.

You might shift your plan a little bit and focus on the front of the cabin instead of the middle, especially the area around the wheel wells. Unless you're missing the molded foam for the middle area...

I looked into spraying something like lizard skin, but for me it was too much of a project - needing a spray gun and compressor and then having to strip the entire van and prep / mask all those surfaces. The dynamat / peel and stick route worked for me because I could work incrementally.

The Extreme stuff is pretty thin, and that makes it good for areas under the molded foam and behind wall panels. You might get some of the thicker stuff for the door skins.

I'm happy with the results and today my girlfriend said it sounded quieter (she didn't know I'd just done the front cabin).

On a separate but related note, I put down reflectix at the same time and the heater blows incredibly hot now. There are probably better options, but the stuff is cheap and I noticed a big difference in retaining heat up front. Just another thing to consider while everything's apart.v

[murph_]

Thank you denwood for doing this great research!