Design Build Go - Sound deadening the rear of the Grenadier.

[mcdoogs]

I did the rear floor only with dynamat and it is noticeably quieter, at least in terms of drone/resonance. I’d say its worth it. It does make wind noise at highway speeds more noticeable, but thats a more pleasant sound imo.

I still have leftover dynamat so i’ll do more flooring and at least the rear wheel wells. Probably not the rear doors, some sort of foam is probably better for that. I do think be far the best bang for buck is the flat rear cargo metal floor, its like a steel drum and the vinyl on top is not very good noise insulation. I wouldn’t recommend buying materials to do more than that. I was dumb and bought a big bunch of dynamat so might as well use it (and i put MT tires on so maybe it’ll cut a little tire noise as they wear down).

 

[shiv.nandak]

I did the rear floor only with dynamat and it is noticeably quieter, at least in terms of drone/resonance. I’d say its worth it. It does make wind noise at highway speeds more noticeable, but thats a more pleasant sound imo.

I still have leftover dynamat so i’ll do more flooring and at least the rear wheel wells. Probably not the rear doors, some sort of foam is probably better for that. I do think be far the best bang for buck is the flat rear cargo metal floor, its like a steel drum and the vinyl on top is not very good noise insulation. I wouldn’t recommend buying materials to do more than that. I was dumb and bought a big bunch of dynamat so might as well use it (and i put MT tires on so maybe it’ll cut a little tire noise as they wear down).

If you have left over dynamat, you could do the floors in the cabin. It is fairly easy to lift the carpet/vinyl at various spots to gain access.

 

[FlyersFan76]

It turns out I didn't have or couldn't find any leftovers that I thought I had. But I did buy more.

I did the cargo floor, middle passenger and front passenger floors. I will get the driver done and under the seats when I have time.

Well worth the price and time. I think the difference is very noticeable.

 

[David Czarnecki]

@David Czarnecki - how is the foam inside the doors WRT moisture retention?

You can select multiple brands that have specific types for this location. I use multiple foams depending on wet or dry and thickness in different areas so panels fit properly after. You have to start near the bottom and overlapping the layers for the water to flow down like a roof helps. Work your way up and don't clog the drain holes.