GM Tech, we talked a little about sound deading on page one of this thread. I have used several layers and diff types of sound deadening (with great results) but Im always looking for just a little more.
From my reading about the only thing left to try is to use some sort of rubber sheets (like 1/8 inch thick). You mentioned "mass loaded rubber". Does that come in rolls or was that a thick matt? What brand did you use? Does it have an odor?
My wife is very sensitive to odors... this is why I held off on any rubber products on the inside of the RV. I did purchase some spray boom matt last year but have not used any yet. I figured I would spray under the RV (esp the fender wells).
I already have 2 to 4 layer diff types of dynomat/fat mat stuff everywhere you can get to under and inside the cabin/hood/dog house areas.
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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