My next hobby project for my 99 Southwind is to try to quiet down my engine compartment.
There isn't much documented feedback on sound deadening options in RV's so I figured I'd take a swing at it.
I have spent about $300 on more dynamat than I care to count and have quite literally coated my entire engine bay and inside of the doghouse, with little relief from my "screaming V10 Triton" on hills. It has helped a very small amount but definitely not $300 worth. Admittedly it has cooled down the doghouse so my feet aren't melting! ☃
My next step which I heard may help, is to place a yoga mat underneath the recently installed "raised vinyl plank" flooring all around the engine bay.
I read somewhere that a yoga mat may help due to its construction. I'm going to go one step further and use a thicker style foam garage floor mat which I bought from Costco, but haven't used. It's the same construction as a yoga mat... only thicker.
I plan to put this under the vinyl flooring, and up against the inner fire wall (dynamat is on the outer wall). I need to replace the raggedy carpet over the doghouse, so I "may" put the foam over top of the stripped doghouse before covering with new carpet (hmm).
I have used a decibel meter while driving and measured before and after the dynamat, with an average reading of 80 decibels. Curious to see if the added yoga mat helps?
Stay tuned! 😬