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MichMoose's avatar
MichMoose
Explorer
May 22, 2017

Sound deadening

Hello all.. New to class C. Used to pull 30 ft trailer with diesel VW. I am having a hard time getting used to the noise level of the 2016 Forrest River Sunseeker MBS 2400R. It is built rather well and I am not hearing noise from loose cabinet doors and such, but wind and road noise. I am sure the terrible roads here in Michigan is a big contributing factor. It is unreasonable to expect same kind of noise level as a car but I like to do as much as I can to reduce the noise. I have looked at insulating mat like Dynamat but there are only very small areas I can put that in. Underbody spray like Lizardskin would be more effective but I am hesitant to pull the trigger because of possible warranty implication and expense. Since RVers seems to be natural tinkerers, I am sure some of you may have done something about this. I like to draw on that knowledge and experience. Thank in advance.

15 Replies

  • Floor covering in the cab makes a big difference. The base vinyl floor is durable and easy to clean, but doesn't do anything for noise control. I've noticed in recent years, RV makers stopped ordering the optional cab carpet, and instead throw some house carpet remnants over the cab vinyl. Dynamat will work for this noise. If the road noise is coming from the house, I'm not sure how to help that. The house's wind noise will also be difficult to control, although there' are some tricks which might help a little, such as mini-spoilers, air-tabs, gurney flaps etc. Even just some tape the edges the noisiest windows might help.
  • I understand, I came from a truck camper and found the noise was a lot more in the C.

    My biggest issue on the day I picked it up was that the big window behind the driver was slightly open and the noise was HORRIBLE!!!!!! I was almost in tears as I knew I could never stand all that noise. After I got out of town I stopped to do a check of the unit and open and closed everything and that was when I found the window. It looked closed but was not, a couple minutes of adjusting and it was SOOOOO much better.

    One of my mods was to add carpet and underlay for warmth and comfort and as soon as that was done the noise level dropped big time. Still not perfect but a lot better, absorbs road noise and if there is noise in the camper dulls that.



    The next step was to adjust things. I found the stove cover was rattling so placed a dish towel under that. Pots and pans were rattling so added those sticky foamy shelf liners to stop the lids from rattling. The blind was rattling so made sure to put that up in the morning to stop rattles. Side door needed an adjustment to reduce wind noise - was not bad but you could hear some.

    Now it is a lot better, almost one hundred percent quite from the back end, still some road, wind noise but after all look at the size of what we are driving!
  • Also my hunch is that much of the noise might be tire noise.. Since magnetic hover craft RV is years away, I guess I have to live with it. But in some cars, different brand of tires make lots of difference in terms of noise. I am not going to swap out my brand new tires just on hunch.

    Anyway..... Have anyone here tried out Sprinter SumoSpring Rear Helper Springs. It is basically big rubber between the suspension and body. Maybe these will help reduce the noise as I drive over expansion joints.

    I guess I will eventually just get used to it. But tinkerer / engineer in me wants to give it a shot first.
  • Hello all.. New to class C. Used to pull 30 ft trailer with diesel VW. I am having a hard time getting used to the

    noise level

    of the 2016 Forrest River Sunseeker MBS 2400R. It is built rather well and I am not hearing noise from loose cabinet doors and such, but wind and road noise


    Noise level inside the coach 'was' one of my 'determining' factors when I was buying my first Class C.

    And yes I found some brands were WAY louder than others. It became real apparent as I drove different C's that the high noise level was consistent in these particular manufacture's whether they were used or new.

    I had my heart set on one particular brand of Class C but did not buy it because it was LOUD inside when driving it.

    I did find one that was exceptionally quiet inside and everyone that rides with me always comments on how road noise free it is compared to theirs.

    I left out the names on purpose so as not to start a war. It was IMHO, my personal observance.

    So in answer to your question, IMHO. JMHO, there isn't anything you will be able to do to change it. It is the nature of the beast of some of the Class C's.
  • Oftentimes, manufacturers aren't careful about rough opening sizes for perforations in the skin, vents, filler nossels, storage compartments, ect. Check for day light around these openings and between the shell and inner walls. You can spray expandable foam into these areas. It works as sound proofing as well as quieting many rattles. Keep a can around to fill voids you will find, even after your first or second survey.