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rjsurfer's avatar
rjsurfer
Explorer
Jan 30, 2017

Smell from walls, definite chemical odor

For the last few years I have experienced an increasing smell coming from the walls of my 9 year old camper. It only occurs on hot days when the sun has been beating down on the wall of the camper. Primarily it's the driver side that's the worst, this is the side that faces the sun when the camper is in outside storage (last 9 years, bright NC sun). I'm thinking that the glue that holds the laminated foam walls is the culprit, it's starting to slowly out gas inside the camper.

Once the sun is off the wall the smell is gone, draping a drop cloth over the offending wall will also stop the smell "immediately"!

First of all has anyone experienced anything like this? And would some sort of interior odor sealing paint (shellac) work?

I do know that this is a problem with some brand new campers which out gas at first but eventually go away but this is the exact opposite, the older the camper gets the worse it gets.


Ron W.

6 Replies

  • It is probably formaldehyde from the cheapo Chinese paneling inside. It is a component of the glues and breaks down into volitile compounds over time and with heat. It is carcinogenic, but what can you do? Replace all the interior plywood walls?

    Google Lumber Liquidators formaldehyde for more info.......
  • No it's not a FEMA trailer and this only started a year or two ago not the normal initial out gassing.

    Brought a new nose into the hunt, a nearby camping neighbor and he brought to my attention the smell is mostly if not all coming from around the black window frames.

    Tomorrow we will take some white duct tape and cover the outside window frame in the bedroom (the worst offender).

    This should keep the heat of the sun off the frame. The frames do get really hot maybe over 130 degrees !

    Ron W
  • I'm not there to smell it but I've been in many when looking, that the formaldehyde was very bad. It outgasges from particle board and foam board and other materials it was used in. I don't how long it might take to quit outgassing if ever.
    Standard procedure use to be open the doors and windows, after taking out of storage and to have a window cracked or something when parked. One reason the fans were so popular, in roofs I heard one time.
    How much of the adhesives and materials still are in motor home construction I don't know. Our 05 doesn't smell but when we first open up we air it out.
    Your's may be something else.
  • My Outback is going on 4 years old now. We don't cook inside and we are not smokers either. When the camper is closed up for a while, when first entering, I can still smell that "new camper smell". It's not like a "new car smell", it's definately "new camper". But not offensive or overpowering. After we get to moving around in it and open the slides, it goes away.

    I think that "new camper smell" probably never goes away completely. Some just smell worse than others. It's a tribute to the type of glues they used during manufacturing.

    If you want to really cover it up? Next time you go camping, start a camp fire and let all the smoke blow inside the camper then shut the camper up. Yea, it will smell like camp fire smoke for a long-long time.... don't ask how I know?
  • Certain adhesives will react with water and heat to outgas. Even wet fiberglass bat insulation has an odor.

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