How to remove/kill mold behind RV walls?

Mold does not care about "dark areas " all it needs to live is moisture and food.
Apparently wood, and the paper backing on drywall are very tasty.
Clorox mix will kill the mold it can get to, and anything you can do to "encapsulate it " or seal it in the areas you cannot get to, will help.
It's not a perfect fix, but it's better than nothing. Then, it is up to you if you want to use it or not.
If you go to sell it, I recommend being totally honest about the problem. You wouldn't want it to come back on you later, if someone gets sick from it.

Mold is not to be taken lightly as some are seriously toxic and shouldn't assume you're okay. Has only been recognized as a problem in more recent times. The Russians have even used it as a biological weapon.

The worst case I've heard of was a 22 room mansion (Glen Tara replica) near Austin TX that a couple bought in '98. All it took was a leaking water line to a fridge to cause mold to insidiously spread throughout the house. The couple and their 3 yo son were coughing up blood. The husband ended up with permanent brain damage (they thought he had Alzheimers at first). Took a long time for them to discover the cause was mold. The house was eventually declared a danger to live in and had to be abandoned. Farmers Ins. initially offered them peanuts and the wife spent years in court before getting something. All so very tragic.

This ended up as an episode on Forensic Files and can be watched here. Melinda Ballard died 5 years ago at 55 allegedly due to kidney disease related to the mold. (Official cause was never made public.) One of MANY stories on this case is here.

Canada has had a lot of cases of mold stemming from the "Leaky Condo Crisis" of the 80s & 90s in buildings due to shoddy construction, poor design and the building code and resulting mold & rot. For quite a few years you could see condos and townhouses all over the place wrapped in humongous tarps while they were stripped down inside and out and rebuilt, costing billions to fix. There are still homes & buildings out today there that have never been addressed and it's buyer beware. Like the Texas mansion case, it can be hiding in your home and you won't know it's there or won't know why you have a persistent cough.

myredracer wrote:
Mold is not to be taken lightly as some are seriously toxic and shouldn't assume you're okay.

I know firsthand about mold and mildew.

Decades ago I was living in a trailer that had water intrusion, but I didn't know about that sort of thing. I was getting very sick about every 3 months. Turns out the foam cushions were full of black mildew.

Not fun.

Good Morning, I am new to this website. I was watching a video on an RV for sale and the salesman showed a wall behind a chair that had "bumps" under the wallpaper. He said it would appear that it was a "factory issue" and not from a leak. And that it was MOLD SPORES under the wallpaper. We have a 2016 Coachman Leprechaun that has some of those "bumps" between the bed and the wall with an emergency window above. We didn't see them at first, and then after we had it awhile I noticed them and thought they were just bumps on the wood before they covered it with paper. They appear to be spreading, and now that I watched that video last night I am very concerned that it could be MOLD SPORES. What do I do??

Open up a suspected wall section (you are later going to put something over it...a shelf, picture, rack of some sort so plan ahead...) see what you see. That will answer your questions.

We had a leak in the corner of our motorhome (from the top corner....which we fixed) but we suspected through use of a moisture meter (great to have) that there was some moisture in the wall. We opened it up, dried it out with fan for weeks/knowing the source was fixed...luckily no mold. Then hubby made a nice cubby rack to screw on to wall to hold additional stuff by the bed.

oh my gosh, I was afraid of that! It's a scatter of small bumps under the wallpaper. Our wall is a short one and nothing could be put over it to hide the area after its fixed. We would have to see if Coachmen has wallpaper we can put over it that matches. Or maybe no one will actually notice it! Thank you.