Sawdust?, falling from ceiling!

[rampage42]

I have exactly the same thing on my 08 Affinity.
I’m thinking wood insects.
Have not figured it out.

[CountryFit]

Can you identify what are in the collection of dusts? If all is wood insect waste, fumigation would be the simplist way to get the job done.

[rampage42]

Here is what I have. Does not happen all the time, weird.
Bought some termite spray, have not tried it yet.

[CountryFit]

It doesn't look like termite feces in your photo. California drywood termite is very common in coastal areas, and very damaging; I had to deal with it as late as last month. A rental house in S Cal we own had roof leak during a heavy storm in Jan this year, soaked drywalls in the second floor master bathroom. The mitigation and reconstruction took 4 months to complete (insurance paid for everything except $2500 deductible and a brand new roof from our pocket). During the process I noticed the evidence of the termites. It's the pile of about 1/3 of 1/8" in diameter dark brown loose balls. I had a termite fumigation done last month to get rid of them completely.

If you are not sure, put as much as you can collect the samples into a ziplock bag and take it to a termite control company in your area, they can tell you right away. I assume a tarp/fumigation for a 45' coach won't be more than $500 (maybe $300-$500). But I don't think you have a termite issue. Good luck and let us know how you end up with.

[Safetysteve5]

We had a similar problem. Turned out the source was the ceiling mounted air conditioning vents. When they cut holes to install the vents they don't clean up the wood shavings/dust. Then as you run your AC unit the dust blows out. A small vacuum hose rattled around inside the duct work might get most of it. We still get some from time to time after 5 years. Love those "craftsmen" who build these vehicles!