Moisture collects in cabin after adding sound deadening to rear wall

I added killmat and sound foam to my doors and rear window wall in my crew max
Doors were first
Rear wall was a few weeks after
Noticed moisture collection in the vehicle after i did the rear wall. Now i do recall there being a rubber plug there. Also i wonder if Toyota designed the rear of the truck wall to dissipate moisture collected in the truck.

 

I was thinking to soundproof rear panel, will definitely look in it. Thanks for sharing this info

 

It’s mild but it is noticeable. Specially the moist smell after rain or damp feeling in the cabin after overnight.
Never had that issue until rear wall was done

 

There is a vent on the rear wall of the cab, so the cabin doesn't hold positive pressure, I bet you covered that up. I dont remember exactly where it is. Uncover it and all will be good. Also if you keep your HVAC on recirculate that helps also.

-Jason

 

Dang I need to find that vent. Thank you!

 

Does any one happen to where the vent is here are pics of my install
Before the install




After the first layer of killmat


And final layer of Noico

 

The crew max is different than the double cab, I bet its supposed to vent around the that window access panel. this is the access cab https://www.tundras.com/threads/air-vents-behind-access-cab-seats-road-noise.41698/ . it will give you a little better understanding.

-Jason

 

Possibility...
https://www.tundras.com/threads/2017-tss-off-road-leaking-under-console.59322/#post-1554295

 

I saw that thread, and it confirms that Toyota is serious about providing a substantial, functional cabin over-pressure vent. IMO, there is not enough clearance around that access cover to guarantee Toyota's idea of "venting" back through that volume. I see nothing else in @SiberianTundra pics that even suggests a dedicated over-pressure vent ala previous Tundra models on the cabin back wall. I conclude it's not there, and it hasn't been covered over.

Typically, the relative humidity inside the cabin is low enough, and the ambient temperature high enough, that condensation inside the cabin is not a problem. The fact that you're observing condensation says you have high relative humidity inside the cabin, and the exterior ambient temperature is low enough (even through the treatment) to reach the dew point. Normally, the way to remove water vapor from inside the cabin is to run the AC...in Defrost if you like, but that's not necessary. If you removed the fiber insulation to replace it with sound treatment, I believe I would re-install it back over the top of the treatment.

As suggested above, you probably have something besides your sweat that is raising the relative humidity inside the cab. Check out the carpet under the dash on the passenger side. Of course, if your AC condensate drain is stopped up and the condensate is just leaking back into the cab as suggested, running the AC won't help...the condensation is simply running in a vicious cycle.

 

Vents are circled in red.

 

Your vents are behind these panels.

 

In that case i did not tape over them.

Thank you for your help

 

Jalopnik did an article on this. On most cars they are called exhausters. I agree that it doesn't look like you covered them up so this is odd.

https://jalopnik-com.cdn.ampproject...er-flaps-are-hidden-behind-your-re-1828016409

 

Actually, can you double check behind your seat? Maybe you partially covered it.

 

Ok i will take the seat out again and check. Last time I took out the seat one of bolts would not thread back in. So I had to retread the bolt and the hole it goes into. Pain in the ... ~Good point I should check.

 

Well it was not taped over but I did cover the passage under seat very well with tool boxes
So after shuffling things around it seems to be much better

 

This happend to me when I took out my back seats too. One of the bolts on mine was bigger than all the others but it went very far back left on the bigger of the two seats in the back.

 

Did you ever figure this out? I thought about adding some sound proofing material in the cab too and this was the first thread that popped up. Hope you got it cleared up!

 

Yes above you can see my response
It was junk in the rear of seat tool boxes and other covering the breathing hole

 

Was wondering if any one has a solution for muffling/killing the seat belt pretensioners from sub? Trying to get rid of that annoying rattle.