cab sweat help?
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Junior User
Joined: Jan 2012
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cab sweat help?
Okay so I was having extreme leakage in the cab of my truck, and I finally got sick of it and pulled the headliner off to see what the problem was. The truck came with a skylight and that leaked so I removed it and replaced it with a section of steel. I figured the steel plate could have been leaking, but I was wrong. There is a whole lot of condensation on the inside of the ceiling inside the cab. It has been very rainy here, but I still don't think there should be that much water on the inside of the ceiling, should there? I mean there is a solid water coating up there. Any advice? I have no idea what the problem is or how to fix it.
More Turbo
Joined: Oct 2011
Posts: 636
Likes: 5
From: down a red dirt road
mine had some holes in the firewall and since the cab is unsealed, the insides of the windows and my shift **** were always wet, i never noticed anything else except my door panels being wet. i would suggest trying to seal any holes in the cab you can and maybe that will help it out.
Hotshot
Joined: Sep 2012
Posts: 17,708
Likes: 136
From: Calgary
Make sure all your rubber plugs are in, all possible leaks are sealed, your door seals are good and your window felts seal tight. Leave your windows open on a couple of hot days but make sure you close them before it cools down. Your cab will appear to be dry but your seat foam holds moisture too so give it the extra day. I've had the same problem you have with cube vans with roll up rear doors in Vancouver. It was so bad that it started shorting out my headlight switch. Mmmmm the smell of burnt plastic in the morning.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
I observed that happening too... and I have no sunroof nor cablights.
What is happening is the same thing as a cold beverage on a warm day... the water is forming on the inside sheetmetal due to the interior air being warmer warmer than the outside and so condensation forms and the lack of air circulation doesn't dry it out. It is the leading cause of roof rail rot in these trucks.
I insulated the roof and the phenomenon has ceased to occur. Here is what I used:
What is happening is the same thing as a cold beverage on a warm day... the water is forming on the inside sheetmetal due to the interior air being warmer warmer than the outside and so condensation forms and the lack of air circulation doesn't dry it out. It is the leading cause of roof rail rot in these trucks.
I insulated the roof and the phenomenon has ceased to occur. Here is what I used:
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Junior User
Joined: Jan 2012
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Thanks to everyone. Silver has got it. My uncle suggested the same thing with insulation. To answer everyone else's questions - yes it does have cab lights but I literally just put them on last weekend and so I know they have good seal. Also, my vent window seals need replaced but the door seals and window channels are all new. Probably holes in the cab that need sealed but I believe the main cause is the lack of insulation. It's just steel up there, no insulation. And all that my perforated headliner is doing is sealing the water in there until it collects enough to p!$$ in my lap when I turn. Thanks guys, I'll insulate and see how it goes.
Posting Guru
Joined: Dec 2009
Posts: 2,134
Likes: 1
From: Mississippi
mine had some holes in the firewall and since the cab is unsealed, the insides of the windows and my shift **** were always wet, i never noticed anything else except my door panels being wet. i would suggest trying to seal any holes in the cab you can and maybe that will help it out.
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