Originally Posted by robert.beck.7737
I've never heard of pressure testing am RV, but it sounds like a good idea. I'll give it a try next time at the dealer. Thanks.
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Your bubbles sound like Moisture alright. If water is wicking in through the roof, such a sealed fitting, it can pick up red dye from the luan construction board or a rusty fastener. Have seen both and can be chalked as red dyed water. It can run down the inside of the wall sit on the luan and soak through to the decorative board inside. A pressure test wouldn't help you, takes too long for the water to complete its route.