How to check if there is water infiltration?

[marcarolle]

HI, I have searched numerous sites, forums, Youtube... can't find it.

Planning to inspect a pop-up tent trailer before buying it. I have a checklist of things to check.

But I need to know how to check for water infiltration on the trailer itself, not the roof. One pop-up that I visited had a small soft spot on the floor, at the foot of the rear bed bunk. I would understand such a thing at the front bunk bed, when driving in the rain. But the rear?

How can I check that water does not seep in? Can you point me to a good online resource for help?

Thanks!

Marc

[ScottG]

Look underneath in the corners especially. Many are just bare OSB and it quickly turns black and rots if it has gotten wet much.

[bukhrn]

Sounds like you're doing a decent job on your own, that soft spot on the floor would make me bet my 10 cents that there is water intrusion from somewhere, water doesn't always show up right at the leak, it can seep a long ways before the rot shows up.