Need Advice - Slideout Leak on New TT

[gprone]

We just returned from a trip to stormy Cape Hatters where our 10 month old Springdale started leaking on the larger of our two slideouts. This occurred on the first day of our weeklong trip during an early afternoon 2 hour severe thunderstorm.

I watched the situation closely on other days when it rained and found that the rain gutter above the slideout had a seam that had separated and water was pouring down the outside vertical wall of the slideout.

I have already called the dealer upon our return today and they are going to look into the problem.

I have inspected the slideout seal and noticed when I open and close the unit that the seal tends to wrap under itself.

My question is what should I require from the. dealer to make sure the leak is fixed? Clearly the rain gutter needs repaired. But shouldn't the seals on the slideout prevent water from entering the inside cabin no matter how much water is poring down the side?

Is there a test I can witness while the trailer is in repair to make sure the leak is fixed?

Also do I need to call Keystone or just work with the dealer?