After the annual washing of the patio with a pressure washer, we discovered that water was dripping from the seam between the wall and the interior ceiling, roughly directly under the patio door. Otherwise, there is horizontal paneling a few decimeters down under the patio, but I realized that under the door, there is only an unprotected beam, so I suspect it's where the water has been running down. I assume there should have been a metal sheet there for protection? A bit unsure about the construction but with a poured foundation and how to attach the wooden frame above, is there a risk of water damage? I'm thinking that in the floor inside, there's also insulation. I don't know how far in it goes, though. The door has a frame, so there should be some allowance. Grateful for thoughts, similar experiences, and so on.
The question is really what should happen now. Can I hope that the water has "just" followed the rule and down the wall, and as soon as the water flow stops, it will dry by itself, or is there a risk that the water has accumulated/been absorbed in the insulation and I have to tear up the floor..?