Hello, I had water leaking into the house where a flat roof meets up to the side of the house. I removed a few rows of the vinyl siding (and the molded styrofoam behind it) to reveal the flashing. I found that a nail had backed itself out and pushed the flashing away from the side of the house. I was able to correct the issue and nail the flashing flat against the side of the house again, but I'm trying to figure out if the flashing was installed correctly from the beginning. Is it ok to leave this way?. By the looks of it, nothing is really sealing the flashing against the side of the house. It's nailed flat now but I feel like water could still drip behind it if it makes its way behind the siding and styrofoam. I added a piece of duct tape for now over the seam of the flashing and the side of the house just for peace of mind. Attached is a picture, any help is appreciated.

Thank you.

 

Well, since vinyl siding isn't really water proof, anytime you get water behind the siding you will get water behind the flashing. Without a wider picture showing more of the wall and roof, it's hard to say much more than that.

 

flat roof to wall flashings - Bing Images