I’m not sure if this is the right place to post this but I wanted to give it a shot anyway. My partner and I recently purchased an older home. In the kitchen we had the subfloor replaced and are in the process of having new tiling finished.
We noticed that there is some sort of sticky substance that keeps reappearing in between the main door and the screen door. The main door is older and has a weird vent type things on it that I think may have something to do with it but I’m honestly completely lost and confused. I attached photos of the door and what the substance looks like.
If anyone has any guesses or ideas at all I would really appreciate the input.
Thanks so much.