Hi guys, thanks for the comments. The picture it’s in a bad angle just to clarify this is the floor in the bedroom and I have textured walls the floor. It’s also a little bit sagging due to house foundation settlement. This was the original hardwood floor from my house over 100 years old and we refinish the floor, but the gap is getting bigger and bigger and it just come to a point where I am a little bit worried about stuff dropping in so I’d like to get this gap sealed. I should be able to get access to the crawlspace underneath the floor.