Hi, first time posting here... so I recently found a gap between the outside wall of my house and the paving/tiles at the front, and would like to fill it in as this gap is very close to my front door and ants appear to be using it to get into my house. I am completely inexperienced at this sort of thing so any advice as to what I should do/what I should use to fill in this gap would be greatly appreciated. Thanks!
