My kitchen is next an exterior wall of my house. Unfortunately there is a constant flow of cold air coming from underneath the cabinets into the kitchen itself.
Here is a picture of the cabinets:
After taking a closer look, I realized that there is a 1" gap underneath the cabinets that seemed to be the source of the issue:
My guess is that the gap was left there because of the vent, but it's making the floor (and that whole area of the home) very chilly.
What is the best way to safely fill the gap (given the nearby vent) and prevent the flow of cold air?