We have a built in closet. When we removed the bottom drawers we saw the exposed subfloor (diagonals on top of joists).
There are two drawers. They are side by side Each drawer is about 3' wide. 7" high. About 3' deep. The picture shows the right drawer removed.
It's hard for me to reach and work in there. What is the best way to seal it so that I won't get cold air, hot air, bugs etc. ?
I have a crawl space underneath.