Cindy/Linda -
Looks like a seal failure to me, which may be covered under a manufacturer warranty for the glass but probably not the labor to install it. From the unused replacement grille holes in t ... read more
Your best bet will be white or red oak. In any kind of wood, I would recomend you to do the finish coat with BONA HIGH TRAFFIC, is the hardest finish yo can put on your floors and is water base.