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
What causes large gaps between window frames and the brick of my home? It looks like someone tried to caulk it previously, but it just pulled away again.
I agree wholeheartedly with the excellent answer provided by Christi at Callen Construction that your problem is probably caused by the different coefficient of thermal expansion of the materials invo ... read more