Okay guys - I have read your comments now help me!! :o) Our windows are deep set in the frames. Around 4-5". We had a major termite infestation and did not discover the damage around the window casings until around a year ago. Teh termite tunnels caused erosion right in the upper corner where the wall and the window inset meet. How in the world do I fix that. Use caulk in thin layers. It looks like I need to clean rock out first. I have been trying to get my husband to fix it for quite a while so just tell me what to do and I will handle it. THANK YOU!!!