Hi Abigail, We held the frame of the window up 2" from the top of the slab and carried the stone slab up the 2" to handle any water issues. We also created a sink cabinet that "stands proud" of the rest of the cabinets in order to pull the sink out from the wall to help with splashing, etc. Also, we specified a separate sprayer here rather than using a pull out sprayer in this application for water control. This project was completed several years ago, and to date we have had no issues or complaints about damage to the glass or frame of the windows. Hope this helps!! Thank you for your nice comments!! Gayle