After a few rains I have noticed water on the kitchen counter. I picked up butyl tape to seal the frame but was also recommended to run sealant around the window frame. If I have a occasional leak wit...
I had the exact same type of leak, found water on the countertop. I thought I do it right and pull the window but after taking out all the screws I found that the frame was so stuck to the side wall I was starting to deform the frame trying to pry it off. I just said the hell with it and siliconed the outside around the frame and it's been good for 2 years.