I posted this question last week, but it appears it was closed. We have Vinyl Windows installed, some with integral J Channel and some with Brick Molding and integral J Channel. On one wall of the home, we plan to instead install synthetic stone. I have been researching how best to use these windows with the stone.

I have contacted the stone manufacturer, and they had zero advice to offer. I also contacted the window manufacturer, and they have been no help either.

I have seen this topic posted on a few building sites, but no clear answer as to how to move forward. The window manufacturer doesn’t offer a J Channel filler that snaps in, as some other companies offer.

I am thinking it may be best to install a drip cap at the head, and go over the J Channel. The stone would abut against the window on the sides, but not sure what to do with the gap there and also the sill.

Any insight is appreciated. I have buried myself in this topic for a while, without any clear advice or answers.