We recently bought two of these windows on a garage sale of a local window provider. We were so happy to have found two windows of the same size with the right color on sale that we quickly bought them.
Now that our shed is advancing, we are wondering how to fix this window on a stud wall. It wouldn't be a problem if there was a wood frame or a nail fin. Sadly, there's nothing like that on it. We are having a really hard time figuring it out.
Here's some picture of the window.
We are currently thinking of replacing the larger Styrofoam by a custom made wood plank, so we can create our own wood frame. Although, I don't think we should have to do that... maybe there's something we are not seeing.