I have som 1998 Pella Proline casements. Unfortunately, when they were installed, my builder scraped off all of the serial number decals. How is the rainstrip installed? My experience would be to use a screwdriver to push it into the existing channel. Something tells me I should stick to my day job.
Dave Sr. from SWISCO responded:
January 22, 2018
I believe the rain-strip is just pushed into the channel groove. The kerf type leg should keep it in place.