Chuck L.

Agree. This Narroline 200 series was an abysmal failure with gas leak, sash rot, and sill rot being major issues. At the time, Andersen had a stellar reputation. I would not buy an Andersen product after this experience.

Thanks for weighing in. That may be true for easily accessible single windows. But when we have to consider triple mullioned windows, only one of which needs replacement, 2 story foyer windows, and the labor involved with removing interior trim and sill, then re-caulking after reinstalling trim, hoping that touch-up paint of the interior color matches, etc., it's worth exploring options that don't include that.

I have a house full of 1993 Andersen Narroline 200 series windows. Many sashes were replaced free of charge by Andersen earlier under the 20 yr. warranty because the gas between the panes leaked out. But I still have the original frames and several of the sills are rotted out. Since Andersen is no longer supporting these windows with replacement sills, and dismantling the window and trim inside and out is an undesirable approach, here's my idea: Tell me what challenges this will present. Solutions to refine are invited and welcome. 1. Slit the vinyl sill cover from above and remove rotted wood. 2. Close cover back over and fill cavity with foam. (drill multiple holes if needed similar to what would be done in an epoxy foundation repair). 3. Cover sill with a thin sheet of moldable plastic or fiberglass or other, that is attached to and molded to the shape of the existing sill. 4. Paint repaired sill cover.