We could perhaps write a book regarding the evolution of the wood window industry and it’s wrangling with the issue of designing windows.
For example, there’s the issue of trying to make a window sash with insulated glass look like it has multi-panes, or what they call “divided-lites.”
They began with “true-divided-lites” a little over two decades ago, but the muntins necessary to house and cover the spacer-bars that separate and hold the panes together…
…necessitated muntin dimensions that were too much of a departure from the classic 7/8″ muntin. I suspect that architects rejected them in mass.
And thus was born the “Simulated-Divided-Lite” feature in windows & doors.
It has been my experience to observe that this feature has for the most part, gone…
…unnoticed by the general property owning populace, because I am continually having to explain why it is a bit more difficult to replace…
…failed or broken glass with “Simulated-Divided-Lite” glass with the muntins that have been adhered semi-permanently to the glass.
Such as these Eagle brand wood clad windows have in this northwest Portland Condo building.
Learning to order the glass correctly with the corresponding simulated spacer-bars that align internally with the simulated…
…muntins, and learning how to correctly re-adhere the simulated muntins to the glass has become a skill-set in and of itself.