Replacement Windows for Improved Energy Efficiency. New Home Depot article.

As you may know, InterNACHI has partnered with Home Depot and publishes their articles. Here is the latest:

Good read…

I am happy Home Depot is sponsoring us.

Moisture in the wall assembly around windows is a concern.
Metal glider/slider doors and windows circa 1970’s can be an issue.

Please, look at the drapers in the photo of the gliding/sliding doors on the second-floor cantilever bump out.
Two concerns. 1: The soffting below. 2: Full-length drapes to the floor.

I suspect due point condensation.

I also state that $1000 per-pane is highly suspect. I would recommend an IR and inspect the interior assembly. Even a pressure water test on the envelope.