Completely agree, these are nothing new and also only help isolate an area.
We use these all the time, certainly don’t insulate the insulation! I wouldn't say the aluminium really reflects the heat back in makes it nice and shiny though lol The styrofoam is insulation itself. Dereck will know the exact dynamics!
We don’t use them to close off the end of a hive! We use them as a space filler and creates a definite end to each side of the colony for overwintering!
All my colonies overwinter on 7 frames.
Frame 1 is foundation, frame 2 is the partition.(or whatever you want to call it, foam filled frame etc) 3 to 9 is brood nest, 10 is second frame of foam or frame partition.
In the spring the bees as the bees start to grow, they go around the number 2 foam frame and start building on the foundation in no 1 slot. Along you come, see this, remove the two other foam frames from number 2 and 10. replace with new foundation
bees can chew the foam sometimes so we just paint them just like te poly hives
Let the bees tell you when they need more space!!
https://youtu.be/XKUzn1YJ8cI
just to add, i am on Dadants so we have deeper fames.