4 ms·

They were referring to insulation in internal walls and floors. That is, the floor between the first and second story or the wall between bedrooms.

• hkt 3y ago
  Still good if you want zoning etc, but point taken
• persolb 3y ago
  It's also clear that the floor between levels doesn't have insulation. I'm not sure where the OP got that all the blocks/insulation was the same.