Building on heidip's question on when to add the 2nd deep to complete the brood boxes, everything that I have read so far in my books is to add the 2nd deep on top whether it is comb or foundation.
Books offer to put new box over the brood box. I have found usefull to put second box in spring uder brood area.
Heidi writes that he has cold weathers.
If you read Canadian adviced you may find often that in spring that they recommend to enlarge under brood area, for hive warming.
If you are in Florida and your nights are near 20C, it is same what you do. +10C is cold for bees and note that nights are worst than days.Heidi's basic issue is that hive has now 6 frames bees.
She ask when to add boxes.
The answer is :
1) Wait untill she had bees in every gap of frames (bees emerge)
2) All foundations are drawn up
3) If Hiedi does not know when it is time to give a second box, it is better to give under brood are when first box is almost all drawn.BUT
if Heidi has rape or something else which gives huge amount nectar in one week, she should be carefull and give second foundation box under brood area. If colony is small, it is not able to warm up empty foundation box in cold climate. It slow down progress and chalk brood may appear soon into hive.
Warm air rise up even in hive