the girls will only build out drone comb if it is actually needed and they feel they are strong enough to care for drones. Most 1st year hives don't build much drone comb from what everyone else says, but mine did. They are extrememly strong hives though and have a good ratio of drone to workers. If there are other areas in the hive that have drone comb already they may not make any new as well. Some people use those Green plastic frames for drone to get them to freeze, etc..