Re: Considering changing to Langs
I am in my third season with Warres so I am in no way an expert. I have had the the same problem with a colony refusing to expand down. When it did this I moved a comb from the outside of the box to the center of the undrawn box and supered it. I know this sounds like heresy but I think it has something to do with a young queens limited brood space needs in her first year. The colony will not draw anymore than she needs. Also light 1-1 syrup can stimulate the house bees to draw more comb but if she is laying all she can they will draw it above the brood nest to store the surplus nectar/syrup coming in.
Not sure how much any of this is helpful with swarming. I had one swarm out and it was in three boxes-I needed to split it but the books said to not worry about swarming the first year.
Herbhome Farm USDA zone 7a