Mine were bearding much bigger than your picture and when Brian and TWT suggested a slatted rack, I ordered them.
One came broken and so I put the unbroken one on the hive with the biggest beard. AMAZING change - those girls are now hanging out on the slatted rack, rather than the outside of the hive.
The other hive, still waiting for the replacement slatted rack, still has a huge beard every night. I expect when it arrives on Monday, I will see the same change.
BTW, I have a SBB, the top propped up with a stick and plenty of unused space in my hive previous to slatted rack.
Linda T in Atlanta