If they've only got 4 or 5 frames drawn you don't need to add a super yet. Just watch the brood nest to make sure it doesn't get plugged up with nectar. It may already be plugged up. I would suggest checking it.
Also, when you put a super on, don't put a queen excluder on the hive. The bees don't like to cross it and it will slow down the comb building.
It's going to be hard to keep that hive from swarming next spring with so little drawn comb. You may have to try a Taranov split. Remind me early next spring and I'll explain how to do that or you can look it up on Google.
If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14
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