Eater DC reports it'll have a roof, will be heated and have fans for circulation, and the front area will be open but can be closed if the weather demands it. They plan for it to still feel like an open space (see the photo from their Facebook.)
The roof was a nice spot during the warm months, so I'm glad it's going to be usable during the cold and rainy ones too.
In addition to roof, which should be open shortly, they're launching a new happy hour menu for Mondays that sounds like some awesome deals: $3 Tecate tallboys, $4 margaritas, and cheap food: chips & salsa for $, the awesome elote (corn) for $2.50, 2 tacos for $3, and more on their Facebook page.
If you haven't been, do yourself a favor and get there. The corn, made with cream, cheese, herds and spices, is amazing.