How do you deal with the silent treatment when you are living in the same house?

Ever since BD my husband has been giving me the silent treatment. He avoids eye contact, leaves a room if I enter and hasn't talked to me at all. Even about mundane stuff. I have been giving him lots of space. Not trying to engage him in conversation (relationship or otherwise) but I do still acknowledge his existence with a "good morning" if we see each other in the morning and a "hi" in the evening when he comes home from work if I happen to be downstairs. I am greeted with silence. I have been trying to go for cordial roommate. However, with the holidays upon us we will have several days of family togetherness (myself, husband and the kids). Any tips for dealing with this?