Foreclosure and lien for child support?

My ex husband owes 26k in child support arrearage and a judgment for $5,500 for premarital debt he didn't pay. I have personally put a lien on his house for the $5,500 he owes me and I'm sure the Child Support Office has also reported the arrearage against his home as well. He is facing more contempt charges for failure to pay support and has just informed me he is facing the bank foreclosing on his home. If the bank takes the home doesn't the liens have to be paid since they are child support related?