Mechanic's Lien on Property After Closing

[Jack Martin]

PLEASE HELP!

The house I just purchased on December 6th has just received mechanic's lien for $15K for what I would assume would be for the new the roof the seller's put on the house prior to closing... Can this lien be enforced on me, the new property owner?  Reading through the Title company's (Chicago Title) policy makes it seem like they can easily get out of paying for it even though I have title insurance. Please help.