1.   Adding insulation to an attic floor or above an unheated basement or crawlspace is one of the most cost-effective energy projects.

2.   If you have an unheated basement or crawlspace, tack up rolls of insulation between the ceiling joists to avoid losing heat through the floor.

3.   In colder climates, insulating the ceiling of an unheated basement is a good idea.

4.   She apparently made few friends and slept on a couch in an unheated basement room, the authorities said.