The purpose of the Illinois Weatherization Program is to aid low income single family, owner occupied homeowners in making their homes energy efficient. Weatherization helps to reduce heat loss in winter, and keeps the home cooler in the summer. Each single family house is assessed to determine specific measures allowed per program regulations. Clients must be LIHEAP/PIPP approved for this program. For more information on how to apply for assistance, call the office at 815-232-3141 or 800-883-1111 from 8:00 a.m. to 3:30 p.m.