That depends on the materials your exteriors are made of:
Brick - Brick exteriors should be repainted every 10 to 12 years
Stucco - 6 to 8 years is the standard time between repaintings of stucco
Aluminum Siding - requires repainting every 6 years
Wood Siding - wood siding should be repainted 5 to 7 years is
The best guideline is probably your eye: if it's peeling or chipping, it's probably time to repaint. When in doubt, give us a call at (740) 971-3766, and we'll be happy to answer your questions, give advice, or schedule the services you need.