The answer to 'frequency of sod installation' is that most experts recommend installing sod every 5-10 years to maintain a healthy, lush lawn. Sod provides an instant, mature lawn, but it has a limited lifespan and will need to be replaced periodically as the grass thins out and becomes less vigorous.
The exact frequency will depend on factors like climate, soil quality, lawn usage, and maintenance practices. In general, homeowners in warm climates may need to replace their sod more often, while those in cooler regions may be able to go longer between installations. Proper mowing, watering, and fertilization can also extend the life of your sod lawn.