In dry periods the soil adjacent to the foundation should be watered to maintain constant moisture. Proper watering is critical as the purpose is to keep the soil water content next to and under the foundation at approximately the same moisture content.
The use of a soaker hose is most often the best solution and the soaker hose should be used 24″ to 36″ from the house. In many cases we find homeowners have waited too long before watering and cracks have already occurred in the soil. In many cases starting a watering program at this time is too late.
July, August, and September is when cracks in the soil often appear. You want to have initiated a watering program long before this so the cracks do not appear.
Some of the other maintenance issues: