According to the pilot, he was compensating for a crosswind final approach by positioning the tailwheel-equipped airplane into a "steady slip." He landed on runway 25 with a “wheel landing technique,” and during the rollout, as the airplane slowed, a gust of wind struck its right side. The airplane began to veer to the right, and the pilot attempted to regain directional control with full left rudder and opposing aileron, but the airplane continued to veer to the right. The pilot was about to add power "to get some prop blast over the rudder and increase its authority," but the airplane skidded, flipped over and came to rest inverted resulting in substantial damage to the left wing, fuselage, vertical stabilizer, and rudder. The pilot reported there were no mechanical anomalies with the airplane. The winds reported at the airport about the time of the accident were from 310 degrees at 14, gusting to 19 knots.