I figure the best bet would be a house built on top of a mountain covered by black basalt boulders in the desert southwest. Fast zombies or slow, by the time they got halfway up they would be both dehydrated and cooked.
Meat cooked to 150F, muscle fibrils contract heavily causing moisture level to drop precipitously. Fat has fully rendered.
Since zombies would have to walk across the desert, they would already be seriously dried. Much of the year, the temperature above the black basalt would be 170F or more.
It has even been suggested that sites containing high grade nuclear waste be covered with black basalt boulders to keep out the curious.
IKf the radar dish has a transmitter power rating to match the size of that antenna, just rotate down to focus on your object of dislike, power up the transmitter, and - Instant ‘Nuked’ Intruder.