What is the recommended overlap percentage for 2.4 GHz coverage cells in a WLAN design?

5% overlap is insufficient for reliable roaming and can create dead zones or connection drops as clients move toward the edge of an AP's coverage cell before the next AP's signal is strong enough.

10% overlap is a commonly cited guideline for 5 GHz cells, not 2.4 GHz, because 5 GHz has more available non-overlapping channels and shorter range naturally limits cell size.

For 2.4 GHz deployments, a 15-20% overlap between adjacent coverage cells is the recommended design target because it provides enough signal crossover for clients to roam seamlessly between APs without dropping connections, while staying below the threshold that would introduce significant co-channel interference between cells on the same channel.

50% overlap is excessive and introduces severe co-channel interference between neighboring APs sharing the same channel, significantly degrading throughput for all associated clients.