Best practice on AP seperation between same side sectors.

We need to add another AP on our tower. What is the minimum distance between sectors needed and what’s a good rule of thumb for not shadowing another AP next to it blocking signal? Pmp 450 3.65

Is this on a full cluster, and are you having to use the same frequency for the second same side AP?

Yes, full cluster of 4 AP’s currently. North, South, East, West. The west side is where we need to add another AP. Just not sure if 1’ separation from same side AP is enough and don’t want to stick out far enough to block part of the 90degree of the south or the north AP. I think we will be able to use a different frequency, currently using all 10mhz.