We have a had our sonos system set up in our house for year, but recently add more speakers outside to our patio. Someone else installed the new system and now we cannot connect to both systems due to the wifi routers. The main problem is that you cannot connect the speakers under one awning to the ones a few yards away under another awning.
Best answer by AjTrek1
Since you did not setup the second router or range extender or access point I suggest you contact that person and find out exactly what they did during setup and why. Then report back with results.