Browning on cedars is quite common. Below are listed a few helpful suggestions.
Browning on cedars could be mites(usually found towards the front of the limb). It looks thin & is usually found on new growth. If mites are a problem a miticide should be applied spring and fall.
If browning is on the inside of limb and on older growth, browning could be because of thick growth.
All cedars should be limed spring and fall, fertilize in the spring no matter what the age, also water late in fall.
Cedars are usually planted near the foundation and that concrete wall can suck the moisture out of the cedars.