Televised sewer from a catch basing in the back of the building approximately 90 ft to check valve in front of building near entrance to garden apartment. Then removed cover near check valve and televised from there downstream to city main sewer. There is an area just past the cast iron for the check valve where the clay tile is broken allowing roots to grow in. Suggest installing a patch liner from check valve past the area where the root are then stopping short of a connection on the left from a downspout.