Ah, the joys of home ownership: our main drain has done a bad thing again. A couple of years back, it was so choked with roots from a city tree that it flooded the basement with icky stuff. This time, it just made a wet patch on the floor.
It seems that the tree (planted about 50 years ago with the house) has got into the city’s pipe, partially collapsing it. We share this outlet with our neighbours, so it’s going to be more involved getting it fixed.
There are a couple of other houses in our short stretch of street that have needed this work done. Much as I like trees in the urban environment, when they get in your drains, it’s personal.