Not long after we moved in to the new headquarters we (by necessity) upgraded most of the drains servicing the house from clay to plastic – except one section of about 12 feet. That’s where tree roots have now broken through the old clay pipes, causing our drains to stop draining. Not good.
A crew of guys will be invading the house tomorrow morning to dig a couple deep holes, one in the basement and another outside, and replace the drain. It’s a big job that will take at least the day and maybe part of the next day as well. I will try not to be grumpy.
27th Street 
As I type this, there are guys in my basement with jackhammers. This is the cost of living in a neighbourhood full of mature trees – there are roots everywhere!
I hope it all goes smoothly and quickly. Plumbing fingers crossed for you.
At times like these one almost wishes that one had rented a place.