What to do when sewer plumbing pipes back up

Explanation of how to handle plumbing back ups at homes we manage

Single location? Do what is necessary to get it cleared. NO big deal. 

Major backup is more than 1 room in the house has backup. 

Our policy is 3 times backup on more than 1 room, we need to block calendar and move arriving guests, one month forward upon the 3rd failure. Policy is called "3 Strikes and you are out" 

Please make it clear to owners, that roots have never been cleared and not come back, not a single time.  100% fail. Sometimes its a year, more often its weeks to months.  So, advise them it is not if, its when it backs up again, causing after hours expensive call backs, refunds and guest moves.  So please, we know it is very expensive, but work to find a permanent solution when pipes are collapsing, falling apart or have roots. 

Now, that does not mean you have to wait until 3 strikes happens.