[kswai555]

Sometimes when I do laundry or use a lot of water at once sewage backs up into my bathtup and toilet, it has been so bad it almost overflows the entire bathtub, have to use friends' showers to go to work. We've had the roto rooter guys out many times now and the problem is usually fixed for a bit but comes back within a week or so. We've had to cut down and kill several trees in our back yard, they had said it was the roots, but still happening, would like the issue to be resolved permanently. what are my other options, the roto rooter guys don't seem to know what else to do, or just like getting my business too much. My house is old (1920) and the plumbing not updated for a long long time...

[speedball1]

City sewer or septic system? If roots are getting into your lines the pipe must be cracked or open someplace allowing roots to enter. I can give you some relief on the roots. Going in, let me say that sooner or later you're going to have to bite the bullet and replace that old sewer line with PVC. If you wish to control roots RootX or Robics Foaming Root Killer that contain Dichlobrnic are two products you could try.
A less expensive way would be to call around to garden supply stores and ask for fine grain Copper Sulphate. Put a 1/2 pound in your toilet and flush it down. Repeat in 6 months.
Hope this helps and thank you for rating my answer, Tom