Do you mean evergreen trees? Your question got cut off please repost. Thanks!!!
Mogie, Yes they are evergreen trees, thirty years old. Thank you. Kathleen
Here is a link that can guide you:
Redcatcec, The best information for all too read. Thank you.
The roots will die and the tree will become unstable and eventually fall down. Unless you know what you are doing, I would not advocate you try this. Call in an expert to give you advice..........Best wishes.
Hi Kathleen, I would not risk cutting the roots, it can damage the tree. Here's some info I located:
here is some info