I would like to build a paver patio next to a large tree that has a 3" wide root at ground level. I do not want to damage the roots of the tree, so it seems like my only option is to build a raised paver patio. If I do build a raised paver patio what material should be used for the perimeter? I assume the roots will be a problem when building the perimeter, for instance if I need to bury the perimeter 4" deep how do I deal with roots that may only be 1" deep? Am I putting the tree at risk by burying the surface roots under a patio? I've considered building a raised deck instead, but I would really prefer a paver patio. Are there any other options for dealing with a situation like this?
Thanks for the help.
Edit: I believe the tree is a New Zealand Christmas tree. It's 20'-25' tall. The patio would be about 5' away from the trunk.