We have a Redwood tree in our backyard that's about 75 feet tall and 6 feet in diameter. The roots are getting close to the concrete patio and in the near future get close to the foundation. We love the tree and would like to keep it and would like to get some advise on what we should consider doing in the short term and long term: a. Prune the roots ? Would pruning cause any stability and health issues to the tree ? Appreciate your respones.