We want to make our existing concrete patio bigger. However, we're also thinking that in another couple of years we might want to big addition which would include removing the existing slab altogether. So we're not looking to put a larger concrete slab in. At the same time, since the "couple of years" might stretch to 3 or 4 or 5 and further, we're looking for a solid way of adding to the existing slab so that what we end up with does not fall apart I a year or two. As you can see from the photos, the patio has two large trees (+ some PITA bamboo) on one side and slopes down on the other sides. Ideally, we would probably want to expand the patio as close to the trees as possible and then add another couple of feet on the other two sides. What sort of solution would recommend for this? How close to the trees do you think we might get? Thanks!