Hi all - after years of struggling to grow a lawn where only spotty moss thrives, I have decided to go with paving stones with moss growing in between. It is the perfect spot for a little patio/courtyard type of area, and I will finally get some use out of that part of my backyard! Now that I have made the decision - how do I begin? I have a number of issues to deal with:

1.) An underground irrigation system - the pipes are about six inches under the lawn area. I can redirect the spouts to only hit the surrounding flower beds, and not hit the center part that I plan to pave, but I am concerned with what will happen with frost heaves? How do I prevent issues, as I live in New England where this is an issue?

2.) I am hoping to just dig in to the areas of my moss/lawn where I want pavers, and not dig up the entire area. Can I do it this way if I add sand underneath the stones to keep them in place?

3.) Any ideas of types of stone to use? I want to use something large and traditional looking ( flagstone?) but they need to be lightweight enough for myself and my husband to lug around.

TIA to all - and happy gardening!

~Rosa~